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Influenza infection Primary care

Chukwuma Iwundu, Clare MacRae, Eleftheria Vasileiou

Type
Disease or syndrome
ID
PH800
Version ID
2224
Valid event data range
01/01/2001 to 31/01/2021
Sex
Female/Male
Agreement Date
2021-11-12
Coding system
Read codes v2 CTV3 codes SNOMED CT codes
Tags /Collections
BREATHE Phenotype Library

Definition

  • Not found code search
  • Wabe et al, 2021The aim of the study was to evaluate the accuracy of assigned International Classification of Diseases version 10-Australian Modification (ICD-10-AM) codes for influenza by comparing with patients’ results of their polymerase chain reaction (PCR)-based laboratory tests.Although ICD-10-AM coding for influenza demonstrated high accuracy when laboratory results were received before discharge, its sensitivity was substantially lower for patients whose test results were not available at discharge. The timely availability of laboratory test results during the episode of care could contribute to improved coding accuracy.The timely availability of laboratory test results during the episode of care could contribute to improved coding accuracy.Feemster et al, 2012We used Pediatric Health Information System data and laboratory records from 3 children's hospitals to determine whether administrative data accurately identify children with laboratory-confirmed influenza.The objective of this multicenter study was to validate influenza-specific ICD-9 codes for the identification of influenza cases among hospitalized childrenAmong 23 282 inpatients, diagnosis codes for influenza detected 73% of laboratory-confirmed influenza cases, whereas <1% of patients without a diagnosis code had laboratory-confirmed influenza.Keren et al, 2006To determine the sensitivity and positive predictive value of influenza-specific ICD-9 admission or discharge codes (487.0, 487.1, and 487.8), we conducted a retrospective cohort study of all patients <21 years of age hospitalized at the Children's Hospital of Philadelphia with laboratory-confirmed influenza during 3 consecutive influenza seasons (July 2001 through June 2004)Influenza-specific ICD-9 codes assigned in a setting of routine rapid diagnostic testing may be useful for following trends. However, these codes will substantially underestimate the actual number of influenza-related hospitalizations.

Implementation

These codes are not intended to be mandatory, but are to be used as a starting point for the identification of influenza infection in routine Electronic Health Record (EHR). Each study may differ in the sensitivity and specificity of the coding required.

According to the National Health Service (NHS), Influenza is a common infectious viral illness spread by coughs and sneezes. Some of the main symptoms of influenza include: high temperature (fever) of 38C or above, tiredness and weakness, headache, general aches and pains and dry or chesty cough. Cold-like symptoms, such as a blocked or runny nose, sneezing, and a sore throat, can also be caused by influenza, but they tend to be less severe than the other symptoms.

https://www.nhsinform.scot/illnesses-and-conditions/infections-and-poisoning/flu

According to the National Institute for Health and Care Excellence (NICE) guidelines, Influenza is an acute respiratory illness caused by RNA viruses f the family Orthomyxoviridae (influenza viruses). There are three types of influenza virus: Influenza A occurs more frequently and is more virulent. It is responsible for local outbreaks, larger epidemics and pandemics. Influenza B often co-circulates with influenza A during the yearly outbreaks. Generally, influenza B causes less severe clinical illness, although it can still be responsible for outbreaks. Influenza C usually causes a mild or asymptomatic infection similar to the common cold.

Influenza presents with symptoms appearing around 2 days after exposure. Uncomplicated influenza signs and symptoms include: coryza, nasal discharge, cough, fever, gastrointestinal symptoms, headache, malaise, myalgia, arthralgia, ocular symptoms, and sore throat. Complicated influenza is defined by signs and symptoms that: require hospital admission, involve the lower respiratory tract, central nervous system, or cause significant exacerbation of an underlying medical condition.

https://cks.nice.org.uk/topics/influenza-seasonal/

Not found code search


Publications

  • Publications in 2020-2021 identified in PubMed

  • Moss JWE, Davidson C, Mattock R, Gibbons I, Mealing S, Carroll S. Quantifying the direct secondary health care cost of seasonal influenza in England. BMC Public Health. 2020 Sep 29;20(1):1464. doi: 10.1186/s12889-020-09553-0. PMID: 32993588; PMCID: PMC7526100.

  • Ramsay J, Minton J, Fischbacher C, Fenton L, Kaye-Bardgett M, Wyper GMA, Richardson E, McCartney G. How have changes in death by cause and age group contributed to the recent stalling of life expectancy gains in Scotland? Comparative decomposition analysis of mortality data, 2000-2002 to 2015-2017. BMJ Open. 2020 Oct 7;10(10):e036529. doi: 10.1136/bmjopen-2019-036529. PMID: 33033012; PMCID: PMC7542937.

  • Wabe N, Li L, Lindeman R, Post JJ, Dahm MR, Li J, Westbrook JI, Georgiou A. Evaluation of the accuracy of diagnostic coding for influenza compared to laboratory results: the availability of test results before hospital discharge facilitates improved coding accuracy. BMC Med Inform Decis Mak. 2021 May 22;21(1):168. doi: 10.1186/s12911-021-01531-9. PMID: 34022851; PMCID: PMC8141245.

  • Fitzpatrick T, Malcolm W, McMenamin J, Reynolds A, Guttmann A, Hardelid P. Community-Based Antibiotic Prescribing Attributable to Respiratory Syncytial Virus and Other Common Respiratory Viruses in Young Children: A Population-Based Time-series Study of Scottish Children. Clin Infect Dis. 2021 Jun 15;72(12):2144-2153. doi: 10.1093/cid/ciaa403. PMID: 32270199.

  • Code repositories

  • ID- 1 - Repository- Manchester Clinical Codes - Description- Trends in antibiotic prescribing in primary care for clinical syndromes subject to national recommendations to reduce antibiotic resistance, UK 1995-2011: analysis of a large database of primary care consultations - Conditions- URTI - Publication- https://doi.org/10.1093/jac/dku291 - Clinical codes- Read Version 2

  • ID- 2 - Repository- HDR UK National Phenomics Resource Project - Description- A chronological map of 308 physical and mental health conditions from 4 million individuals in the English National Health Service - Conditions- Infections of other or unspecified organs - Publication- https://doi.org/10.1016/S2589-7500(19)30012-3 - Clinical codes- ICD-10

  • ID- 3 - Repository- HDR UK National Phenomics Resource Project - Description- A chronological map of 308 physical and mental health conditions from 4 million individuals in the English National Health Service - Conditions- Lower respiratory tract infections - Publication- https://doi.org/10.1016/S2589-7500(19)30012-3 - Clinical codes- ICD-10

  • ID- 4 - Repository- HDR UK National Phenomics Resource Project - Description- A chronological map of 308 physical and mental health conditions from 4 million individuals in the English National Health Service - Conditions- Viral diseases (excl chronic hepatitis/HIV) - Publication- https://doi.org/10.1016/S2589-7500(19)30012-3 - Clinical codes- ICD-10

  • ID- 5 - Repository- HDR UK National Phenomics Resource Project - Description- Incidence of Community-Acquired Lower Respiratory Tract Infections and Pneumonia among Older Adults in the United Kingdom: A Population-Based Study - Conditions- Pneumonia - Publication- https://doi.org/10.1371/journal.pone.0075131 - Clinical codes- ICD-10

  • ID- 6 - Repository- OpenSAFELY - Description- Codes indicating a diagnosis of influenza or influenza-like illness - Conditions- Documented influenza illness - Publication- - Clinical codes- CTV3 (Read V3) with TPP extensions

  • ID- 7 - Repository- OpenSAFELY - Description- Codes indicating a diagnosis of a lower respiratory tract infection excluding pneumonia - Conditions- Lower respiratory tract infection - Publication- - Clinical codes- CTV3 (Read V3) with TPP extensions

  • ID- 8 - Repository- OpenSAFELY - Description- Pneumonia ICD-10 codes - Conditions- Pneumonia secondary care - Publication- - Clinical codes- ICD-10

  • ID- 9 - Repository- LSHTM Data Compass - Description- Code list: ICD-10 codes for pneumonia - Conditions- Pneumonia - Publication- https://doi.org/10.17037/DATA.00000847 - Clinical codes- ICD-10

  • ID- 10 - Repository- LSHTM Data Compass - Description- Clinical codelist: Read codes and terms used for pneumonia (CPRD) - Conditions- Pneumonia - Publication- https://doi.org/10.17037/DATA.00001654 - Clinical codes- Medcodes

Clinical Code List

Rows: 152
Code Description SNOMED CT Concept ID SNOMED CT Description ID Read v2 BREATHE recommended HDR UK National Phenomics Resource Project 5
1010051000006110 Haemophilus influenzae type B and meningitis C vaccination 1010051000006106 1010051000006110 N
1024921000006116 Adverse reaction to *Influenza & Common Cold 1024921000006100 1024921000006116 N
1048401000006110 Adverse reaction to Inactivated Influenza (Split Virion) Paediatric 1048401000006106 1048401000006110 N
1072231000006119 Adverse reaction to Sanofi Pasteur Inactivated Influenza Split Virion 1072231000006103 1072231000006119 N
1083051000006115 Adverse reaction to Inactivated Influenza (Split Virion) 1083051000006104 1083051000006115 N
1083281000006116 Adverse reaction to Inactivated Influenza Vaccine, Surface Antigen 1083281000006100 1083281000006116 N
1113881000006112 Adverse reaction to Uniflu Plus Gregovite C 1113881000006108 1113881000006112 N
1116591000006118 Adverse reaction to Haemophilus Influenzae Type B Polysaccharide 1116591000006102 1116591000006118 N
1118771000006112 Adverse reaction to *Influenza & Common Cold 1118771000006108 1118771000006112 N
1119661000006117 Adverse reaction to Haemophilus influenzae type b polysaccharide, conjugated 1119661000006101 1119661000006117 N
1120351000000115 Influenza A virus H1N1 subtype contact 444426005 1179031000000118 65PT.00 N
1122041000000117 Swine influenza contact 444426005 1651131000000116 65PT.11 N
1122831000000118 Suspected Influenza A virus subtype H1N1 infection 505251000000100 1122831000000118 1J72.00 Y
1125021000006114 Adverse reaction to Haemophilus Influenzae B Polysaccaride Conjugated To Tetanus Protein 1125021000006105 1125021000006114 N
1125031000006112 Adverse reaction to Haemophilus Influenzae B Polysaccaride Conjugated To Diphtheria Protein 1125031000006108 1125031000006112 N
1126371000000114 Influenza A virus H1N1 subtype detected 711330007 3078435012 4J3L.00 Y
1126431000000117 Influenza A virus H1N1 subtype not detected 711334003 3078060015 4J3M.00 N
1126551000000111 Local flu response centre notified 506871000000103 1126551000000111 9G5..00 N
1126621000000117 Influenza A virus H1N1 subtype close contact 506901000000103 1126621000000117 65PV.00 N
1128141000000118 Influenza A (H1N1) swine flu 442696006 1128141000000118 H2A..11 Y
1131081000006113 Adverse reaction to Inactivated Influenza Vaccine 1131081000006109 1131081000006113 N
1135701000000110 Possible influenza A virus H1N1 subtype 506751000000104 1135701000000110 1W0..00 Y
1136091000000113 History of influenza vaccination 473169009 2955980010 14b3.00 N
1138151000000117 Advice given about Influenza A virus subtype H1N1 infection 511781000000101 1138151000000117 8CAR.00 N
1143141000000112 Influenza A virus subtype H1N1 serology 1002251000000108 2584601000000116 4JDe.00 N
1143761000006119 Adverse reaction to Haemophilus Influenzae (Lyophilized Bacterial Lysates) 1143761000006103 1143761000006119 N
1149291000000110 No response to influenza vaccination invitation 516101000000103 1149291000000110 68Nu.00 N
1158771000000112 Consent given for influenza A subtype H1N1 vaccination 518961000000102 1158771000000112 68Nt.00 N
1161531000000115 Advice given about swine flu by telephone 520171000000102 1161531000000115 8CAR011 N
11931191000006114 Influenza vaccination requested 785541000000100 1756791000000118 N
11934921000006113 Administration of first quadrivalent (QIV) inactivated seasonal influenza vaccination 11934921000006109 11934921000006113 N
11934931000006111 Administration of first non adjuvanted trivalent (TIV) inactivated seasonal influenza vaccination 11934931000006107 11934931000006111 N
11934951000006116 Administration of second non adjuvanted trivalent (TIV) inactivated seasonal influenza vaccination 1.19349510000061e+16 11934951000006116 N
11934961000006119 Administration of adjuvanted trivalent (aTIV) inactivated seasonal influenza vaccination 11934961000006103 11934961000006119 N
11934971000006114 First quadrivalent (QIV) inactivated seasonal influenza vaccination given by pharmacist 11934971000006105 11934971000006114 N
11934981000006112 First non adjuvanted trivalent (TIV) inactivated seasonal influenza vaccination given by pharmacist 11934981000006108 11934981000006112 N
11935001000006115 Second non adjuvanted trivalent (TIV) inactivated seasonal influenza vaccination given by pharmacist 11935001000006104 11935001000006115 N
11935021000006113 Administration of first quadrivalent (QIV) inactivated seasonal influenza vaccination given by other healthcare provider 11935021000006109 11935021000006113 N
11935031000006111 Administration of first non adjuvanted trivalent (TIV) inactivated seasonal influenza vaccination given by other healthcare provider 11935031000006107 11935031000006111 N
11935061000006119 Administration of adjuvanted trivalent (aTIV) inactivated seasonal influenza vaccination given by other healthcare provider 11935061000006103 11935061000006119 N
11935071000006114 Administration of second quadrivalent (QIV) inactivated seasonal influenza vaccination given by other healthcare provider 11935071000006105 11935071000006114 N
11935081000006112 Adjuvanted trivalent (aTIV) inactivated seasonal influenza vaccination given by pharmacist 11935081000006108 11935081000006112 N
11935091000006110 Administration of second non adjuvanted trivalent (TIV) inactivated seasonal influenza vaccination given by other healthcare provider 11935091000006106 11935091000006110 N
11935101000006116 Second quadrivalent (QIV) inactivated seasonal influenza vaccination given by pharmacist 1.19351010000061e+16 11935101000006116 N
11935111000006118 Administration of second quadrivalent (QIV) inactivated seasonal influenza vaccination 11935111000006102 11935111000006118 N
11966421000006117 Adverse reaction to Influenza Vaccine Tetra Myl 11966421000006101 11966421000006117 N
11989891000006112 Adverse reaction to Influenza Myl 11989891000006108 11989891000006112 N
1206286018 Haemophilus influenzae septicaemia 447685007 2898280014 A384100 Y
1227545013 [V]Flu - influenza vaccination 1411000119106 2916683016 ZV04811 N
1229740013 Influenza with bronchopneumonia 41269000 1229740013 H270000 Y
1232627018 Pneumonia due to parainfluenza virus 64917006 499984015 H202.00 Y
123962018 Influenza with encephalopathy 74644004 123962018 H27y000 Y
1256621000033114 Influenza virus inactivated split (H1N1, H3N2-like, B/Brisbane/60/2008-like, strains) 1256621000033105 1256621000033114 N
12589011000006116 Adverse reaction to Influenza virus inactivated split (H1N1, H3N2-like, B/Brisbane/60/2008-like, strains) 1.25890110000061e+16 12589011000006116 N
12680721000006111 Hib (Haemophilus influenzae type b) and meningococcal group C vaccination 428975001 2772561000000117 N
12681331000006117 First diphtheria, tetanus, whooping cough, Hib (Haemophilus influenzae type b), polio and hepatitis B vaccination 1082441000000108 2772741000000110 N
12681341000006110 Second diphtheria, tetanus, whooping cough, Hib (Haemophilus influenzae type b), polio and hepatitis B vaccination 1082451000000106 2772751000000113 N
12681351000006112 Third diphtheria, tetanus, whooping cough, Hib (Haemophilus influenzae type b), polio and hepatitis B vaccination 1082461000000109 2772761000000111 N
12715991000006110 [X]Influenza vaccine causing adverse effects in therapeutic use 104371000000107 160081000000117 N
12721231000006111 Pneumonia or influenza NOS 540151000000108 1204911000000119 Y
13002211000006112 Seasonal influenza vaccination given in school 1239861000000100 2801761000000112 N
142934010 Influenza vaccination 86198006 142934010 65E..00 N
1484830012 Influenza vaccination contraindicated 390796006 1484830012 8I2F.00 N
1485436015 Parainfluenza virus antibody level 1005101000000108 2561381000000118 43dg.00 N
1485437012 Parainfluenza type 2 antibody level 1005091000000100 2560781000000114 43df.00 N
1485540014 Parainfluenza type 3 antibody level 1005111000000105 2556351000000110 43dh.00 N
151462017 Haemophilus influenzae infection 91428005 151462017 A3B5.00 Y
1783752014 Haemophilus influenzae B IgG level 996761000000106 2572551000000119 43WV.00 N
1784697017 Influenza A antigen level 1001341000000106 2573071000000110 43k2.00 N
1784698010 Influenza B antigen level 1001351000000109 2563871000000113 43k3.00 N
1792361000000119 Influenza A nucleic acid detection 1029881000000100 2595551000000117 43w6.00 N
1803861000006110 Adverse reaction to Influenza Virus Live Attenuated 1803861000006106 1803861000006110 N
1804181000006111 Adverse reaction to Influenza Vaccine (Live Attenuated) 1804181000006107 1804181000006111 N
2395701000000111 Long term indication for seasonal influenza vaccination 935351000000106 2395701000000111 8BQ1.00 N
2397631000033114 Influenza Myl 2397631000033105 2397631000033114 N
2608911000000114 Influenza due to zoonotic influenza virus 1033051000000101 2608911000000114 Y
2608951000000113 Influenza due to pandemic influenza virus 1033071000000105 2608951000000113 Y
2608991000000117 Influenza due to seasonal influenza virus 1033091000000109 2608991000000117 Y
2609031000000111 Influenza with pneumonia due to seasonal influenza virus 1033111000000104 2609031000000111 Y
2636251000000110 Parainfluenza group RNA (ribonucleic acid) detection assay 1046151000000109 2636251000000110 N
265445015 Influenza vacc consent given 171290003 2837355012 68NV.00 N
2820795016 Influenza due to Influenza A virus subtype H1N1 442696006 2820795016 H2A..00 Y
285858017 Has 'flu vaccination at home 185900003 285858017 9OX1.00 N
285859013 Has'flu vaccination at surgery 185901004 285859013 9OX2.00 N
288067017 [X]Haemophilus influenzae infection, unspecified 91428005 151462017 Ayu3U00 Y
296887012 Post influenza vaccination encephalitis 192721000 296887012 F034G00 Y
301057016 Acute haemophilus influenzae laryngitis 195684009 301057016 H040400 Y
301108016 Acute haemophilus influenzae bronchitis 195721005 301108016 H060800 Y
301413010 Influenza with pneumonia, influenza virus identified 195878008 301357010 H270100 Y
301414016 Influenza with pneumonia NOS 195878008 301357010 H270z00 Y
301415015 Influenza with other respiratory manifestation 6142004 11203012 H271.00 Y
301416019 Influenza with laryngitis 195923003 301416019 H271000 Y
301417011 Influenza with pharyngitis 195924009 301417011 H271100 Y
301418018 Influenza with respiratory manifestations NOS 6142004 11203012 H271z00 Y
301421016 Influenza with other manifestations 6142004 11203012 H27y.00 Y
301424012 Influenza with other manifestations NOS 6142004 11203012 H27yz00 Y
301431011 Pneumonia or influenza NOS 195878008 301357010 H2z..00 Y
3555871000006115 Parainfluenza virus pneumonia 64917006 107903018 Y
3555891000006119 Pneumonia due to parainfluenza virus 64917006 1232627018 Y
3555901000006115 Parainfluenza pneumonia 64917006 3035270018 Y
387051000006110 [X]Flu+oth respiratory manifestations,'flu virus identified 6142004 11203012 Hyu0400 Y
388291000006111 [X]H influenzae as cause/diseases classified/other chapters 91428005 151462017 AyuKC00 Y
389901000006115 [X]Influenza+other manifestations,influenza virus identified 6142004 11203012 Hyu0500 Y
396106019 Influenza NOS 6142004 11203012 H27z.00 Y
4063911000006112 Influenza like illness 95891005 2920741013 Y
407721000000118 Haemophilus influenzae type B and meningitis C vaccination 428975001 1664081000000114 65b..00 Y
456021000006115 Acute bronchitis due to parainfluenza virus 195726000 301114011 H060C00 Y
459620016 Influenza A antibody level 1014261000000103 2582871000000118 43dF.00 N
459621017 Influenza B antibody level 1014271000000105 2552471000000113 43dG.00 N
460150015 H/O: influenza vaccine allergy 294647003 434938013 14LJ.00 N
460160012 Influenza vaccination invitation letter sent 315641001 460160012 9OX6.00 N
4780481000006116 Acute parainfluenza virus bronchitis 195726000 301114011 Y
498121000033114 Haemophilus Influenzae B Polysaccaride Conjugated To Tetanus Protein 498121000033105 498121000033114 N
498321000033111 Haemophilus Influenzae B Polysaccaride Conjugated To Diphtheria Protein 498321000033107 498321000033111 N
546421000006115 Chest infection - influenza with pneumonia 195878008 301357010 H270.11 Y
5791421000006116 Influenza split virion vaccine adverse reaction 293112000 433297017 N
5791431000006118 Influenza surface antigen vaccine adverse reaction 293113005 433298010 N
642021000033115 Inactivated Influenza (Split Virion) 642021000033104 642021000033115 N
676781000000110 Influenza H1 virus detected 441043003 2882417014 4JU0.00 Y
676841000000114 Influenza H2 virus detected 440927002 3034688012 4JU1.00 Y
676901000000115 Influenza H3 virus detected 441049004 2882421019 4JU2.00 Y
676961000000116 Influenza H5 virus detected 441343005 2882423016 4JU3.00 Y
677021000000113 Influenza A virus, other or untyped strain detected 359351000000100 676741000000119 4JU4.00 Y
677081000000114 Influenza B virus detected 441345003 2794563017 4JU5.00 Y
689941000000115 Human parainfluenza virus detected 441344004 2790535011 4JUF.00 Y
712231000033111 Sanofi Pasteur Inactivated Influenza Split Virion 712231000033107 712231000033111 N
7267051000006117 Influenza A (H1N1) 442696006 2820794017 Y
7267061000006115 Influenza caused by Influenza A virus subtype H1N1 442696006 3291265019 Y
7293041000006114 Exposure to Influenza A virus subtype H1N1 444426005 2840615016 N
7293051000006111 Exposure to swine influenza virus 444426005 2840616015 N
762181000006116 Flu like illness 95891005 1235951017 H27z.11 Y
7649691000006115 Haemophilus influenzae type b infection 709410003 3039757019 Y
7649701000006115 Hib (Haemophilus influenzae type b) infection 709410003 2496051000000114 Y
7696051000006119 First vaccination with Haemophilus influenzae type B and Neisseria meningitidis serotype C combination vaccine 712834006 3285842011 N
778711000006116 Influenza like illness 95891005 158839016 H27z.12 Y
778871000006116 Influenza with pneumonia 195878008 301357010 H270.00 Y
808051000006112 H influenzae as cause/diseases classified/other chapters 91428005 151462017 A3BXD00 Y
8190511000006118 Suspected influenza A virus subtype H1N1 infection 505251000000100 1135801000000116 Y
843921000033117 *Influenza & Common Cold 843921000033101 843921000033117 Y
851321000033116 Haemophilus influenzae type b polysaccharide, conjugated 851321000033100 851321000033116 N
880121000033116 Haemophilus Influenzae Type B Polysaccharide 880121000033100 880121000033116 N
885251000006114 Influenza + pneumonia 195878008 885251000006114 H270.99 Y
885261000006111 Influenza + encephalopathy 74644004 885261000006111 H27y099 Y
885271000006116 Pneumonia/influenza NOS 540151000000108 885271000006116 H2z..99 Y
906821000033118 Haemophilus Influenzae (Lyophilized Bacterial Lysates) 906821000033102 906821000033118 N
924501000006111 Influenza vaccination 924501000006107 924501000006111 N
931801000006112 [X]Influenza vaccine causing adverse effects therapeutic use 420113004 2578720016 U60K400 N
932221000006114 Adv react: influenza vaccine 104371000000107 932221000006114 U60K499 N
955561000006112 Adverse reaction to influenza vaccine 955561000006108 955561000006112 N
966421000033119 Inactivated Influenza Virus Whole Virion Vero Cell Derived 966421000033103 966421000033119 N
966521000033115 Inactivated Influenza Virus Split Virion Adjuvanted 966521000033104 966521000033115 N
No found code Chest infection- influenza with pneumonia 195878008 301357010 H270.11 Y Y
Rows: 57
Code Description BREATHE recommended Open Safely 5 Open Safely 6
G5203 Acute myocarditis - influenza Y Y
H2... Pneumonia and influenza Y Y Y
H27.. Influenza Y Y Y
H270. Influenzal pneumonia Y Y Y
H2700 Influenza with bronchopneumonia Y Y Y
H2701 Influenza with pneumonia, influenza virus identified Y Y Y
H270z Influenza with pneumonia NOS Y Y Y
H271. Influenza with other respiratory manifestation Y Y Y
H2710 Influenza with laryngitis Y Y Y
H2711 Influenza with pharyngitis Y Y Y
H271z Influenza with respiratory manifestations NOS Y Y Y
H27y. Influenza with other manifestations Y Y Y
H27y0 Influenza with encephalopathy Y Y Y
H27y1 Influenza with gastrointestinal tract involvement Y