J09-J18 ICD-10-CM Code: Influenza and pneumonia

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for J09-J18 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Don’t confuse J09-J18 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of J09-J18 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

• J82— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of allergic or eosinophilic pneumonia adds J82; it is not part of this code and both may be reported when both are documented.

  Full comparison: J09-J18 vs J82 →

• J69.0— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of aspiration pneumonia NOS adds J69.0; it is not part of this code and both may be reported when both are documented.

  Full comparison: J09-J18 vs J69.0 →

• P24.01— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of meconium pneumonia adds P24.01; it is not part of this code and both may be reported when both are documented.

  Full comparison: J09-J18 vs P24.01 →

• P24— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of meconium pneumonia adds P24; it is not part of this code and both may be reported when both are documented.

  Full comparison: J09-J18 vs P24 →

• J69— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of aspiration pneumonia NOS adds J69; it is not part of this code and both may be reported when both are documented.

  Full comparison: J09-J18 vs J69 →

• P23.9— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of congenital pneumonia adds P23.9; it is not part of this code and both may be reported when both are documented.

  Full comparison: J09-J18 vs P23.9 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data

CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page

Change history and date-of-service validity Official source data

CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page

Comparisons, relationships and the contextual map MedCoder structured relationship

Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears

Summary and FAQ answers MedCoder explanation

Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Nearest Codes in This Family

Official ICD-10-CM classifications closest to J09-J18 in its code family, with their registry titles.

• J09 — Influenza due to certain identified influenza viruses
• J10 — Influenza due to other identified influenza virus
• J11 — Influenza due to unidentified influenza virus
• J12 — Viral pneumonia, not elsewhere classified
• J13 — Pneumonia due to Streptococcus pneumoniae
• J14 — Pneumonia due to Hemophilus influenzae
• J15 — Bacterial pneumonia, not elsewhere classified
• J16 — Pneumonia due to other infectious organisms, not elsewhere classified
• J17 — Pneumonia in diseases classified elsewhere
• J18 — Pneumonia, unspecified organism