Convert ICD-10 A09 to ICD-9

ICD-10 code A09, Infectious gastroenteritis and colitis, unspecified, crosswalked to ICD-9 with the official CMS General Equivalence Mappings. Convert another code below.

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Official CMS General Equivalence Mappings Final GEMs release (FY 2018) Maps in both directions

3 candidate ICD-9 mappings for ICD-10 A09

From the official CMS General Equivalence Mappings. Review each mapping's flags before selecting the final code. Convert another code

ICD-10 code A09, "Infectious gastroenteritis and colitis, unspecified", maps to ICD-9 code 009.0, "Infectious enteritis NOS". The mapping is flagged approximate: it is the closest available equivalent, not an exact match, so review the clinical documentation when selecting the final code. The GEMs list 3 candidate mappings for this code. The crosswalk comes from the official CMS General Equivalence Mappings.

ICD‑10 Code

A09

Infectious gastroenteritis and colitis, unspecified

ICD‑9 Code

009.0

Infectious enteritis NOS

Approximate Flag – This ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option and may not fully capture the original diagnosis.

ICD‑10 Code

G40.A09

Absence epileptic syndrome, not intractable, w/o stat epi

ICD‑9 Code

345.00

Gen noncv ep w/o intr ep

Approximate Flag – This ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option and may not fully capture the original diagnosis.

ICD‑10 Code

G40.A09

Absence epileptic syndrome, not intractable, w/o stat epi

ICD‑9 Code

345.2

Petit mal status

Approximate Flag – This ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option and may not fully capture the original diagnosis.

See everything about the source code, including its category, synonyms, and history: open the A09 code page → Or run the reverse crosswalk: convert 009.0 back to ICD-10 →