Coding and coverage · ICD-10-CM
Instructional notes
Chapter 1
Excludes2Not included here: the patient may have both; report both when both are present.
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
Use additional codeAdd a second code for the full picture.
- code to identify resistance to antimicrobial drugs (Z16.-)
Includes
- diseases generally recognized as communicable or transmissible
Section A50-A64
Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
Excludes2Not included here: the patient may have both; report both when both are present.
- human immunodeficiency virus [HIV] disease (B20)
This code
Inclusion terms
- Late syphilitic chorioretinitis
- Late syphilitic episcleritis
Chapter 1: Certain infectious and parasitic diseases · A50-A64 Infections with a predominantly sexual mode of transmission (A50-A64)
Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.
Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.