ICD-10-CM 2027
ICD-10 code for chlamydial vulvitis
From the official ICD-10-CM alphabetic index entry “Vulvitis (acute) (allergic) (atrophic) (hypertrophic) (intertriginous) (senile) › chlamydial”. Page updated September 29, 2026.
About coding chlamydial vulvitis
The ICD-10-CM code for chlamydial vulvitis is A56.02 (Chlamydial vulvovaginitis).
Within A56.0 (chlamydial infection of lower genitourinary tract), A56.02 is specifically for chlamydial vulvovaginitis. Related codes cover unspecified (A56.00), chlamydial cystitis and urethritis (A56.01) and other chlamydial infection of lower genitourinary tract (A56.09).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 742 (Uterine and Adnexa Procedures for Non-Malignancy with CC/MCC, relative weight 1.8456), DRG 743 (Uterine and Adnexa Procedures for Non-Malignancy without CC/MCC, relative weight 1.2974), DRG 757 (Infections, Female Reproductive System with MCC, relative weight 1.4649), DRG 758 (Infections, Female Reproductive System with CC, relative weight 0.9908) and DRG 759 (Infections, Female Reproductive System without CC/MCC, relative weight 0.7691), in MDC 13 (Diseases and Disorders of the Female Reproductive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about chlamydial vulvitis ICD-10 codes
What is the ICD-10 code for chlamydial vulvitis?
- A56.02 — Chlamydial vulvovaginitis.
Is A56.02 billable?
- Yes. A56.02 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A56.02 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A56.02 as a principal diagnosis.
Is A56.02 a CC or MCC?
- No. A56.02 is neither a CC nor an MCC under MS-DRG v44.0.