A56.01 is the authoritative medical code for Chlamydial cystitis and urethritis. This classification is used in medical billing and clinical recording to specify the clinical criteria for chlamydial cystitis and urethritis (ICD-10-CM A56.01), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Chlamydial cystitis and urethritis is a billable ICD-10-CM diagnosis code A56.01. Includes: sexually transmitted diseases due to Chlamydia; trachomatis. Excludes1 (not coded here): neonatal chlamydial conjunctivitis P39.1; neonatal chlamydial pneumonia P23.1; nonspecific and nongonococcal urethritis N34.1; Reiter's disease M02.3-. Excludes2 (not included here): chlamydial lymphogranuloma A55; conditions classified to A74.-; human immunodeficiency virus HIV disease B20.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for A56.01 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- sexually transmitted diseases due to Chlamydia
- trachomatis
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- neonatal chlamydial conjunctivitis P39.1
- neonatal chlamydial pneumonia P23.1
- nonspecific and nongonococcal urethritis N34.1
- Reiter's disease M02.3-
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- chlamydial lymphogranuloma A55
- conditions classified to A74.-
- human immunodeficiency virus HIV disease B20
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with A56.01?
Per Excludes1 instructions, A56.01 must not be reported with: neonatal chlamydial conjunctivitis (P39.1); neonatal chlamydial pneumonia (P23.1); nonspecific and nongonococcal urethritis (N34.1); Reiter's disease (M02.3-).
Can A56.01 be reported alongside related conditions?
Per Excludes2 instructions, A56.01 and the following may both be reported when both are present: chlamydial lymphogranuloma (A55); conditions classified to A74.-; human immunodeficiency virus [HIV] disease (B20).
Codes in This Family (12)
Official ICD-10-CM classifications in the same code family as A56.01, with their registry titles.
- A56 — Other sexually transmitted chlamydial diseases
- A56.0 — Chlamydial infection of lower genitourinary tract
- A56.00 — Chlamydial infection of lower genitourinary tract, unspecified
- A56.02 — Chlamydial vulvovaginitis
- A56.09 — Other chlamydial infection of lower genitourinary tract
- A56.1 — Chlamydial infection of pelviperitoneum and other genitourinary organs
- A56.11 — Chlamydial female pelvic inflammatory disease
- A56.19 — Other chlamydial genitourinary infection
- A56.2 — Chlamydial infection of genitourinary tract, unspecified
- A56.3 — Chlamydial infection of anus and rectum
- A56.4 — Chlamydial infection of pharynx
- A56.8 — Sexually transmitted chlamydial infection of other sites
Indexed Clinical Terms (4)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Chlamydia, chlamydial, cystitis
- Chlamydia, chlamydial, urethritis
- Cystitis (exudative) (hemorrhagic) (septic) (suppurative), chlamydial
- Urethritis (anterior) (posterior), chlamydial
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: