A56
⚠ Non-billable
Other sexually transmitted chlamydial diseases
ICD-10-CM · FY2026 · Certain Infectious and Parasitic Diseases
Code
A56
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Certain Infectious and Parasitic Diseases
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code A56?
ICD-10-CM code A56 represents Other sexually transmitted chlamydial diseases. It is a non-billable header code requiring a more specific subcategory in the Certain Infectious and Parasitic Diseases chapter, effective October 1, 2025 – September 30, 2026.
Is A56 billable?
No. A56 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is A56 in?
A56 belongs to the Certain Infectious and Parasitic Diseases chapter (A00–B99) of ICD-10-CM.
Related codes in the A56 category
A56.0
Chlamydial infection of lower genitourinary tract
Non-billable
A56.1
Chlamydial infection of pelviperitoneum and other genitourinary organs
Non-billable
A56.2
Chlamydial infection of genitourinary tract, unspecified
Billable
A56.3
Chlamydial infection of anus and rectum
Billable
A56.4
Chlamydial infection of pharynx
Billable
A56.8
Sexually transmitted chlamydial infection of other sites
Billable
A56.00
Chlamydial infection of lower genitourinary tract, unspecified
Billable
A56.01
Chlamydial cystitis and urethritis
Billable
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