A74.0 — Chlamydial conjunctivitis
Is A74.0 billable?
Yes — A74.0 is billable for FY2027. A74.0 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. A74.0 may be submitted for encounters from October 1, 2026 through September 30, 2027.
A74.0 at a glance
| Code | A74.0 |
|---|---|
| Description | Chlamydial conjunctivitis |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does A74.0 group to?
A74.0 sits in MDC 02 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 124Other Disorders of the Eye with MCC or Thrombolytic Agentmedical
- 125Other Disorders of the Eye without MCCmedical
How is A74.0 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to A74.0. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Paratrachoma
- Chlamydia, chlamydial › conjunctivitis
- ConjunctivitisNOS › chlamydial (staphylococcal) (streptococcal)
- ConjunctivitisNOS › inclusion (staphylococcal) (streptococcal)
- ConjunctivitisNOS › in › Chlamydia (staphylococcal) (streptococcal)
- Disease, diseased › conjunctiva › chlamydial
Inclusion terms
Alternative wording in documentation that is classified to A74.0.
- Paratrachoma
Excludes1 — never code together — inherited from A70-A74
The conditions below can never be reported together with A74.0 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- sexually transmitted chlamydial diseases (A55-A56)
Excludes1 — never code together — inherited from A74
The conditions below can never be reported together with A74.0 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Use additional code — inherited from Chapter 1
Report an additional code alongside A74.0 to fully describe the condition. A74.0 is sequenced first.
- code to identify resistance to antimicrobial drugs (Z16.-)
Excludes2 — not included here — inherited from Chapter 1
The conditions below are not part of A74.0, but a patient may have both at the same time. When documentation supports it, A74.0 and the excluded code may both be reported.
- 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)
Excludes2 — not included here — inherited from A74
The conditions below are not part of A74.0, but a patient may have both at the same time. When documentation supports it, A74.0 and the excluded code may both be reported.
- chlamydial pneumonia (J16.0)
How long has A74.0 existed?
A74.0 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.