M1A.2391 — Drug-induced chronic gout, unspecified wrist, with tophus (tophi)
Is M1A.2391 billable?
Yes, but M1A.2391 is an unspecified code. M1A.2391 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, M1A.2391 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting M1A.2391 — the more specific alternatives are listed below.
M1A.2391 at a glance
| Code | M1A.2391 |
|---|---|
| Description | Drug-induced chronic gout, unspecified wrist, with tophus (tophi) |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "1" | with tophus (tophi) |
What does the 7th character "1" mean in M1A.2391?
In M1A.2391, the 7th character 1 means with tophus (tophi). The 7th character is required for M1A.2391 to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does M1A.2391 group to?
M1A.2391 sits in MDC 08 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.
- 553Bone Diseases and Arthropathies with MCCmedical
- 554Bone Diseases and Arthropathies without MCCmedical
How is M1A.2391 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under M1A.23, the nearest indexed parent of M1A.2391. Use them to find the family, then select the specific code.
- Gout, chronic › drug-induced › wrist
Excludes1 — never code together — inherited from M1A
The conditions below can never be reported together with M1A.2391 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- gout NOS (M10.-)
Use additional code — inherited from M1A
Report an additional code alongside M1A.2391 to fully describe the condition. M1A.2391 is sequenced first.
- code to identify:
- Autonomic neuropathy in diseases classified elsewhere (G99.0)
- Calculus of urinary tract in diseases classified elsewhere (N22)
- Cardiomyopathy in diseases classified elsewhere (I43)
- Disorders of external ear in diseases classified elsewhere (H61.1-, H62.8-)
- Disorders of iris and ciliary body in diseases classified elsewhere (H22)
- Glomerular disorders in diseases classified elsewhere (N08)
Use additional code — inherited from M1A.2
Report an additional code alongside M1A.2391 to fully describe the condition. M1A.2391 is sequenced first.
- code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M1A.2391, but a patient may have both at the same time. When documentation supports it, M1A.2391 and the excluded code may both be reported.
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Excludes2 — not included here — inherited from M1A
The conditions below are not part of M1A.2391, but a patient may have both at the same time. When documentation supports it, M1A.2391 and the excluded code may both be reported.
- acute gout (M10.-)
How long has M1A.2391 existed?
M1A.2391 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.