M1A — Chronic gout

Not billable

Is M1A billable?

No — M1A is a non-billable header code. M1A groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 60 billable codes beneath M1A.

Billable codes under this header

M1A at a glance

Code	M1A
Description	Chronic gout
Billable	No — header code
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Excludes1 — never code together

The conditions below can never be reported together with M1A 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

Report an additional code alongside M1A to fully describe the condition. M1A 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)

Excludes2 — not included here

The conditions below are not part of M1A, but a patient may have both at the same time. When documentation supports it, M1A and the excluded code may both be reported.

acute gout (M10.-)

Excludes2 — not included here — inherited from Chapter 13

The conditions below are not part of M1A, but a patient may have both at the same time. When documentation supports it, M1A 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)

What codes fall under M1A? (6)

How long has M1A existed?

M1A 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.