M1A.0691: Idiopathic chronic gout, unspecified knee, with tophus (tophi)
M1A.0691 is the billable ICD-10-CM diagnosis code for Idiopathic chronic gout, unspecified knee, with tophus (tophi). It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code M1A.0691?
M1A.0691 is the ICD-10-CM diagnosis code for Idiopathic chronic gout, unspecified knee, with tophus (tophi). It belongs to category M1A (Chronic gout).
Is M1A.0691 a billable code?
Yes. M1A.0691 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does M1A.0691 belong to?
M1A.0691 is part of ICD-10-CM category M1A — Chronic gout, which has 484 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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