M1A.46 – Other secondary chronic gout, knee
ICD-10-CM 2027 diagnosis code · Inflammatory polyarthropathies
- Code
M1A.46(claims format:M1A46)- Description
- Other secondary chronic gout, knee
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
- Block
- M05-M14 Inflammatory polyarthropathies
- Parent codes
- M1A › M1A.4
Billable codes under M1A.46
M1A.46 is a header code and cannot be used on claims. Choose the most specific code:
- M1A.461 – Other secondary chronic gout, right kneeHeader (more codes below)
- M1A.462 – Other secondary chronic gout, left kneeHeader (more codes below)
- M1A.469 – Other secondary chronic gout, unspecified kneeHeader (more codes below)
7th character values
Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).
| Character | Meaning |
|---|---|
0 | without tophus (tophi) |
1 | with tophus (tophi) |
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
M1A – Chronic gout
- gout NOS (M10.-)
- acute gout (M10.-)
- 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)
- The appropriate 7th character is to be added to each code from category M1A
M1A.4 – Other secondary chronic gout
- associated condition
Index terms for M1A.46
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in M1A.4
- M1A.40 – Other secondary chronic gout, unspecified siteHeader
- M1A.41 – Other secondary chronic gout, shoulderHeader
- M1A.42 – Other secondary chronic gout, elbowHeader
- M1A.43 – Other secondary chronic gout, wristHeader
- M1A.44 – Other secondary chronic gout, handHeader
- M1A.45 – Other secondary chronic gout, hipHeader
- M1A.47 – Other secondary chronic gout, ankle and footHeader
- M1A.48 – Other secondary chronic gout, vertebraeHeader
- M1A.49 – Other secondary chronic gout, multiple sitesHeader
Frequently asked questions
What is ICD-10 code M1A.46?
M1A.46 is the ICD-10-CM code for other secondary chronic gout, knee, in the block M05-M14 (Inflammatory polyarthropathies).
Is M1A.46 a billable code?
No. M1A.46 is a header code with more specific child codes; report one of the billable codes listed above.
What category does M1A.46 belong to?
It belongs to category M1A – Chronic gout.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.