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M1A.4Non-billableSave

M1A.4 - Other secondary chronic gout

ICD-10-CM Chapter 13: Diseases of the musculoskeletal system and connective tissue · M05-M14 Inflammatory polyarthropathies (M05-M14) · Subcategory of M1A · FY2027

Coding Guidance

M1A.4 is a non-billable heading. Report one of the 10 more specific codes below.

7th Character

The appropriate 7th character is to be added to each code from category M1A

  • 0without tophus (tophi)
  • 1with tophus (tophi)

Includes, Excludes and Coding Notes

Code FirstFrom M1A.4

Sequence the underlying condition before this code.

  • associated condition
Excludes 1 — Not Coded HereFrom M1A

Mutually exclusive: these conditions are never reported together with this code.

  • gout NOS (M10.-)
Excludes 2 — Not Included HereFrom M1A

Not part of this code; report both codes when the patient has both conditions.

  • acute gout (M10.-)
Use Additional CodeFrom M1A

Add a secondary code to identify the associated condition or cause when it is documented.

  • 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)
Excludes 2 — Not Included HereFrom Chapter M00-M99

Not part of this code; report both codes when the patient has both conditions.

  • 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)
NotesFrom Chapter M00-M99

Instructional notes from the ICD-10-CM tabular list.

  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

More Specific Codes (10)

M1A.40Other secondary chronic gout, unspecified site→M1A.41Other secondary chronic gout, shoulder→M1A.42Other secondary chronic gout, elbow→M1A.43Other secondary chronic gout, wrist→M1A.44Other secondary chronic gout, hand→M1A.45Other secondary chronic gout, hip→M1A.46Other secondary chronic gout, knee→M1A.47Other secondary chronic gout, ankle and foot→M1A.48Other secondary chronic gout, vertebrae→M1A.49Other secondary chronic gout, multiple sites→

Related condition guides

Documentation requirements, coding pitfalls and FAQs for conditions coded with M1A.4.