2026 ICD-10-CM Diagnosis Code M1A.20X0Drug-induced chronic gout, unspecified site, without tophus (tophi)

ICD-10-CM Codes›M00–M99›M05-M14›M1A

ICD-10-CM M1A.20X0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M1A.20X0 is a billable ICD-10-CM diagnosis code for drug-induced chronic gout, unspecified site, without tophus (tophi). The 7th character 0 reports chronic gout without tophus formation. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 553 through 554. Coders also document this condition as chronic gout caused by drug. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Drug induced or toxic related condition and Gout.

Code Identity

ICD-10-CM Code
M1A.20X0
Billable Status
Yes — Valid for Submission
Code Describes
Drug-induced chronic gout, unspecified site, without tophus (tophi)
Short Description
Drug-induced chronic gout, unspecified site, without tophus
Parent Code
M1A.20
Drug-induced chronic gout, unspecified site

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM05-M14Inflammatory polyarthropathies
CategoryM1AChronic gout
This CodeM1A.20X0Drug-induced chronic gout, unspecified site, without tophus (tophi)

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chronic gout caused by drug
  • Chronic gout without tophus caused by drug

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ030
Drug induced or toxic related condition
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR MUS033
Gout
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Gout

Gout is a common type of inflammatory arthritis. It causes pain, swelling, and redness in one or more joints. It usually happens as a flare, which can last for a week or two and then gets better. The flares often begin in your big toe or a lower limb.

The full article covers:

  • What is gout?
  • What causes gout?
  • Who is more likely to develop gout?
  • What are the symptoms of gout?
  • How is gout diagnosed?
  • What are the treatments for gout?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert M1A.20X0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
274.02 Chr gouty atrph wo tophi
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M1A.20X0Overview

Is M1A.20X0 (Drug-induced chronic gout, unspecified site) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report drug-induced chronic gout, unspecified site, without tophus (tophi) on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character 0 in M1A.20X0 mean?

The final character 0 reports chronic gout without tophus formation, in this case involving the drug-induced chronic gout, unspecified site.

What MS-DRG does M1A.20X0 group to?

When drug-induced chronic gout, unspecified site, without tophus (tophi) is the principal diagnosis on an inpatient stay, it groups to MS-DRG 553, 554, with relative weights from 0.8301 to 1.2963 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M1A.20X0?

Under the General Equivalence Mappings, drug-induced chronic gout, unspecified site, without tophus (tophi) converts to ICD-9-CM 274.02 (chr gouty atrph wo tophi). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.