ICD-10-CM
ICD-10 code for Polyarthritis: M13.0
The ICD-10-CM index points "Polyarthritis" to M13 (Other arthritis), a header that is not billable. When nothing more specific is documented, the billable code is M13.0, Polyarthritis, unspecified.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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Index subterms
A header groups codes and is not billed. A billable code is one you can report.
More specific codes in M13
A header groups codes and is not billed. A billable code is one you can report.
- M13Other arthritisHeader
- M13.0Polyarthritis, unspecifiedBillable
- M13.1Monoarthritis, not elsewhere classifiedHeader
- M13.10Monoarthritis, not elsewhere classified, unspecified siteBillable
- M13.11Monoarthritis, not elsewhere classified, shoulderHeader
- M13.12Monoarthritis, not elsewhere classified, elbowHeader
- M13.13Monoarthritis, not elsewhere classified, wristHeader
- M13.14Monoarthritis, not elsewhere classified, handHeader
- M13.15Monoarthritis, not elsewhere classified, hipHeader
- M13.16Monoarthritis, not elsewhere classified, kneeHeader
- M13.17Monoarthritis, not elsewhere classified, ankle and footHeader
- M13.8Other specified arthritisHeader
- M13.80Other specified arthritis, unspecified siteBillable
- M13.81Other specified arthritis, shoulderHeader
- M13.82Other specified arthritis, elbowHeader
- M13.83Other specified arthritis, wristHeader
- M13.84Other specified arthritis, handHeader
- M13.85Other specified arthritis, hipHeader
- M13.86Other specified arthritis, kneeHeader
- M13.87Other specified arthritis, ankle and footHeader
- M13.88Other specified arthritis, other siteBillable
- M13.89Other specified arthritis, multiple sitesBillable
Excludes1
Excludes1 means these codes are not reported together.
From M13. A note on a category applies to every code under it.
Related conditions
Related pages
- M13.0 code detailsNotes, nearby codes, CMS-HCC group
- Category M13Every code under it
- Chapter 13Diseases of the musculoskeletal system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Polyarthritis?
The ICD-10-CM index points "Polyarthritis" to M13 (Other arthritis), a header that is not billable. When nothing more specific is documented, the billable code is M13.0, Polyarthritis, unspecified.
Is M13.0 billable?
Yes. M13.0 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to M13.0?
The CDC tabular list gives 2 Excludes1 notes (not coded together) for M13.0 and the categories above it. They are listed on this page.
What chapter is M13.0 in?
Chapter 13. Diseases of the musculoskeletal system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.