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ICD-10-CM 2027 diagnosis code

M08.439Pauciarticular juvenile rheumatoid arthritis, unspecified wrist

✓ Billable / specific

M08.439 is a valid, billable ICD-10-CM code for pauciarticular juvenile rheumatoid arthritis, unspecified wrist. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Pauciarticular juvenile rheumatoid arthritis, unsp wrist

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About M08.439

M08.439 is the ICD-10-CM diagnosis code for Pauciarticular juvenile rheumatoid arthritis, unspecified wrist. It belongs to category M08 (juvenile arthritis), block M05-M14 (inflammatory polyarthropathies) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within M08.43, choose M08.439 (unspecified wrist) only when documentation doesn't support a more specific option: right wrist (M08.431) and left wrist (M08.432).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 545 (Connective Tissue Disorders with MCC, relative weight 2.3892), DRG 546 (Connective Tissue Disorders with CC, relative weight 1.1745) and DRG 547 (Connective Tissue Disorders without CC/MCC, relative weight 0.7526), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 714.32 (Pauciarticular juvenile rheumatoid arthritis).

Notes that apply from higher levels

Instructions written at a parent level also apply to M08.439.

› From M08 Juvenile arthritis
Excludes1
  • arthropathy in Whipple's disease (M14.8)
  • Felty's syndrome (M05.0)
  • juvenile dermatomyositis (M33.0-)
  • psoriatic juvenile arthropathy (L40.54)
Code also
  • any associated underlying condition, such as:
  • regional enteritis [Crohn's disease] (K50.-)
  • ulcerative colitis (K51.-)

Broader instructions also apply from Chapter 13: Diseases of the musculoskeletal system and connective tissue.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 714.32Pauciarticular juvenile rheumatoid arthritisapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about M08.439

Is M08.439 billable?

Yes. M08.439 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can M08.439 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict M08.439 as a principal diagnosis.

Is M08.439 a CC or MCC?

No. M08.439 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does M08.439 group to?

M08.439 is used in the MS-DRG v44.0 logic for MS-DRG 545 (Connective Tissue Disorders with MCC), MS-DRG 546 (Connective Tissue Disorders with CC) and MS-DRG 547 (Connective Tissue Disorders without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for M08.439?

The CMS General Equivalence Mappings map M08.439 to ICD-9-CM 714.32.