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ICD-10-CM 2027 diagnosis code

M62.85Dysfunction of the multifidus muscles, lumbar region

✓ Billable / specific

M62.85 is a valid, billable ICD-10-CM code for dysfunction of the multifidus muscles, lumbar region. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2025 (effective October 1, 2024). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About M62.85

M62.85 is the ICD-10-CM diagnosis code for dysfunction of the multifidus muscles, lumbar region. It belongs to category M62 (other disorders of muscle), block M60-M63 (disorders of muscles) 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 M62.8 (other specified disorders of muscle), M62.85 is specifically for dysfunction of the multifidus muscles, lumbar region. Related codes cover muscle weakness (generalized) (M62.81), Rhabdomyolysis (M62.82), muscle spasm (M62.83), Sarcopenia (M62.84) and other specified disorders of muscle (M62.89).

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 557 (Tendonitis, Myositis and Bursitis with MCC, relative weight 1.489) and DRG 558 (Tendonitis, Myositis and Bursitis without MCC, relative weight 0.8875), 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 was added in FY2025, effective October 1, 2024.

Notes that apply from higher levels

Instructions written at a parent level also apply to M62.85.

› From M62.8 Other specified disorders of muscle
Excludes2
  • nontraumatic hematoma of muscle (M79.81)
› From M62 Other disorders of muscle
Excludes1
Excludes2
  • nontraumatic hematoma of muscle (M79.81)

Broader instructions also apply from M60-M63 Disorders of muscles and Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to M62.85.

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.

MDC 08 · Diseases and Disorders of the Musculoskeletal System and Connective Tissue

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
  • FY2025 (effective 10/1/2024): Added
  • No changes since FY2025.

Common questions about M62.85

Is M62.85 billable?

Yes. M62.85 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can M62.85 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict M62.85 as a principal diagnosis.

Is M62.85 a CC or MCC?

No. M62.85 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does M62.85 group to?

M62.85 is used in the MS-DRG v44.0 logic for MS-DRG 557 (Tendonitis, Myositis and Bursitis with MCC) and MS-DRG 558 (Tendonitis, Myositis and Bursitis without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.