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M62.58 ICD-10-CM Code: Muscle wasting and atrophy, not elsewhere classified, other site

ICD-10-CM Code View

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FY 2026 Apr update / Diseases of the musculoskeletal system and connective tissue (M00-M99) / Disorders of muscles (M60-M63)

M62.58

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Muscle wasting and atrophy, not elsewhere classified, other site

Loss of muscle mass and strength occurring in body areas not covered by other specific muscle wasting codes.

CMS-HCC V28

N/A

Not mapped

CMS-HCC V24

N/A

Not mapped

ACA/HHS

N/A

Not mapped

ESRD/PACE

N/A

Not mapped

RXHCC

N/A

Not mapped

Code Book Path

Official
M62Other disorders of muscle
M62.5Muscle wasting and atrophy, not elsewhere classified
M62.58Muscle wasting and atrophy, not elsewhere classified, other site

Inclusion Terms

Official
  • Disuse atrophy NEC

Excludes 2

Official
  • pelvic muscle wasting (N81.84)

Related Child Codes

Official
M62.50Muscle wasting and atrophy, not elsewhere classified, unspecified site
M62.51Muscle wasting and atrophy, not elsewhere classified, shoulder
M62.52Muscle wasting and atrophy, not elsewhere classified, upper arm
M62.53Muscle wasting and atrophy, not elsewhere classified, forearm
M62.54Muscle wasting and atrophy, not elsewhere classified, hand

Includes

Official

ICD-10-CM does not list Includes notes for M62.58 in this effective period.

Excludes 1

Official
  • neuralgic amyotrophy (G54.5)
  • progressive muscular atrophy (G12.21)
  • sarcopenia (M62.84)

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for M62.58 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for M62.58 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for M62.58 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance
Document the specific anatomical site in the medical record for clarity
Use this code for unusual or multiple non-standard locations

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is M62.58 an HCC code?

No. M62.58 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.

Code
M62.58
Description
Muscle wasting and atrophy, not elsewhere classified, other site
HCC (V28)
No CMS-HCC V28 mapping
RAF
Billable
Yes
Payment year
2026

Coder workflow notes

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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

M62.58 is the ICD-10-CM diagnosis code for muscle wasting and atrophy, not elsewhere classified, other site. Loss of muscle mass and strength occurring in body areas not covered by other specific muscle wasting codes. M62.58 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering disorders of muscles (m60-m63).

M62.58 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

Document the specific anatomical site in the medical record for clarity.

HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M62.58 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

  • Document the specific anatomical site in the medical record for clarity
  • Use this code for unusual or multiple non-standard locations

Child Codes

Code Hierarchy

Work M62.58 in HCC Buddy

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