ICD-10-CM Code For Myositis: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group M60 includes inflammatory myopathies and other specified disorders of skeletal muscle such as myositis, polymyositis, dermatomyositis, infectious myositis, and focal or multifocal myositis. These ICD-10-CM diagnosis codes are used to document presentations of muscle inflammation, weakness, pain, and related complications, capturing severity, distribution, and any infectious or systemic involvement. Accurate coding within the ICD-10-CM M60 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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ICD-10-CM M60: Myositis Overview

The ICD-10-CM M60 group includes inflammatory and other specified disorders of skeletal muscle that cause muscle pain, weakness, and dysfunction. These diagnoses target the musculoskeletal system, particularly skeletal muscles and their inflammatory conditions. Accurate coding matters for proper claim adjudication and to reflect the clinical complexity that affects treatment and resource use.

When to Use

Use a code from this group when clinical documentation indicates an inflammatory or specified muscle disorder such as polymyositis, dermatomyositis, or infectious myositis. Select the most specific code that reflects the etiology, anatomical site, and clinical complexity documented by the treating clinician.

ICD-10-CM Codes

111 rows

ICD-10-CM Code	Description
M60.000	Infective myositis, unspecified right arm
M60.001	Infective myositis, unspecified left arm
M60.002	Infective myositis, unspecified arm
M60.003	Infective myositis, unspecified right leg
M60.004	Infective myositis, unspecified left leg
M60.005	Infective myositis, unspecified leg
M60.009	Infective myositis, unspecified site
M60.011	Infective myositis, right shoulder
M60.012	Infective myositis, left shoulder
M60.019	Infective myositis, unspecified shoulder
M60.021	Infective myositis, right upper arm
M60.022	Infective myositis, left upper arm
M60.029	Infective myositis, unspecified upper arm
M60.031	Infective myositis, right forearm
M60.032	Infective myositis, left forearm
M60.039	Infective myositis, unspecified forearm
M60.041	Infective myositis, right hand
M60.042	Infective myositis, left hand
M60.043	Infective myositis, unspecified hand
M60.044	Infective myositis, right finger(s)

Showing 1–20 of 111

DRG Codes

4 rows

DRG Code	Description
555	Signs and Symptoms of Musculoskeletal System and Connective Tissue with MCC
556	Signs and Symptoms of Musculoskeletal System and Connective Tissue without MCC
557	Tendonitis, Myositis and Bursitis with MCC
558	Tendonitis, Myositis and Bursitis without MCC

Typical Clinical Scenarios

An adult presents to the emergency department with acute onset severe thigh and shoulder muscle pain, swelling, and painful weakness after a recent influenza-like illness; labs show markedly elevated creatine kinase and myoglobinuria raising concern for rhabdomyolysis. A myositic inflammatory process is suspected as the primary cause of the acute muscle inflammation and necrosis, so an acute myositis code from this group would be assigned to capture the active inflammatory muscle disorder. Typical codes: M60.00, M60.01.
A middle-aged patient in outpatient rheumatology has progressive, symmetric proximal muscle weakness over months with elevated muscle enzymes and biopsy-confirmed chronic inflammatory myopathy; care focuses on long‑term immunosuppressive therapy and functional monitoring. Because this is a chronic inflammatory muscle disorder managed longitudinally, a chronic myositis code from the group is used to document the underlying muscle disease as the reason for ongoing treatment and follow‑up. Typical codes: M60.11, M60.12.
A hospitalized elderly patient with long-standing diabetes develops localized necrosis and secondary infection of an intrinsic hand muscle after pressure injury, with signs of purulent drainage and cellulitis; surgical drainage and cultures are performed. The treating team documents a secondary myositis of a specific muscle due to infection as a complication of the pressure wound, so a code from the group reflecting infectious/pyogenic involvement of a particular muscle is assigned alongside codes for the wound and infection. Typical codes: M60.05, M60.09.

ICD-10-CM Code For Calcification And Ossification Of Muscle: Group Overview

M62-OTHER-DISORDERS-OF-MUSCLE

ICD-10-CM Code For Other Disorders Of Muscle: Group Overview

M63-DISORDERS-OF-MUSCLE

ICD-10-CM Code For Disorders Of Muscle In Diseases Classified Elsewhere: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-CM Codes

111 rows

ICD-10-CM Code	Description
M60.000	Infective myositis, unspecified right arm
M60.001	Infective myositis, unspecified left arm
M60.002	Infective myositis, unspecified arm
M60.003	Infective myositis, unspecified right leg
M60.004	Infective myositis, unspecified left leg
M60.005	Infective myositis, unspecified leg
M60.009	Infective myositis, unspecified site
M60.011	Infective myositis, right shoulder
M60.012	Infective myositis, left shoulder
M60.019	Infective myositis, unspecified shoulder
M60.021	Infective myositis, right upper arm
M60.022	Infective myositis, left upper arm
M60.029	Infective myositis, unspecified upper arm
M60.031	Infective myositis, right forearm
M60.032	Infective myositis, left forearm
M60.039	Infective myositis, unspecified forearm
M60.041	Infective myositis, right hand
M60.042	Infective myositis, left hand
M60.043	Infective myositis, unspecified hand
M60.044	Infective myositis, right finger(s)

Showing 1–20 of 111

DRG Codes

4 rows

DRG Code	Description
555	Signs and Symptoms of Musculoskeletal System and Connective Tissue with MCC
556	Signs and Symptoms of Musculoskeletal System and Connective Tissue without MCC
557	Tendonitis, Myositis and Bursitis with MCC
558	Tendonitis, Myositis and Bursitis without MCC

Typical Clinical Scenarios

An adult presents to the emergency department with acute onset severe thigh and shoulder muscle pain, swelling, and painful weakness after a recent influenza-like illness; labs show markedly elevated creatine kinase and myoglobinuria raising concern for rhabdomyolysis. A myositic inflammatory process is suspected as the primary cause of the acute muscle inflammation and necrosis, so an acute myositis code from this group would be assigned to capture the active inflammatory muscle disorder. Typical codes: M60.00, M60.01.
A middle-aged patient in outpatient rheumatology has progressive, symmetric proximal muscle weakness over months with elevated muscle enzymes and biopsy-confirmed chronic inflammatory myopathy; care focuses on long‑term immunosuppressive therapy and functional monitoring. Because this is a chronic inflammatory muscle disorder managed longitudinally, a chronic myositis code from the group is used to document the underlying muscle disease as the reason for ongoing treatment and follow‑up. Typical codes: M60.11, M60.12.
A hospitalized elderly patient with long-standing diabetes develops localized necrosis and secondary infection of an intrinsic hand muscle after pressure injury, with signs of purulent drainage and cellulitis; surgical drainage and cultures are performed. The treating team documents a secondary myositis of a specific muscle due to infection as a complication of the pressure wound, so a code from the group reflecting infectious/pyogenic involvement of a particular muscle is assigned alongside codes for the wound and infection. Typical codes: M60.05, M60.09.

ICD-10-CM Code For Calcification And Ossification Of Muscle: Group Overview

M62-OTHER-DISORDERS-OF-MUSCLE

ICD-10-CM Code For Other Disorders Of Muscle: Group Overview

M63-DISORDERS-OF-MUSCLE

ICD-10-CM Code For Disorders Of Muscle In Diseases Classified Elsewhere: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-CM Code For Myositis: Group Overview

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ICD-10-CM M60: Myositis Overview

ICD-10-CM Code For Myositis: Group Overview

Sign up for ICD-10-CM Code For Myositis: Group Overview policy alerts

ICD-10-CM M60: Myositis Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

ICD-10-CM Code For Myositis: Group Overview

Sign up for ICD-10-CM Code For Myositis: Group Overview policy alerts

ICD-10-CM M60: Myositis Overview

ICD-10-CM Code For Myositis: Group Overview

Sign up for ICD-10-CM Code For Myositis: Group Overview policy alerts

ICD-10-CM M60: Myositis Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in the ICD-10-CM M60 group?

How are individual ICD-10-CM codes within M60 formatted for site specificity?

Are there codes for infectious versus interstitial myositis in M60?

Does M60 include codes for foreign body granuloma and other myositis types?

Which DRGs relate to M60 diagnoses for billing and reimbursement grouping?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in the ICD-10-CM M60 group?

How are individual ICD-10-CM codes within M60 formatted for site specificity?

Are there codes for infectious versus interstitial myositis in M60?

Does M60 include codes for foreign body granuloma and other myositis types?

Which DRGs relate to M60 diagnoses for billing and reimbursement grouping?

References