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Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue

ICD-10-CM codes M00-M99

Includes back pain, osteoarthritis, rheumatoid arthritis, osteoporosis, gout, disc disorders, tendinitis, and connective tissue diseases like lupus. Low back pain (M54.5) and knee osteoarthritis (M17) are among the most frequently coded conditions in outpatient medicine.

M00-M02

Infectious Arthropathies

M04-M04

Autoinflammatory Syndromes

M05-M14

Inflammatory Polyarthropathies

M15-M19

Osteoarthritis

M20-M25

Other Joint Disorders

M26-M27

Dentofacial Anomalies and Other Disorders of Jaw

M30-M36

Systemic Connective Tissue Disorders

M40-M43

Deforming Dorsopathies

M45-M49

Spondylopathies

M50-M54

Other Dorsopathies

M60-M63

Disorders of Muscles

M65-M67

Disorders of Synovium and Tendon

M70-M79

Other Soft Tissue Disorders

M80-M85

Disorders of Bone Density and Structure

M86-M90

Other Osteopathies

M91-M94

Chondropathies

M95-M95

Other Disorders of the Musculoskeletal System

M96-M96

Intraoperative and Postprocedural Complications of Musculoskeletal System

M97-M97

Periprosthetic Fracture Around Internal Prosthetic Joint

M99-M99

Biomechanical Lesions

Frequently Asked Questions

What ICD-10 codes are in Chapter 13?

Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue covers ICD-10-CM codes M00-M99. It contains 20 code blocks with 78 top-level categories.

What conditions does ICD-10 Chapter 13 cover?

Includes back pain, osteoarthritis, rheumatoid arthritis, osteoporosis, gout, disc disorders, tendinitis, and connective tissue diseases like lupus. Low back pain (M54.5) and knee osteoarthritis (M17) are among the most frequently coded conditions in outpatient medicine. This chapter includes codes from M00-M99.

How many code blocks are in Chapter 13?

Chapter 13 has 20 code blocks: M00-M02 (Infectious Arthropathies), M04-M04 (Autoinflammatory Syndromes), M05-M14 (Inflammatory Polyarthropathies), M15-M19 (Osteoarthritis), and 16 more.

Is there an ICD-11 equivalent of ICD-10 Chapter 13?

ICD-11 reorganizes many chapters compared to ICD-10. Some conditions in Chapter 13 may appear in different ICD-11 chapters. Use the ICD-10 to ICD-11 converter to find specific code equivalents.

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