Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)
This chapter of the ICD-10-CM classification covers diagnosis codes from M00 through M99. Browse the sections below to find specific diagnosis codes within this chapter.
Chapter Notes
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Excludes2 (not included here):
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Sections
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M00-M02 Infectious arthropathies (M00-M02)325 codes
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M00-M25 Arthropathies (M00-M25)
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M04 Autoinflammatory syndromes (M04)5 codes
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M05-M14 Inflammatory polyarthropathies (M05-M14)1426 codes
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M15-M19 Osteoarthritis (M15-M19)130 codes
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M20-M25 Other joint disorders (M20-M25)963 codes
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M26-M27 Dentofacial anomalies [including malocclusion] and other disorders of jaw (M26-M27)115 codes
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M30-M36 Systemic connective tissue disorders (M30-M36)101 codes
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M40-M43 Deforming dorsopathies (M40-M43)187 codes
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M40-M54 Dorsopathies (M40-M54)
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M45-M49 Spondylopathies (M45-M49)241 codes
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M50-M54 Other dorsopathies (M50-M54)167 codes
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M60-M63 Disorders of muscles (M60-M63)556 codes
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M60-M79 Soft tissue disorders (M60-M79)
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M65-M67 Disorders of synovium and tendon (M65-M67)497 codes
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M70-M79 Other soft tissue disorders (M70-M79)477 codes
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M80-M85 Disorders of bone density and structure (M80-M85)533 codes
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M80-M94 Osteopathies and chondropathies (M80-M94)
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M86-M90 Other osteopathies (M86-M90)915 codes
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M91-M94 Chondropathies (M91-M94)283 codes
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M95 Other disorders of the musculoskeletal system and connective tissue (M95)12 codes
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M96 Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified (M96)48 codes
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M97 Periprosthetic fracture around internal prosthetic joint (M97)18 codes
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M99 Biomechanical lesions, not elsewhere classified (M99)101 codes
Top-Level Codes in This Chapter
- M00 Pyogenic arthritis
- M01 Direct infections of joint in infectious and parasitic diseases classified elsewhere
- M02 Postinfective and reactive arthropathies
- M04 Autoinflammatory syndromes
- M05 Rheumatoid arthritis with rheumatoid factor
- M06 Other rheumatoid arthritis
- M07 Enteropathic arthropathies
- M08 Juvenile arthritis
- M10 Gout
- M11 Other crystal arthropathies
- M12 Other and unspecified arthropathy
- M13 Other arthritis
- M14 Arthropathies in other diseases classified elsewhere
- M15 Polyosteoarthritis
- M16 Osteoarthritis of hip
- M17 Osteoarthritis of knee
- M18 Osteoarthritis of first carpometacarpal joint
- M19 Other and unspecified osteoarthritis
- M1A Chronic gout
- M20 Acquired deformities of fingers and toes
- M21 Other acquired deformities of limbs
- M22 Disorder of patella
- M23 Internal derangement of knee
- M24 Other specific joint derangements
- M25 Other joint disorder, not elsewhere classified
- M26 Dentofacial anomalies [including malocclusion]
- M27 Other diseases of jaws
- M30 Polyarteritis nodosa and related conditions
- M31 Other necrotizing vasculopathies
- M32 Systemic lupus erythematosus (SLE)
- M33 Dermatopolymyositis
- M34 Systemic sclerosis [scleroderma]
- M35 Other systemic involvement of connective tissue
- M36 Systemic disorders of connective tissue in diseases classified elsewhere
- M40 Kyphosis and lordosis
- M41 Scoliosis
- M42 Spinal osteochondrosis
- M43 Other deforming dorsopathies
- M45 Ankylosing spondylitis
- M46 Other inflammatory spondylopathies
- M47 Spondylosis
- M48 Other spondylopathies
- M49 Spondylopathies in diseases classified elsewhere
- M50 Cervical disc disorders
- M51 Thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders
- M53 Other and unspecified dorsopathies, not elsewhere classified
- M54 Dorsalgia
- M60 Myositis
- M61 Calcification and ossification of muscle
- M62 Other disorders of muscle
- M63 Disorders of muscle in diseases classified elsewhere
- M65 Synovitis and tenosynovitis
- M66 Spontaneous rupture of synovium and tendon
- M67 Other disorders of synovium and tendon
- M70 Soft tissue disorders related to use, overuse and pressure
- M71 Other bursopathies
- M72 Fibroblastic disorders
- M75 Shoulder lesions
- M76 Enthesopathies, lower limb, excluding foot
- M77 Other enthesopathies
- M79 Other and unspecified soft tissue disorders, not elsewhere classified
- M80 Osteoporosis with current pathological fracture
- M81 Osteoporosis without current pathological fracture
- M83 Adult osteomalacia
- M84 Disorder of continuity of bone
- M85 Other disorders of bone density and structure
- M86 Osteomyelitis
- M87 Osteonecrosis
- M88 Osteitis deformans [Paget's disease of bone]
- M89 Other disorders of bone
- M90 Osteopathies in diseases classified elsewhere
- M91 Juvenile osteochondrosis of hip and pelvis
- M92 Other juvenile osteochondrosis
- M93 Other osteochondropathies
- M94 Other disorders of cartilage
- M95 Other acquired deformities of musculoskeletal system and connective tissue
- M96 Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified
- M97 Periprosthetic fracture around internal prosthetic joint
- M99 Biomechanical lesions, not elsewhere classified
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