M ICD-10-CM Categories: Category Index
Browse 79 top-level ICD-10-CM categories beginning with M, then follow their complete FY 2027 child-code hierarchies.
Categories beginning with M
Open a category to continue through its complete hierarchy of more specific codes.
M00Pyogenic arthritisM01Direct infections of joint in infectious and parasitic diseases classified elsewhereM02Postinfective and reactive arthropathiesM04Autoinflammatory syndromesM05Rheumatoid arthritis with rheumatoid factorM06Other rheumatoid arthritisM07Enteropathic arthropathiesM08Juvenile arthritisM10GoutM11Other crystal arthropathiesM12Other and unspecified arthropathyM13Other arthritisM14Arthropathies in other diseases classified elsewhereM15PolyosteoarthritisM16Osteoarthritis of hipM17Osteoarthritis of kneeM18Osteoarthritis of first carpometacarpal jointM19Other and unspecified osteoarthritisM1AChronic goutM20Acquired deformities of fingers and toesM21Other acquired deformities of limbsM22Disorder of patellaM23Internal derangement of kneeM24Other specific joint derangementsM25Other joint disorder, not elsewhere classifiedM26Dentofacial anomalies [including malocclusion]M27Other diseases of jawsM30Polyarteritis nodosa and related conditionsM31Other necrotizing vasculopathiesM32Systemic lupus erythematosus (SLE)M33DermatopolymyositisM34Systemic sclerosis [scleroderma]M35Other systemic involvement of connective tissueM36Systemic disorders of connective tissue in diseases classified elsewhereM40Kyphosis and lordosisM41ScoliosisM42Spinal osteochondrosisM43Other deforming dorsopathiesM45Ankylosing spondylitisM46Other inflammatory spondylopathiesM47SpondylosisM48Other spondylopathiesM49Spondylopathies in diseases classified elsewhereM50Cervical disc disordersM51Thoracic, thoracolumbar, and lumbosacral intervertebral disc disordersM53Other and unspecified dorsopathies, not elsewhere classifiedM54DorsalgiaM60MyositisM61Calcification and ossification of muscleM62Other disorders of muscleM63Disorders of muscle in diseases classified elsewhereM65Synovitis and tenosynovitisM66Spontaneous rupture of synovium and tendonM67Other disorders of synovium and tendonM70Soft tissue disorders related to use, overuse and pressureM71Other bursopathiesM72Fibroblastic disordersM75Shoulder lesionsM76Enthesopathies, lower limb, excluding footM77Other enthesopathiesM79Other and unspecified soft tissue disorders, not elsewhere classifiedM80Osteoporosis with current pathological fractureM81Osteoporosis without current pathological fractureM83Adult osteomalaciaM84Disorder of continuity of boneM85Other disorders of bone density and structureM86OsteomyelitisM87OsteonecrosisM88Osteitis deformans [Paget's disease of bone]M89Other disorders of boneM90Osteopathies in diseases classified elsewhereM91Juvenile osteochondrosis of hip and pelvisM92Other juvenile osteochondrosisM93Other osteochondropathiesM94Other disorders of cartilageM95Other acquired deformities of musculoskeletal system and connective tissueM96Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classifiedM97Periprosthetic fracture around internal prosthetic jointM99Biomechanical lesions, not elsewhere classifiedSource and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This category index is generated from Vero’s repository-backed ICD-10-CM hierarchy. Every listed category is a top-level record, and each linked category page exposes its direct child codes.
Frequently asked questions
Which ICD-10-CM categories begin with M?
This index lists 79 top-level categories beginning with M from Vero’s FY 2027 U.S. ICD-10-CM reference dataset.
How do I find a more specific M code?
Open a category below, then follow its linked child-code hierarchy until you reach the code supported by the documentation.
Which ICD-10-CM release does this M index use?
The index uses the FY 2027 U.S. ICD-10-CM release and the repository-backed hierarchy displayed on each linked code page.
Is every M category billable?
No. These are top-level categories used for navigation. Follow the hierarchy to a sufficiently specific code and confirm the active code set, official guidance, and payer requirements.