ICD-10-CM Excludes1 Notes · Chapter 13 · FY 2027 M00-M99

Excludes1 Notes in Chapter 13: Diseases of the musculoskeletal system and connective tissue ICD-10-CM

An Excludes1 note means "NOT CODED HERE": the excluded code should never be reported together with the code above the note. In Chapter 13 (M00-M99), notes printed in the chapter name other codes 359 times, and Excludes1 Notes anywhere in the Tabular List name the chapter’s codes 319 times, covering 201 distinct codes, categories and ranges. Switch views to read the list either way.

✓ From the official FY 2027 ICD-10-CM Tabular ListDefinitions follow the Official Guidelines, Section I.A
359
References in Its Notes
319
References to Its Codes
201
Chapter Codes Named
M00-M99
Chapter 13
Chapter 13

Excludes1 Notes by the code that carries the note

134 of 134 shown
  • M01 Direct infections of joint in infectious and parasitic diseases classified elsewhere applies to 24 codes
  • M02 Postinfective and reactive arthropathies applies to 121 codes
    • Behçet's disease (M35.2)
    • direct infections of joint in infectious and parasitic diseases classified elsewhere (M01.-)
    • postmeningococcal arthritis (A39.84)
    • mumps arthritis (B26.85)
    • rubella arthritis (B06.82)
    • syphilis arthritis (late) (A52.77)
    • rheumatic fever (I00)
    • tabetic arthropathy [Charcôt's] (A52.16)
  • M05 Rheumatoid arthritis with rheumatoid factor applies to 211 codes
    • rheumatic fever (I00)
    • juvenile rheumatoid arthritis (M08.-)
    • rheumatoid arthritis of spine (M45.-)
  • M06.1 Adult-onset Still's disease
  • M06.4 Inflammatory polyarthropathy
    • polyarthritis NOS (M13.0)
  • M07 Enteropathic arthropathies applies to 24 codes
    • psoriatic arthropathies (L40.5-)
  • M08 Juvenile arthritis applies to 125 codes
    • arthropathy in Whipple's disease (M14.8)
    • Felty's syndrome (M05.0)
    • juvenile dermatomyositis (M33.0-)
    • psoriatic juvenile arthropathy (L40.54)
  • M08.1 Juvenile ankylosing spondylitis
    • ankylosing spondylitis in adults (M45.0-)
  • M08.2 Juvenile rheumatoid arthritis with systemic onset applies to 25 codes
    • adult-onset Still's disease (M06.1-)
  • M08.9 Juvenile arthritis, unspecified applies to 25 codes
    • juvenile rheumatoid arthritis, unspecified (M08.0-)
  • M12 Other and unspecified arthropathy applies to 169 codes
  • M12.5 Traumatic arthropathy applies to 24 codes
    • post-traumatic osteoarthritis of first carpometacarpal joint (M18.2-M18.3)
    • post-traumatic osteoarthritis of hip (M16.4-M16.5)
    • post-traumatic osteoarthritis of knee (M17.2-M17.3)
    • post-traumatic osteoarthritis NOS (M19.1-)
    • post-traumatic osteoarthritis of other single joints (M19.1-)
  • M13 Other arthritis applies to 47 codes
  • M13.8 Other specified arthritis applies to 24 codes
  • M14 Arthropathies in other diseases classified elsewhere applies to 48 codes
    • diabetes mellitus (E08-E13 with .61-)
    • hematological disorders (M36.2-M36.3)
    • hypersensitivity reactions (M36.4)
    • neoplastic disease (M36.1)
    • neurosyphillis (A52.16)
    • sarcoidosis (D86.86)
    • enteropathic arthropathies (M07.-)
    • juvenile psoriatic arthropathy (L40.54)
    • lipoid dermatoarthritis (E78.81)
  • M14.6 Charcot's joint applies to 24 codes
    • Charcôt's joint in diabetes mellitus (E08-E13 with .610)
    • Charcôt's joint in tabes dorsalis (A52.16)
  • M15 Polyosteoarthritis applies to 7 codes
    • bilateral involvement of single joint (M16-M19)
  • M19 Other and unspecified osteoarthritis applies to 52 codes
  • M1A Chronic gout applies to 242 codes
  • M20 Acquired deformities of fingers and toes applies to 33 codes
    • acquired absence of fingers and toes (Z89.-)
    • congenital absence of fingers and toes (Q71.3-, Q72.3-)
    • congenital deformities and malformations of fingers and toes (Q66.-, Q68-Q70, Q74.-)
  • M20.0 Deformity of finger(s) applies to 15 codes
    • clubbing of fingers (R68.3)
    • palmar fascial fibromatosis [Dupuytren] (M72.0)
    • trigger finger (M65.3)
  • M21 Other acquired deformities of limbs applies to 124 codes
    • acquired absence of limb (Z89.-)
    • congenital absence of limbs (Q71-Q73)
    • congenital deformities and malformations of limbs (Q65-Q66, Q68-Q74)
  • M21.0 Valgus deformity, not elsewhere classified applies to 13 codes
    • metatarsus valgus (Q66.6)
    • talipes calcaneovalgus (Q66.4-)
  • M21.1 Varus deformity, not elsewhere classified applies to 13 codes
  • M21.4 Flat foot [pes planus] (acquired) applies to 3 codes
    • congenital pes planus (Q66.5-)
  • M21.5 Acquired clawhand, clubhand, clawfoot and clubfoot applies to 12 codes
    • clubfoot, not specified as acquired (Q66.89)
  • M23 Internal derangement of knee applies to 111 codes
  • M24.2 Disorder of ligament applies to 24 codes
    • familial ligamentous laxity (M35.7)
  • M24.3 Pathological dislocation of joint, not elsewhere classified applies to 26 codes
    • congenital dislocation or displacement of joint- see congenital malformations and deformations of the musculoskeletal system (Q65-Q79)
    • recurrent dislocation of joint (M24.4-)
  • M24.5 Contracture of joint applies to 26 codes
    • contracture of muscle without contracture of joint (M62.4-)
    • contracture of tendon (sheath) without contracture of joint (M62.4-)
    • Dupuytren's contracture (M72.0)
  • M24.6 Ankylosis of joint applies to 26 codes
    • stiffness of joint without ankylosis (M25.6-)
  • M25.0 Hemarthrosis applies to 26 codes
    • hemophilic arthropathy (M36.2)
  • M25.3 Other instability of joint applies to 26 codes
    • instability of joint secondary to old ligament injury (M24.2-)
    • instability of joint secondary to removal of joint prosthesis (M96.8-)
  • M25.4 Effusion of joint applies to 26 codes
    • hydrarthrosis in yaws (A66.6)
    • intermittent hydrarthrosis (M12.4-)
    • other infective (teno)synovitis (M65.1-)
  • M25.6 Stiffness of joint, not elsewhere classified applies to 26 codes
  • Block note Block M26-M27 Dentofacial anomalies [including malocclusion] and other disorders of jaw applies to 94 codes
    • hemifacial atrophy or hypertrophy (Q67.4)
    • unilateral condylar hyperplasia or hypoplasia (M27.8)
  • M26.0 Major anomalies of jaw size applies to 9 codes
  • M26.5 Dentofacial functional abnormalities applies to 9 codes
  • M26.55 Centric occlusion maximum intercuspation discrepancy
    • centric occlusion NOS (M26.59)
  • M27.1 Giant cell granuloma, central
    • peripheral giant cell granuloma (K06.8)
  • M27.4 Other and unspecified cysts of jaw applies to 2 codes
    • cysts of oral region (K09.-)
    • latent bone cyst of jaw (M27.0)
    • Stafne's cyst (M27.0)
  • M27.8 Other specified diseases of jaws
  • M30 Polyarteritis nodosa and related conditions applies to 5 codes
    • microscopic polyarteritis (M31.7)
  • M31.7 Microscopic polyangiitis
    • polyarteritis nodosa (M30.0)
  • M32 Systemic lupus erythematosus (SLE) applies to 10 codes
    • lupus erythematosus (discoid) (NOS) (L93.0)
  • M34 Systemic sclerosis [scleroderma] applies to 8 codes
    • circumscribed scleroderma (L94.0)
    • neonatal scleroderma (P83.88)
  • M35 Other systemic involvement of connective tissue applies to 23 codes
    • reactive perforating collagenosis (L87.1)
  • M35.0 Sjogren syndrome applies to 13 codes
    • dry mouth, unspecified (R68.2)
  • M35.1 Other overlap syndromes
    • polyangiitis overlap syndrome (M30.8)
  • M35.3 Polymyalgia rheumatica
    • polymyalgia rheumatica with giant cell arteritis (M31.5)
  • M35.6 Relapsing panniculitis [Weber-Christian]
  • M35.7 Hypermobility syndrome
    • ligamentous laxity, NOS (M24.2-)
  • M40 Kyphosis and lordosis applies to 31 codes
    • congenital kyphosis and lordosis (Q76.4)
    • kyphoscoliosis (M41.-)
    • postprocedural kyphosis and lordosis (M96.-)
  • M40.0 Postural kyphosis applies to 4 codes
    • osteochondrosis of spine (M42.-)
  • M41 Scoliosis applies to 55 codes
    • congenital scoliosis NOS (Q67.5)
    • congenital scoliosis due to bony malformation (Q76.3)
    • postural congenital scoliosis (Q67.5)
    • kyphoscoliotic heart disease (I27.1)
  • M42.0 Juvenile osteochondrosis of spine applies to 10 codes
    • postural kyphosis (M40.0)
  • M43 Other deforming dorsopathies applies to 50 codes
    • congenital spondylolysis and spondylolisthesis (Q76.2)
    • hemivertebra (Q76.3-Q76.4)
    • Klippel-Feil syndrome (Q76.1)
    • lumbarization and sacralization (Q76.4)
    • platyspondylisis (Q76.4)
    • spina bifida occulta (Q76.0)
    • spinal curvature in osteoporosis (M80.-)
    • spinal curvature in Paget's disease of bone [osteitis deformans] (M88.-)
  • M43.0 Spondylolysis applies to 10 codes
    • congenital spondylolysis (Q76.2)
    • spondylolisthesis (M43.1)
  • M43.1 Spondylolisthesis applies to 10 codes
    • acute traumatic of lumbosacral region (S33.1)
    • congenital spondylolisthesis (Q76.2)
  • M43.2 Fusion of spine applies to 9 codes
    • ankylosing spondylitis (M45.0-)
    • congenital fusion of spine (Q76.4)
  • M43.5 Other recurrent vertebral dislocation applies to 8 codes
    • biomechanical lesions NEC (M99.-)
  • M43.6 Torticollis
    • congenital (sternomastoid) torticollis (Q68.0)
    • ocular torticollis (R29.891)
    • psychogenic torticollis (F45.8)
    • spasmodic torticollis (G24.3)
    • torticollis due to birth injury (P15.2)
  • M45 Ankylosing spondylitis applies to 20 codes
    • arthropathy in Reiter's disease (M02.3-)
    • juvenile (ankylosing) spondylitis (M08.1)
  • M47.1 Other spondylosis with myelopathy applies to 7 codes
  • M48.4 Fatigue fracture of vertebra applies to 36 codes
    • pathological fracture NOS (M84.4-)
    • pathological fracture of vertebra due to neoplasm (M84.58)
    • pathological fracture of vertebra due to other diagnosis (M84.68)
    • pathological fracture of vertebra due to osteoporosis (M80.-)
    • traumatic fracture of vertebrae (S12.0-S12.3-, S22.0-, S32.0-)
  • M48.5 Collapsed vertebra, not elsewhere classified applies to 36 codes
    • fatigue fracture of vertebra (M48.4)
    • pathological fracture of vertebra due to neoplasm (M84.58)
    • pathological fracture of vertebra due to other diagnosis (M84.68)
    • pathological fracture of vertebra due to osteoporosis (M80.-)
    • pathological fracture NOS (M84.4-)
    • stress fracture of vertebra (M48.4-)
    • traumatic fracture of vertebra (S12.-, S22.-, S32.-)
  • M49 Spondylopathies in diseases classified elsewhere applies to 10 codes
    • curvature of spine in tuberculosis [Pott's] (A18.01)
    • enteropathic arthropathies (M07.-)
    • gonococcal spondylitis (A54.41)
    • neuropathic [tabes dorsalis] spondylitis (A52.11)
    • neuropathic spondylopathy in syringomyelia (G95.0)
    • neuropathic spondylopathy in tabes dorsalis (A52.11)
    • nonsyphilitic neuropathic spondylopathy NEC (G98.0)
    • spondylitis in syphilis (acquired) (A52.77)
    • tuberculous spondylitis (A18.01)
    • typhoid fever spondylitis (A01.05)
  • Block note Block M50-M54 Other dorsopathies applies to 133 codes
  • M51.1 Thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with radiculopathy applies to 4 codes
  • M54 Dorsalgia applies to 33 codes
    • psychogenic dorsalgia (F45.41)
  • M54.0 Panniculitis affecting regions of neck and back applies to 10 codes
    • lupus panniculitis (L93.2)
    • panniculitis NOS (M79.3)
    • relapsing [Weber-Christian] panniculitis (M35.6)
  • M54.1 Radiculopathy applies to 9 codes
    • neuralgia and neuritis NOS (M79.2)
    • radiculopathy with cervical disc disorder (M50.1)
    • radiculopathy with lumbar and other intervertebral disc disorder (M51.1-)
    • radiculopathy with spondylosis (M47.2-)
  • M54.2 Cervicalgia
    • cervicalgia due to intervertebral cervical disc disorder (M50.-)
  • M54.3 Sciatica applies to 3 codes
    • intervertebral disc degeneration, lumbar region with lower extremity pain only (M51.361)
    • intervertebral disc degeneration, lumbosacral region with lower extremity pain only (M51.371)
    • lesion of sciatic nerve (G57.0)
    • sciatica due to intervertebral disc disorder (M51.1-)
    • sciatica with lumbago (M54.4-)
  • M54.4 Lumbago with sciatica applies to 3 codes
    • intervertebral disc degeneration, lumbar region with discogenic back pain and lower extremity pain (M51.362)
    • intervertebral disc degeneration, lumbosacral region with discogenic back pain and lower extremity pain (M51.372)
    • lumbago with sciatica due to intervertebral disc disorder (M51.1-)
  • M54.5 Low back pain applies to 3 codes
    • intervertebral disc degeneration, lumbar region with discogenic back pain only (M51.360)
    • intervertebral disc degeneration, lumbosacral region with discogenic back pain only (M51.370)
    • low back strain (S39.012)
    • lumbago due to intervertebral disc displacement (M51.2-)
    • lumbago with sciatica (M54.4-)
  • M54.6 Pain in thoracic spine
    • pain in thoracic spine due to intervertebral disc disorder (M51.-)
  • M54.8 Other dorsalgia applies to 2 codes
    • dorsalgia in thoracic region (M54.6)
    • low back pain (M54.5-)
  • Block note Block M60-M63 Disorders of muscles applies to 420 codes
    • dermatopolymyositis (M33.-)
    • myopathy in amyloidosis (E85.-)
    • myopathy in polyarteritis nodosa (M30.0)
    • myopathy in rheumatoid arthritis (M05.32)
    • myopathy in scleroderma (M34.-)
    • myopathy in Sjögren's syndrome (M35.03)
    • myopathy in systemic lupus erythematosus (M32.-)
  • M60.2 Foreign body granuloma of soft tissue, not elsewhere classified applies to 23 codes
    • foreign body granuloma of skin and subcutaneous tissue (L92.3)
  • M61.4 Other calcification of muscle applies to 24 codes
    • calcific tendinitis NOS (M65.2-)
    • calcific tendinitis of shoulder (M75.3)
  • M62 Other disorders of muscle applies to 131 codes
  • M62.0 Separation of muscle (nontraumatic) applies to 23 codes
    • diastasis recti complicating pregnancy, labor and delivery (O71.8)
  • M62.2 Nontraumatic ischemic infarction of muscle applies to 23 codes
    • compartment syndrome (traumatic) (T79.A-)
    • nontraumatic compartment syndrome (M79.A-)
    • traumatic ischemia of muscle (T79.6)
    • rhabdomyolysis (M62.82)
    • Volkmann's ischemic contracture (T79.6)
  • M62.4 Contracture of muscle applies to 24 codes
  • M62.5 Muscle wasting and atrophy, not elsewhere classified applies to 28 codes
  • M62.81 Muscle weakness (generalized)
    • muscle weakness in sarcopenia (M62.84)
  • M62.82 Rhabdomyolysis
    • traumatic rhabdomyolysis (T79.6)
  • M63 Disorders of muscle in diseases classified elsewhere applies to 24 codes
    • myopathy in cysticercosis (B69.81)
    • myopathy in endocrine diseases (G73.7)
    • myopathy in metabolic diseases (G73.7)
    • myopathy in sarcoidosis (D86.87)
    • myopathy in secondary syphilis (A51.49)
    • myopathy in syphilis (late) (A52.78)
    • myopathy in toxoplasmosis (B58.82)
    • myopathy in tuberculosis (A18.09)
  • M65 Synovitis and tenosynovitis applies to 133 codes
    • chronic crepitant synovitis of hand and wrist (M70.0-)
    • soft tissue disorders related to use, overuse and pressure (M70.-)
  • M65.2 Calcific tendinitis applies to 21 codes
    • tendinitis as classified in M75-M77
    • calcified tendinitis of shoulder (M75.3)
  • M67 Other disorders of synovium and tendon applies to 143 codes
    • palmar fascial fibromatosis [Dupuytren] (M72.0)
    • tendinitis NOS (M77.9-)
    • xanthomatosis localized to tendons (E78.2)
  • M67.2 Synovial hypertrophy, not elsewhere classified applies to 24 codes
    • villonodular synovitis (pigmented) (M12.2-)
  • M67.3 Transient synovitis applies to 24 codes
    • palindromic rheumatism (M12.3-)
  • M67.4 Ganglion applies to 24 codes
  • M70 Soft tissue disorders related to use, overuse and pressure applies to 75 codes
  • M71 Other bursopathies applies to 138 codes
    • bunion (M20.1)
    • bursitis related to use, overuse or pressure (M70.-)
    • enthesopathies (M76-M77)
  • M71.2 Synovial cyst of popliteal space [Baker] applies to 3 codes
    • synovial cyst of popliteal space with rupture (M66.0)
  • M71.3 Other bursal cyst applies to 21 codes
    • synovial cyst with rupture (M66.1-)
  • M71.5 Other bursitis, not elsewhere classified applies to 20 codes
  • M72.8 Other fibroblastic disorders
    • diffuse (eosinophilic) fasciitis (M35.4)
    • necrotizing fasciitis (M72.6)
    • nodular fasciitis (M72.4)
    • perirenal fasciitis NOS (N13.5)
    • perirenal fasciitis with infection (N13.6)
    • plantar fasciitis (M67.A0-)
  • M75.1 Rotator cuff tear or rupture, not specified as traumatic applies to 9 codes
    • tear of rotator cuff, traumatic (S46.01-)
  • M77 Other enthesopathies applies to 20 codes
  • M77.4 Metatarsalgia applies to 3 codes
    • Morton's metatarsalgia (G57.6)
  • M79 Other and unspecified soft tissue disorders, not elsewhere classified applies to 52 codes
    • psychogenic rheumatism (F45.8)
    • soft tissue pain, psychogenic (F45.41)
  • M79.0 Rheumatism, unspecified
  • M79.1 Myalgia applies to 4 codes
  • M79.2 Neuralgia and neuritis, unspecified
  • M79.3 Panniculitis, unspecified
    • lupus panniculitis (L93.2)
    • neck and back panniculitis (M54.0-)
    • relapsing [Weber-Christian] panniculitis (M35.6)
  • M79.5 Residual foreign body in soft tissue
    • foreign body granuloma of skin and subcutaneous tissue (L92.3)
    • foreign body granuloma of soft tissue (M60.2-)
  • M79.A Nontraumatic compartment syndrome applies to 8 codes
    • compartment syndrome NOS (T79.A-)
    • fibromyalgia (M79.7)
    • nontraumatic ischemic infarction of muscle (M62.2-)
    • traumatic compartment syndrome (T79.A-)
  • M80 Osteoporosis with current pathological fracture applies to 324 codes
    • collapsed vertebra NOS (M48.5)
    • pathological fracture NOS (M84.4)
    • wedging of vertebra NOS (M48.5)
  • M81 Osteoporosis without current pathological fracture applies to 3 codes
    • osteoporosis with current pathological fracture (M80.-)
    • Sudeck's atrophy (M89.0)
  • M81.6 Localized osteoporosis [Lequesne]
  • M83 Adult osteomalacia applies to 8 codes
    • infantile and juvenile osteomalacia (E55.0)
    • renal osteodystrophy (N25.0)
    • rickets (active) (E55.0)
    • rickets (active) sequelae (E64.3)
    • vitamin D-resistant osteomalacia (E83.31)
    • vitamin D-resistant rickets (active) (E83.31)
  • M84.3 Stress fracture applies to 228 codes
  • M84.4 Pathological fracture, not elsewhere classified applies to 228 codes
  • M84.6 Pathological fracture in other disease applies to 192 codes
    • pathological fracture in osteoporosis (M80.-)
  • M85 Other disorders of bone density and structure applies to 169 codes
    • osteogenesis imperfecta (Q78.0)
    • osteopetrosis (Q78.2)
    • osteopoikilosis (Q78.8)
    • polyostotic fibrous dysplasia (Q78.1)
  • M85.6 Other cyst of bone applies to 24 codes
    • cyst of jaw NEC (M27.4)
    • osteitis fibrosa cystica generalisata [von Recklinghausen's disease of bone] (E21.0)
  • M85.8 Other specified disorders of bone density and structure applies to 24 codes
    • diffuse idiopathic skeletal hyperostosis [DISH] (M48.1)
    • osteosclerosis congenita (Q77.4)
    • osteosclerosis fragilitas (generalista) (Q78.2)
    • osteosclerosis myelofibrosis (D75.81)
  • Block note Block M86-M90 Other osteopathies applies to 732 codes
    • postprocedural osteopathies (M96.-)
  • M86 Osteomyelitis applies to 195 codes
  • M87 Osteonecrosis applies to 217 codes
    • juvenile osteonecrosis (M91-M92)
    • osteochondropathies (M90-M93)
  • M88 Osteitis deformans [Paget's disease of bone] applies to 26 codes
    • osteitis deformans in neoplastic disease (M90.6)
  • M89.0 Algoneurodystrophy applies to 24 codes
    • causalgia, lower limb (G57.7-)
    • causalgia, upper limb (G56.4-)
    • complex regional pain syndrome II, lower limb (G57.7-)
    • complex regional pain syndrome II, upper limb (G56.4-)
    • reflex sympathetic dystrophy (G90.5-)
  • M89.6 Osteopathy after poliomyelitis applies to 24 codes
    • postpolio syndrome (G14)
  • M90 Osteopathies in diseases classified elsewhere applies to 72 codes
  • M90.6 Osteitis deformans in neoplastic diseases applies to 24 codes
    • osteitis deformans [Paget's disease of bone] (M88.-)
  • Block note Block M91-M94 Chondropathies applies to 212 codes
    • postprocedural chondropathies (M96.-)
  • M91 Juvenile osteochondrosis of hip and pelvis applies to 19 codes
    • slipped upper femoral epiphysis (nontraumatic) (M93.0-)
  • M94.2 Chondromalacia applies to 24 codes
    • chondromalacia patellae (M22.4)
  • M95.5 Acquired deformity of pelvis
    • maternal care for known or suspected disproportion (O33.-)
  • M96.81 Intraoperative hemorrhage and hematoma of a musculoskeletal structure complicating a procedure applies to 2 codes
    • intraoperative hemorrhage and hematoma of a musculoskeletal structure due to accidental puncture and laceration during a procedure (M96.82-)

The first view lists notes printed in this chapter (a note on a category or block applies to every code beneath it). The second lists codes of this chapter named by Excludes1 Notes anywhere in the Tabular List, including notes in other chapters.

Questions About Excludes1 Notes

What does an Excludes1 note mean?

An Excludes1 note means “NOT CODED HERE!”: the excluded code should never be used at the same time as the code above the note. It is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition (Section I.A.12.a). The FY 2027 Tabular List has 5,411 of them; 5,284 name other codes, with 5,710 references to 3,528 distinct codes, categories and ranges.

Is there any exception to an Excludes1 note?

Yes: when the two conditions are unrelated to each other. The Guidelines’ example is F45.8, whose Excludes1 note names sleep related teeth grinding (G47.63). A patient with psychogenic dysmenorrhea (an inclusion term of F45.8) and teeth grinding may have both codes reported. If it is not clear whether the conditions are related, query the provider.

Related References

Source: FY 2027 ICD-10-CM Tabular List (CMS and NCHS) and the ICD-10-CM Official Guidelines for Coding and Reporting FY 2027, Section I.A. ICD List is not affiliated with CMS or NCHS.