ICD-10 · PDGM grouping

M40-M43 — Dorsopathies

Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.1.26.

OASIS-E2 v1.00.0 · ingested 2026-04-26

Codes in range

157

No clinical group

A period cannot be grouped from these.

Barred as primary

CMS rejects these in the primary position.

Where these codes group

105 of the 157 codes in M40-M43 group to Musculoskeletal Rehabilitation. A further 52 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.

EMusculoskeletal Rehabilitation105

Every code in M40-M43

Descriptions are CMS’s own, abbreviated as CMS abbreviates them.

Code	Description	Clinical group	Primary position
M4000	Postural kyphosis, site unspecified	None	Cannot group
M4003	Postural kyphosis, cervicothoracic region	None	Cannot group
M4004	Postural kyphosis, thoracic region	None	Cannot group
M4005	Postural kyphosis, thoracolumbar region	None	Cannot group
M4010	Other secondary kyphosis, site unspecified	None	Not accepted
M4012	Other secondary kyphosis, cervical region	None	Not accepted
M4013	Other secondary kyphosis, cervicothoracic region	None	Not accepted
M4014	Other secondary kyphosis, thoracic region	None	Not accepted
M4015	Other secondary kyphosis, thoracolumbar region	None	Not accepted
M40202	Unspecified kyphosis, cervical region	None	Cannot group
M40203	Unspecified kyphosis, cervicothoracic region	None	Cannot group
M40204	Unspecified kyphosis, thoracic region	None	Cannot group
M40205	Unspecified kyphosis, thoracolumbar region	None	Cannot group
M40209	Unspecified kyphosis, site unspecified	None	Cannot group
M40292	Other kyphosis, cervical region	None	Cannot group
M40293	Other kyphosis, cervicothoracic region	None	Cannot group
M40294	Other kyphosis, thoracic region	None	Cannot group
M40295	Other kyphosis, thoracolumbar region	None	Cannot group
M40299	Other kyphosis, site unspecified	None	Cannot group
M4030	Flatback syndrome, site unspecified	None	Cannot group
M4035	Flatback syndrome, thoracolumbar region	None	Cannot group
M4036	Flatback syndrome, lumbar region	None	Cannot group
M4037	Flatback syndrome, lumbosacral region	None	Cannot group
M4040	Postural lordosis, site unspecified	None	Cannot group
M4045	Postural lordosis, thoracolumbar region	None	Cannot group
M4046	Postural lordosis, lumbar region	None	Cannot group
M4047	Postural lordosis, lumbosacral region	None	Cannot group
M4050	Lordosis, unspecified, site unspecified	None	Cannot group
M4055	Lordosis, unspecified, thoracolumbar region	None	Cannot group
M4056	Lordosis, unspecified, lumbar region	None	Cannot group
M4057	Lordosis, unspecified, lumbosacral region	None	Cannot group
M4100	Infantile idiopathic scoliosis, site unspecified	None	Cannot group
M4102	Infantile idiopathic scoliosis, cervical region	E	Accepted
M4103	Infantile idiopathic scoliosis, cervicothoracic region	E	Accepted
M4104	Infantile idiopathic scoliosis, thoracic region	E	Accepted
M4105	Infantile idiopathic scoliosis, thoracolumbar region	E	Accepted
M4106	Infantile idiopathic scoliosis, lumbar region	E	Accepted
M4107	Infantile idiopathic scoliosis, lumbosacral region	E	Accepted
M4108	Infantile idiopathic scoliosis, sacr/sacrocygl region	E	Accepted
M41112	Juvenile idiopathic scoliosis, cervical region	E	Accepted
M41113	Juvenile idiopathic scoliosis, cervicothoracic region	E	Accepted
M41114	Juvenile idiopathic scoliosis, thoracic region	E	Accepted
M41115	Juvenile idiopathic scoliosis, thoracolumbar region	E	Accepted
M41116	Juvenile idiopathic scoliosis, lumbar region	E	Accepted
M41117	Juvenile idiopathic scoliosis, lumbosacral region	E	Accepted
M41119	Juvenile idiopathic scoliosis, site unspecified	None	Cannot group
M41122	Adolescent idiopathic scoliosis, cervical region	E	Accepted
M41123	Adolescent idiopathic scoliosis, cervicothoracic region	E	Accepted
M41124	Adolescent idiopathic scoliosis, thoracic region	E	Accepted
M41125	Adolescent idiopathic scoliosis, thoracolumbar region	E	Accepted
M41126	Adolescent idiopathic scoliosis, lumbar region	E	Accepted
M41127	Adolescent idiopathic scoliosis, lumbosacral region	E	Accepted
M41129	Adolescent idiopathic scoliosis, site unspecified	None	Cannot group
M4120	Other idiopathic scoliosis, site unspecified	E	Accepted
M4122	Other idiopathic scoliosis, cervical region	E	Accepted
M4123	Other idiopathic scoliosis, cervicothoracic region	E	Accepted
M4124	Other idiopathic scoliosis, thoracic region	E	Accepted
M4125	Other idiopathic scoliosis, thoracolumbar region	E	Accepted
M4126	Other idiopathic scoliosis, lumbar region	E	Accepted
M4127	Other idiopathic scoliosis, lumbosacral region	E	Accepted
M4130	Thoracogenic scoliosis, site unspecified	None	Cannot group
M4134	Thoracogenic scoliosis, thoracic region	E	Accepted
M4135	Thoracogenic scoliosis, thoracolumbar region	E	Accepted
M4140	Neuromuscular scoliosis, site unspecified	None	Cannot group
M4141	Neuromuscular scoliosis, occipito-atlanto-axial region	E	Accepted
M4142	Neuromuscular scoliosis, cervical region	E	Accepted
M4143	Neuromuscular scoliosis, cervicothoracic region	E	Accepted
M4144	Neuromuscular scoliosis, thoracic region	E	Accepted
M4145	Neuromuscular scoliosis, thoracolumbar region	E	Accepted
M4146	Neuromuscular scoliosis, lumbar region	E	Accepted
M4147	Neuromuscular scoliosis, lumbosacral region	E	Accepted
M4150	Other secondary scoliosis, site unspecified	None	Not accepted
M4152	Other secondary scoliosis, cervical region	None	Not accepted
M4153	Other secondary scoliosis, cervicothoracic region	None	Not accepted
M4154	Other secondary scoliosis, thoracic region	None	Not accepted
M4155	Other secondary scoliosis, thoracolumbar region	None	Not accepted
M4156	Other secondary scoliosis, lumbar region	None	Not accepted
M4157	Other secondary scoliosis, lumbosacral region	None	Not accepted
M4180	Other forms of scoliosis, site unspecified	None	Cannot group
M4182	Other forms of scoliosis, cervical region	E	Accepted
M4183	Other forms of scoliosis, cervicothoracic region	E	Accepted
M4184	Other forms of scoliosis, thoracic region	E	Accepted
M4185	Other forms of scoliosis, thoracolumbar region	E	Accepted
M4186	Other forms of scoliosis, lumbar region	E	Accepted
M4187	Other forms of scoliosis, lumbosacral region	E	Accepted
M419	Scoliosis, unspecified	E	Accepted
M4200	Juvenile osteochondrosis of spine, site unspecified	None	Cannot group
M4201	Juvenile osteochondrosis of spine, occipt-atlan-ax region	E	Accepted
M4202	Juvenile osteochondrosis of spine, cervical region	E	Accepted
M4203	Juvenile osteochondrosis of spine, cervicothoracic region	E	Accepted
M4204	Juvenile osteochondrosis of spine, thoracic region	E	Accepted
M4205	Juvenile osteochondrosis of spine, thoracolumbar region	E	Accepted
M4206	Juvenile osteochondrosis of spine, lumbar region	E	Accepted
M4207	Juvenile osteochondrosis of spine, lumbosacral region	E	Accepted
M4208	Juvenile osteochondrosis of spine, sacr/sacrocygl region	E	Accepted
M4209	Juvenile osteochondrosis of spine, multiple sites in spine	E	Accepted
M4210	Adult osteochondrosis of spine, site unspecified	None	Cannot group
M4211	Adult osteochondrosis of spine, occipt-atlan-ax region	E	Accepted
M4212	Adult osteochondrosis of spine, cervical region	E	Accepted
M4213	Adult osteochondrosis of spine, cervicothoracic region	E	Accepted
M4214	Adult osteochondrosis of spine, thoracic region	E	Accepted
M4215	Adult osteochondrosis of spine, thoracolumbar region	E	Accepted
M4216	Adult osteochondrosis of spine, lumbar region	E	Accepted
M4217	Adult osteochondrosis of spine, lumbosacral region	E	Accepted
M4218	Adult osteochondrosis of spine, sacr/sacrocygl region	E	Accepted
M4219	Adult osteochondrosis of spine, multiple sites in spine	E	Accepted
M429	Spinal osteochondrosis, unspecified	E	Accepted
M4300	Spondylolysis, site unspecified	None	Cannot group
M4301	Spondylolysis, occipito-atlanto-axial region	E	Accepted
M4302	Spondylolysis, cervical region	E	Accepted
M4303	Spondylolysis, cervicothoracic region	E	Accepted
M4304	Spondylolysis, thoracic region	E	Accepted
M4305	Spondylolysis, thoracolumbar region	E	Accepted
M4306	Spondylolysis, lumbar region	E	Accepted
M4307	Spondylolysis, lumbosacral region	E	Accepted
M4308	Spondylolysis, sacral and sacrococcygeal region	E	Accepted
M4309	Spondylolysis, multiple sites in spine	E	Accepted
M4310	Spondylolisthesis, site unspecified	None	Cannot group
M4311	Spondylolisthesis, occipito-atlanto-axial region	E	Accepted
M4312	Spondylolisthesis, cervical region	E	Accepted
M4313	Spondylolisthesis, cervicothoracic region	E	Accepted
M4314	Spondylolisthesis, thoracic region	E	Accepted
M4315	Spondylolisthesis, thoracolumbar region	E	Accepted
M4316	Spondylolisthesis, lumbar region	E	Accepted
M4317	Spondylolisthesis, lumbosacral region	E	Accepted
M4318	Spondylolisthesis, sacral and sacrococcygeal region	E	Accepted
M4319	Spondylolisthesis, multiple sites in spine	E	Accepted
M4320	Fusion of spine, site unspecified	None	Cannot group
M4321	Fusion of spine, occipito-atlanto-axial region	E	Accepted
M4322	Fusion of spine, cervical region	E	Accepted
M4323	Fusion of spine, cervicothoracic region	E	Accepted
M4324	Fusion of spine, thoracic region	E	Accepted
M4325	Fusion of spine, thoracolumbar region	E	Accepted
M4326	Fusion of spine, lumbar region	E	Accepted
M4327	Fusion of spine, lumbosacral region	E	Accepted
M4328	Fusion of spine, sacral and sacrococcygeal region	E	Accepted
M433	Recurrent atlantoaxial dislocation with myelopathy	E	Accepted
M434	Other recurrent atlantoaxial dislocation	E	Accepted
M435X2	Other recurrent vertebral dislocation, cervical region	E	Accepted
M435X3	Oth recurrent vertebral dislocation, cervicothoracic region	E	Accepted
M435X4	Other recurrent vertebral dislocation, thoracic region	E	Accepted
M435X5	Other recurrent vertebral dislocation, thoracolumbar region	E	Accepted
M435X6	Other recurrent vertebral dislocation, lumbar region	E	Accepted
M435X7	Other recurrent vertebral dislocation, lumbosacral region	E	Accepted
M435X8	Oth recurrent vertebral dislocation, sacr/sacrocygl region	E	Accepted
M435X9	Other recurrent vertebral dislocation, site unspecified	None	Cannot group
M436	Torticollis	E	Accepted
M438X1	Oth deforming dorsopathies, occipito-atlanto-axial region	E	Accepted
M438X2	Other specified deforming dorsopathies, cervical region	E	Accepted
M438X3	Oth deforming dorsopathies, cervicothoracic region	E	Accepted
M438X4	Other specified deforming dorsopathies, thoracic region	E	Accepted
M438X5	Other specified deforming dorsopathies, thoracolumbar region	E	Accepted
M438X6	Other specified deforming dorsopathies, lumbar region	E	Accepted
M438X7	Other specified deforming dorsopathies, lumbosacral region	E	Accepted
M438X8	Oth deforming dorsopathies, sacral and sacrococcygeal region	E	Accepted
M438X9	Other specified deforming dorsopathies, site unspecified	None	Cannot group
M439	Deforming dorsopathy, unspecified	None	Cannot group

Source: CMS HH PPS Grouper Software v07.1.26, effective 2026-04-01. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.

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M40-M43 — Dorsopathies

Where these codes group

Every code in M40-M43

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