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 v07.2.26.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in range
157
No clinical group
52
A period cannot be grouped from these.
Barred as primary
12
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.
Code families in M40-M43
One page per three-character family: every code in it, whether it can lead a claim, its clinical group and comorbidity subgroup.
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 lead a claim |
| M4003 | Postural kyphosis, cervicothoracic region | None | Cannot lead a claim |
| M4004 | Postural kyphosis, thoracic region | None | Cannot lead a claim |
| M4005 | Postural kyphosis, thoracolumbar region | None | Cannot lead a claim |
| M4010 | Other secondary kyphosis, site unspecified | None | Cannot lead a claim |
| M4012 | Other secondary kyphosis, cervical region | None | Cannot lead a claim |
| M4013 | Other secondary kyphosis, cervicothoracic region | None | Cannot lead a claim |
| M4014 | Other secondary kyphosis, thoracic region | None | Cannot lead a claim |
| M4015 | Other secondary kyphosis, thoracolumbar region | None | Cannot lead a claim |
| M40202 | Unspecified kyphosis, cervical region | None | Cannot lead a claim |
| M40203 | Unspecified kyphosis, cervicothoracic region | None | Cannot lead a claim |
| M40204 | Unspecified kyphosis, thoracic region | None | Cannot lead a claim |
| M40205 | Unspecified kyphosis, thoracolumbar region | None | Cannot lead a claim |
| M40209 | Unspecified kyphosis, site unspecified | None | Cannot lead a claim |
| M40292 | Other kyphosis, cervical region | None | Cannot lead a claim |
| M40293 | Other kyphosis, cervicothoracic region | None | Cannot lead a claim |
| M40294 | Other kyphosis, thoracic region | None | Cannot lead a claim |
| M40295 | Other kyphosis, thoracolumbar region | None | Cannot lead a claim |
| M40299 | Other kyphosis, site unspecified | None | Cannot lead a claim |
| M4030 | Flatback syndrome, site unspecified | None | Cannot lead a claim |
| M4035 | Flatback syndrome, thoracolumbar region | None | Cannot lead a claim |
| M4036 | Flatback syndrome, lumbar region | None | Cannot lead a claim |
| M4037 | Flatback syndrome, lumbosacral region | None | Cannot lead a claim |
| M4040 | Postural lordosis, site unspecified | None | Cannot lead a claim |
| M4045 | Postural lordosis, thoracolumbar region | None | Cannot lead a claim |
| M4046 | Postural lordosis, lumbar region | None | Cannot lead a claim |
| M4047 | Postural lordosis, lumbosacral region | None | Cannot lead a claim |
| M4050 | Lordosis, unspecified, site unspecified | None | Cannot lead a claim |
| M4055 | Lordosis, unspecified, thoracolumbar region | None | Cannot lead a claim |
| M4056 | Lordosis, unspecified, lumbar region | None | Cannot lead a claim |
| M4057 | Lordosis, unspecified, lumbosacral region | None | Cannot lead a claim |
| M4100 | Infantile idiopathic scoliosis, site unspecified | None | Cannot lead a claim |
| M4102 | Infantile idiopathic scoliosis, cervical region | E | Can lead a claim |
| M4103 | Infantile idiopathic scoliosis, cervicothoracic region | E | Can lead a claim |
| M4104 | Infantile idiopathic scoliosis, thoracic region | E | Can lead a claim |
| M4105 | Infantile idiopathic scoliosis, thoracolumbar region | E | Can lead a claim |
| M4106 | Infantile idiopathic scoliosis, lumbar region | E | Can lead a claim |
| M4107 | Infantile idiopathic scoliosis, lumbosacral region | E | Can lead a claim |
| M4108 | Infantile idiopathic scoliosis, sacr/sacrocygl region | E | Can lead a claim |
| M41112 | Juvenile idiopathic scoliosis, cervical region | E | Can lead a claim |
| M41113 | Juvenile idiopathic scoliosis, cervicothoracic region | E | Can lead a claim |
| M41114 | Juvenile idiopathic scoliosis, thoracic region | E | Can lead a claim |
| M41115 | Juvenile idiopathic scoliosis, thoracolumbar region | E | Can lead a claim |
| M41116 | Juvenile idiopathic scoliosis, lumbar region | E | Can lead a claim |
| M41117 | Juvenile idiopathic scoliosis, lumbosacral region | E | Can lead a claim |
| M41119 | Juvenile idiopathic scoliosis, site unspecified | None | Cannot lead a claim |
| M41122 | Adolescent idiopathic scoliosis, cervical region | E | Can lead a claim |
| M41123 | Adolescent idiopathic scoliosis, cervicothoracic region | E | Can lead a claim |
| M41124 | Adolescent idiopathic scoliosis, thoracic region | E | Can lead a claim |
| M41125 | Adolescent idiopathic scoliosis, thoracolumbar region | E | Can lead a claim |
| M41126 | Adolescent idiopathic scoliosis, lumbar region | E | Can lead a claim |
| M41127 | Adolescent idiopathic scoliosis, lumbosacral region | E | Can lead a claim |
| M41129 | Adolescent idiopathic scoliosis, site unspecified | None | Cannot lead a claim |
| M4120 | Other idiopathic scoliosis, site unspecified | E | Can lead a claim |
| M4122 | Other idiopathic scoliosis, cervical region | E | Can lead a claim |
| M4123 | Other idiopathic scoliosis, cervicothoracic region | E | Can lead a claim |
| M4124 | Other idiopathic scoliosis, thoracic region | E | Can lead a claim |
| M4125 | Other idiopathic scoliosis, thoracolumbar region | E | Can lead a claim |
| M4126 | Other idiopathic scoliosis, lumbar region | E | Can lead a claim |
| M4127 | Other idiopathic scoliosis, lumbosacral region | E | Can lead a claim |
| M4130 | Thoracogenic scoliosis, site unspecified | None | Cannot lead a claim |
| M4134 | Thoracogenic scoliosis, thoracic region | E | Can lead a claim |
| M4135 | Thoracogenic scoliosis, thoracolumbar region | E | Can lead a claim |
| M4140 | Neuromuscular scoliosis, site unspecified | None | Cannot lead a claim |
| M4141 | Neuromuscular scoliosis, occipito-atlanto-axial region | E | Can lead a claim |
| M4142 | Neuromuscular scoliosis, cervical region | E | Can lead a claim |
| M4143 | Neuromuscular scoliosis, cervicothoracic region | E | Can lead a claim |
| M4144 | Neuromuscular scoliosis, thoracic region | E | Can lead a claim |
| M4145 | Neuromuscular scoliosis, thoracolumbar region | E | Can lead a claim |
| M4146 | Neuromuscular scoliosis, lumbar region | E | Can lead a claim |
| M4147 | Neuromuscular scoliosis, lumbosacral region | E | Can lead a claim |
| M4150 | Other secondary scoliosis, site unspecified | None | Cannot lead a claim |
| M4152 | Other secondary scoliosis, cervical region | None | Cannot lead a claim |
| M4153 | Other secondary scoliosis, cervicothoracic region | None | Cannot lead a claim |
| M4154 | Other secondary scoliosis, thoracic region | None | Cannot lead a claim |
| M4155 | Other secondary scoliosis, thoracolumbar region | None | Cannot lead a claim |
| M4156 | Other secondary scoliosis, lumbar region | None | Cannot lead a claim |
| M4157 | Other secondary scoliosis, lumbosacral region | None | Cannot lead a claim |
| M4180 | Other forms of scoliosis, site unspecified | None | Cannot lead a claim |
| M4182 | Other forms of scoliosis, cervical region | E | Can lead a claim |
| M4183 | Other forms of scoliosis, cervicothoracic region | E | Can lead a claim |
| M4184 | Other forms of scoliosis, thoracic region | E | Can lead a claim |
| M4185 | Other forms of scoliosis, thoracolumbar region | E | Can lead a claim |
| M4186 | Other forms of scoliosis, lumbar region | E | Can lead a claim |
| M4187 | Other forms of scoliosis, lumbosacral region | E | Can lead a claim |
| M419 | Scoliosis, unspecified | E | Can lead a claim |
| M4200 | Juvenile osteochondrosis of spine, site unspecified | None | Cannot lead a claim |
| M4201 | Juvenile osteochondrosis of spine, occipt-atlan-ax region | E | Can lead a claim |
| M4202 | Juvenile osteochondrosis of spine, cervical region | E | Can lead a claim |
| M4203 | Juvenile osteochondrosis of spine, cervicothoracic region | E | Can lead a claim |
| M4204 | Juvenile osteochondrosis of spine, thoracic region | E | Can lead a claim |
| M4205 | Juvenile osteochondrosis of spine, thoracolumbar region | E | Can lead a claim |
| M4206 | Juvenile osteochondrosis of spine, lumbar region | E | Can lead a claim |
| M4207 | Juvenile osteochondrosis of spine, lumbosacral region | E | Can lead a claim |
| M4208 | Juvenile osteochondrosis of spine, sacr/sacrocygl region | E | Can lead a claim |
| M4209 | Juvenile osteochondrosis of spine, multiple sites in spine | E | Can lead a claim |
| M4210 | Adult osteochondrosis of spine, site unspecified | None | Cannot lead a claim |
| M4211 | Adult osteochondrosis of spine, occipt-atlan-ax region | E | Can lead a claim |
| M4212 | Adult osteochondrosis of spine, cervical region | E | Can lead a claim |
| M4213 | Adult osteochondrosis of spine, cervicothoracic region | E | Can lead a claim |
| M4214 | Adult osteochondrosis of spine, thoracic region | E | Can lead a claim |
| M4215 | Adult osteochondrosis of spine, thoracolumbar region | E | Can lead a claim |
| M4216 | Adult osteochondrosis of spine, lumbar region | E | Can lead a claim |
| M4217 | Adult osteochondrosis of spine, lumbosacral region | E | Can lead a claim |
| M4218 | Adult osteochondrosis of spine, sacr/sacrocygl region | E | Can lead a claim |
| M4219 | Adult osteochondrosis of spine, multiple sites in spine | E | Can lead a claim |
| M429 | Spinal osteochondrosis, unspecified | E | Can lead a claim |
| M4300 | Spondylolysis, site unspecified | None | Cannot lead a claim |
| M4301 | Spondylolysis, occipito-atlanto-axial region | E | Can lead a claim |
| M4302 | Spondylolysis, cervical region | E | Can lead a claim |
| M4303 | Spondylolysis, cervicothoracic region | E | Can lead a claim |
| M4304 | Spondylolysis, thoracic region | E | Can lead a claim |
| M4305 | Spondylolysis, thoracolumbar region | E | Can lead a claim |
| M4306 | Spondylolysis, lumbar region | E | Can lead a claim |
| M4307 | Spondylolysis, lumbosacral region | E | Can lead a claim |
| M4308 | Spondylolysis, sacral and sacrococcygeal region | E | Can lead a claim |
| M4309 | Spondylolysis, multiple sites in spine | E | Can lead a claim |
| M4310 | Spondylolisthesis, site unspecified | None | Cannot lead a claim |
| M4311 | Spondylolisthesis, occipito-atlanto-axial region | E | Can lead a claim |
| M4312 | Spondylolisthesis, cervical region | E | Can lead a claim |
| M4313 | Spondylolisthesis, cervicothoracic region | E | Can lead a claim |
| M4314 | Spondylolisthesis, thoracic region | E | Can lead a claim |
| M4315 | Spondylolisthesis, thoracolumbar region | E | Can lead a claim |
| M4316 | Spondylolisthesis, lumbar region | E | Can lead a claim |
| M4317 | Spondylolisthesis, lumbosacral region | E | Can lead a claim |
| M4318 | Spondylolisthesis, sacral and sacrococcygeal region | E | Can lead a claim |
| M4319 | Spondylolisthesis, multiple sites in spine | E | Can lead a claim |
| M4320 | Fusion of spine, site unspecified | None | Cannot lead a claim |
| M4321 | Fusion of spine, occipito-atlanto-axial region | E | Can lead a claim |
| M4322 | Fusion of spine, cervical region | E | Can lead a claim |
| M4323 | Fusion of spine, cervicothoracic region | E | Can lead a claim |
| M4324 | Fusion of spine, thoracic region | E | Can lead a claim |
| M4325 | Fusion of spine, thoracolumbar region | E | Can lead a claim |
| M4326 | Fusion of spine, lumbar region | E | Can lead a claim |
| M4327 | Fusion of spine, lumbosacral region | E | Can lead a claim |
| M4328 | Fusion of spine, sacral and sacrococcygeal region | E | Can lead a claim |
| M433 | Recurrent atlantoaxial dislocation with myelopathy | E | Can lead a claim |
| M434 | Other recurrent atlantoaxial dislocation | E | Can lead a claim |
| M435X2 | Other recurrent vertebral dislocation, cervical region | E | Can lead a claim |
| M435X3 | Oth recurrent vertebral dislocation, cervicothoracic region | E | Can lead a claim |
| M435X4 | Other recurrent vertebral dislocation, thoracic region | E | Can lead a claim |
| M435X5 | Other recurrent vertebral dislocation, thoracolumbar region | E | Can lead a claim |
| M435X6 | Other recurrent vertebral dislocation, lumbar region | E | Can lead a claim |
| M435X7 | Other recurrent vertebral dislocation, lumbosacral region | E | Can lead a claim |
| M435X8 | Oth recurrent vertebral dislocation, sacr/sacrocygl region | E | Can lead a claim |
| M435X9 | Other recurrent vertebral dislocation, site unspecified | None | Cannot lead a claim |
| M436 | Torticollis | E | Can lead a claim |
| M438X1 | Oth deforming dorsopathies, occipito-atlanto-axial region | E | Can lead a claim |
| M438X2 | Other specified deforming dorsopathies, cervical region | E | Can lead a claim |
| M438X3 | Oth deforming dorsopathies, cervicothoracic region | E | Can lead a claim |
| M438X4 | Other specified deforming dorsopathies, thoracic region | E | Can lead a claim |
| M438X5 | Other specified deforming dorsopathies, thoracolumbar region | E | Can lead a claim |
| M438X6 | Other specified deforming dorsopathies, lumbar region | E | Can lead a claim |
| M438X7 | Other specified deforming dorsopathies, lumbosacral region | E | Can lead a claim |
| M438X8 | Oth deforming dorsopathies, sacral and sacrococcygeal region | E | Can lead a claim |
| M438X9 | Other specified deforming dorsopathies, site unspecified | None | Cannot lead a claim |
| M439 | Deforming dorsopathy, unspecified | None | Cannot lead a claim |
Source: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01. 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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