ICD-10 · PDGM grouping

M45-M49 — Spondylopathies

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

264

No clinical group

38

A period cannot be grouped from these.

Barred as primary

0

CMS rejects these in the primary position.

Where these codes group

226 of the 264 codes in M45-M49 group to Musculoskeletal Rehabilitation. A further 38 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.

Every code in M45-M49

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

CodeDescriptionClinical groupPrimary position
M450Ankylosing spondylitis of multiple sites in spineEAccepted
M451Ankylosing spondylitis of occipito-atlanto-axial regionEAccepted
M452Ankylosing spondylitis of cervical regionEAccepted
M453Ankylosing spondylitis of cervicothoracic regionEAccepted
M454Ankylosing spondylitis of thoracic regionEAccepted
M455Ankylosing spondylitis of thoracolumbar regionEAccepted
M456Ankylosing spondylitis lumbar regionEAccepted
M457Ankylosing spondylitis of lumbosacral regionEAccepted
M458Ankylosing spondylitis sacral and sacrococcygeal regionEAccepted
M459Ankylosing spondylitis of unspecified sites in spineNoneCannot group
M45A0Non-radiographic axial spondyloarthritis unsp site in spinNoneCannot group
M45A1Non-radiographic axial spondyloarthritis occipt-atlan-ax rgnEAccepted
M45A2Non-radiographic axial spondyloarthritis of cervical regionEAccepted
M45A3Non-radiographic axial spondyloarthritis of cervicothor rgnEAccepted
M45A4Non-radiographic axial spondyloarthritis of thoracic regionEAccepted
M45A5Non-radiographic axial spondyloarthritis of thrclm regionEAccepted
M45A6Non-radiographic axial spondyloarthritis of lumbar regionEAccepted
M45A7Non-radiographic axial spondyloarthritis of lumbosacr regionEAccepted
M45A8Non-radiographic axial spondyloarthritis sacr/sacrocygl rgnEAccepted
M45ABNon-radiographic axial spondyloarthritis mult site in spineEAccepted
M4600Spinal enthesopathy, site unspecifiedNoneCannot group
M4601Spinal enthesopathy, occipito-atlanto-axial regionEAccepted
M4602Spinal enthesopathy, cervical regionEAccepted
M4603Spinal enthesopathy, cervicothoracic regionEAccepted
M4604Spinal enthesopathy, thoracic regionEAccepted
M4605Spinal enthesopathy, thoracolumbar regionEAccepted
M4606Spinal enthesopathy, lumbar regionEAccepted
M4607Spinal enthesopathy, lumbosacral regionEAccepted
M4608Spinal enthesopathy, sacral and sacrococcygeal regionEAccepted
M4609Spinal enthesopathy, multiple sites in spineEAccepted
M461Sacroiliitis, not elsewhere classifiedEAccepted
M4620Osteomyelitis of vertebra, site unspecifiedNoneToo unspecified
M4621Osteomyelitis of vertebra, occipito-atlanto-axial regionEAccepted
M4622Osteomyelitis of vertebra, cervical regionEAccepted
M4623Osteomyelitis of vertebra, cervicothoracic regionEAccepted
M4624Osteomyelitis of vertebra, thoracic regionEAccepted
M4625Osteomyelitis of vertebra, thoracolumbar regionEAccepted
M4626Osteomyelitis of vertebra, lumbar regionEAccepted
M4627Osteomyelitis of vertebra, lumbosacral regionEAccepted
M4628Osteomyelitis of vertebra, sacral and sacrococcygeal regionEAccepted
M4630Infection of intervertebral disc (pyogenic), site unspNoneToo unspecified
M4631Infection of intvrt disc (pyogenic), occipt-atlan-ax regionEAccepted
M4632Infection of intervertebral disc (pyogenic), cervical regionEAccepted
M4633Infection of intvrt disc (pyogenic), cervicothor regionEAccepted
M4634Infection of intervertebral disc (pyogenic), thoracic regionEAccepted
M4635Infection of intvrt disc (pyogenic), thoracolumbar regionEAccepted
M4636Infection of intervertebral disc (pyogenic), lumbar regionEAccepted
M4637Infection of intvrt disc (pyogenic), lumbosacral regionEAccepted
M4638Infection of intvrt disc (pyogenic), sacr/sacrocygl regionEAccepted
M4639Infection of intvrt disc (pyogenic), multiple sites in spineEAccepted
M4640Discitis, unspecified, site unspecifiedNoneCannot group
M4641Discitis, unspecified, occipito-atlanto-axial regionEAccepted
M4642Discitis, unspecified, cervical regionEAccepted
M4643Discitis, unspecified, cervicothoracic regionEAccepted
M4644Discitis, unspecified, thoracic regionEAccepted
M4645Discitis, unspecified, thoracolumbar regionEAccepted
M4646Discitis, unspecified, lumbar regionEAccepted
M4647Discitis, unspecified, lumbosacral regionEAccepted
M4648Discitis, unspecified, sacral and sacrococcygeal regionEAccepted
M4649Discitis, unspecified, multiple sites in spineEAccepted
M4650Other infective spondylopathies, site unspecifiedNoneCannot group
M4651Oth infective spondylopathies, occipito-atlanto-axial regionEAccepted
M4652Other infective spondylopathies, cervical regionEAccepted
M4653Other infective spondylopathies, cervicothoracic regionEAccepted
M4654Other infective spondylopathies, thoracic regionEAccepted
M4655Other infective spondylopathies, thoracolumbar regionEAccepted
M4656Other infective spondylopathies, lumbar regionEAccepted
M4657Other infective spondylopathies, lumbosacral regionEAccepted
M4658Oth infective spondylopathies, sacr/sacrocygl regionEAccepted
M4659Other infective spondylopathies, multiple sites in spineEAccepted
M4680Oth inflammatory spondylopathies, site unspecifiedNoneCannot group
M4681Oth inflammatory spondylopathies, occipt-atlan-ax regionEAccepted
M4682Oth inflammatory spondylopathies, cervical regionEAccepted
M4683Oth inflammatory spondylopathies, cervicothoracic regionEAccepted
M4684Oth inflammatory spondylopathies, thoracic regionEAccepted
M4685Oth inflammatory spondylopathies, thoracolumbar regionEAccepted
M4686Other specified inflammatory spondylopathies, lumbar regionEAccepted
M4687Oth inflammatory spondylopathies, lumbosacral regionEAccepted
M4688Oth inflammatory spondylopathies, sacr/sacrocygl regionEAccepted
M4689Oth inflammatory spondylopathies, multiple sites in spineEAccepted
M4690Unspecified inflammatory spondylopathy, site unspecifiedNoneCannot group
M4691Unsp inflammatory spondylopathy, occipt-atlan-ax regionEAccepted
M4692Unspecified inflammatory spondylopathy, cervical regionEAccepted
M4693Unsp inflammatory spondylopathy, cervicothoracic regionEAccepted
M4694Unspecified inflammatory spondylopathy, thoracic regionEAccepted
M4695Unspecified inflammatory spondylopathy, thoracolumbar regionEAccepted
M4696Unspecified inflammatory spondylopathy, lumbar regionEAccepted
M4697Unspecified inflammatory spondylopathy, lumbosacral regionEAccepted
M4698Unsp inflammatory spondylopathy, sacr/sacrocygl regionEAccepted
M4699Unsp inflammatory spondylopathy, multiple sites in spineEAccepted
M47011Anterior spinal artery comprsn synd, occipt-atlan-ax regionEAccepted
M47012Anterior spinal artery comprsn syndromes, cervical regionEAccepted
M47013Anterior spinal artery comprsn syndromes, cervicothor regionEAccepted
M47014Anterior spinal artery comprsn syndromes, thoracic regionEAccepted
M47015Anterior spinal artery comprsn syndromes, thoracolum regionEAccepted
M47016Anterior spinal artery compression syndromes, lumbar regionEAccepted
M47019Anterior spinal artery compression syndromes, site unspNoneToo unspecified
M47021Verteb art compression syndromes, occipt-atlan-ax regionEAccepted
M47022Vertebral artery compression syndromes, cervical regionEAccepted
M47029Vertebral artery compression syndromes, site unspecifiedNoneToo unspecified
M4710Other spondylosis with myelopathy, site unspecifiedNoneToo unspecified
M4711Oth spondylosis w myelopathy, occipito-atlanto-axial regionEAccepted
M4712Other spondylosis with myelopathy, cervical regionEAccepted
M4713Other spondylosis with myelopathy, cervicothoracic regionEAccepted
M4714Other spondylosis with myelopathy, thoracic regionEAccepted
M4715Other spondylosis with myelopathy, thoracolumbar regionEAccepted
M4716Other spondylosis with myelopathy, lumbar regionEAccepted
M4720Other spondylosis with radiculopathy, site unspecifiedNoneCannot group
M4721Oth spondylosis w radiculopathy, occipt-atlan-ax regionEAccepted
M4722Other spondylosis with radiculopathy, cervical regionEAccepted
M4723Other spondylosis with radiculopathy, cervicothoracic regionEAccepted
M4724Other spondylosis with radiculopathy, thoracic regionEAccepted
M4725Other spondylosis with radiculopathy, thoracolumbar regionEAccepted
M4726Other spondylosis with radiculopathy, lumbar regionEAccepted
M4727Other spondylosis with radiculopathy, lumbosacral regionEAccepted
M4728Oth spondylosis w radiculopathy, sacr/sacrocygl regionEAccepted
M47811Spondyls w/o myelpath or radiculopathy, occipt-atlan-ax rgnEAccepted
M47812Spondylosis w/o myelopathy or radiculopathy, cervical regionEAccepted
M47813Spondyls w/o myelopathy or radiculopathy, cervicothor regionEAccepted
M47814Spondylosis w/o myelopathy or radiculopathy, thoracic regionEAccepted
M47815Spondyls w/o myelopathy or radiculopathy, thoracolum regionEAccepted
M47816Spondylosis w/o myelopathy or radiculopathy, lumbar regionEAccepted
M47817Spondyls w/o myelopathy or radiculopathy, lumbosacr regionEAccepted
M47818Spondyls w/o myelpath or radiculopathy, sacr/sacrocygl rgnEAccepted
M47819Spondylosis without myelopathy or radiculopathy, site unspNoneCannot group
M47891Other spondylosis, occipito-atlanto-axial regionEAccepted
M47892Other spondylosis, cervical regionEAccepted
M47893Other spondylosis, cervicothoracic regionEAccepted
M47894Other spondylosis, thoracic regionEAccepted
M47895Other spondylosis, thoracolumbar regionEAccepted
M47896Other spondylosis, lumbar regionEAccepted
M47897Other spondylosis, lumbosacral regionEAccepted
M47898Other spondylosis, sacral and sacrococcygeal regionEAccepted
M47899Other spondylosis, site unspecifiedNoneCannot group
M479Spondylosis, unspecifiedNoneCannot group
M4800Spinal stenosis, site unspecifiedNoneCannot group
M4801Spinal stenosis, occipito-atlanto-axial regionEAccepted
M4802Spinal stenosis, cervical regionEAccepted
M4803Spinal stenosis, cervicothoracic regionEAccepted
M4804Spinal stenosis, thoracic regionEAccepted
M4805Spinal stenosis, thoracolumbar regionEAccepted
M48061Spinal stenosis, lumbar region without neurogenic claudEAccepted
M48062Spinal stenosis, lumbar region with neurogenic claudicationEAccepted
M4807Spinal stenosis, lumbosacral regionEAccepted
M4808Spinal stenosis, sacral and sacrococcygeal regionEAccepted
M4810Ankylosing hyperostosis [Forestier], site unspecifiedEAccepted
M4811Ankylosing hyperostosis, occipito-atlanto-axial regionEAccepted
M4812Ankylosing hyperostosis [Forestier], cervical regionEAccepted
M4813Ankylosing hyperostosis [Forestier], cervicothoracic regionEAccepted
M4814Ankylosing hyperostosis [Forestier], thoracic regionEAccepted
M4815Ankylosing hyperostosis [Forestier], thoracolumbar regionEAccepted
M4816Ankylosing hyperostosis [Forestier], lumbar regionEAccepted
M4817Ankylosing hyperostosis [Forestier], lumbosacral regionEAccepted
M4818Ankylosing hyperostosis, sacral and sacrococcygeal regionEAccepted
M4819Ankylosing hyperostosis [Forestier], multiple sites in spineEAccepted
M4820Kissing spine, site unspecifiedNoneCannot group
M4821Kissing spine, occipito-atlanto-axial regionEAccepted
M4822Kissing spine, cervical regionEAccepted
M4823Kissing spine, cervicothoracic regionEAccepted
M4824Kissing spine, thoracic regionEAccepted
M4825Kissing spine, thoracolumbar regionEAccepted
M4826Kissing spine, lumbar regionEAccepted
M4827Kissing spine, lumbosacral regionEAccepted
M4830Traumatic spondylopathy, site unspecifiedNoneToo unspecified
M4831Traumatic spondylopathy, occipito-atlanto-axial regionEAccepted
M4832Traumatic spondylopathy, cervical regionEAccepted
M4833Traumatic spondylopathy, cervicothoracic regionEAccepted
M4834Traumatic spondylopathy, thoracic regionEAccepted
M4835Traumatic spondylopathy, thoracolumbar regionEAccepted
M4836Traumatic spondylopathy, lumbar regionEAccepted
M4837Traumatic spondylopathy, lumbosacral regionEAccepted
M4838Traumatic spondylopathy, sacral and sacrococcygeal regionEAccepted
M4840XAFatigue fracture of vertebra, site unsp, init for fxNoneCannot group
M4840XDFatigue fx vertebra, site unsp, subs for fx w routn healNoneCannot group
M4840XGFatigue fx vertebra, site unsp, subs for fx w delay healNoneCannot group
M4840XSFatigue fracture of vertebra, site unsp, sequela of fractureNoneCannot group
M4841XAFatigue fracture of vertebra, occipt-atlan-ax region, initEAccepted
M4841XDFatigue fx vert, occipt-atlan-ax rgn, 7thDEAccepted
M4841XGFatigue fx vert, occipt-atlan-ax rgn, 7thGEAccepted
M4841XSFatigue fracture of vertebra, occipt-atlan-ax region, sqlaEAccepted
M4842XAFatigue fracture of vertebra, cervical region, init for fxEAccepted
M4842XDFatigue fx vertebra, cerv region, subs for fx w routn healEAccepted
M4842XGFatigue fx vertebra, cerv region, subs for fx w delay healEAccepted
M4842XSFatigue fracture of vertebra, cervical region, sqlaEAccepted
M4843XAFatigue fracture of vertebra, cervicothoracic region, initEAccepted
M4843XDFatigue fx vert, cervicothor rgn, subs for fx w routn healEAccepted
M4843XGFatigue fx vert, cervicothor rgn, subs for fx w delay healEAccepted
M4843XSFatigue fracture of vertebra, cervicothoracic region, sqlaEAccepted
M4844XAFatigue fracture of vertebra, thoracic region, init for fxEAccepted
M4844XDFatigue fx vertebra, thor region, subs for fx w routn healEAccepted
M4844XGFatigue fx vertebra, thor region, subs for fx w delay healEAccepted
M4844XSFatigue fracture of vertebra, thoracic region, sqlaEAccepted
M4845XAFatigue fracture of vertebra, thoracolumbar region, initEAccepted
M4845XDFatigue fx vertebra, thrclm region, subs for fx w routn healEAccepted
M4845XGFatigue fx vertebra, thrclm region, subs for fx w delay healEAccepted
M4845XSFatigue fracture of vertebra, thoracolumbar region, sqlaEAccepted
M4846XAFatigue fracture of vertebra, lumbar region, init for fxEAccepted
M4846XDFatigue fx vertebra, lumbar region, subs for fx w routn healEAccepted
M4846XGFatigue fx vertebra, lumbar region, subs for fx w delay healEAccepted
M4846XSFatigue fracture of vertebra, lumbar region, sqlaEAccepted
M4847XAFatigue fracture of vertebra, lumbosacral region, initEAccepted
M4847XDFatigue fx vert, lumbosacr region, subs for fx w routn healEAccepted
M4847XGFatigue fx vert, lumbosacr region, subs for fx w delay healEAccepted
M4847XSFatigue fracture of vertebra, lumbosacral region, sqlaEAccepted
M4848XAFatigue fracture of vertebra, sacr/sacrocygl region, initEAccepted
M4848XDFatigue fx vert, sacr/sacrocygl rgn, 7thDEAccepted
M4848XGFatigue fx vert, sacr/sacrocygl rgn, 7thGEAccepted
M4848XSFatigue fracture of vertebra, sacr/sacrocygl region, sqlaEAccepted
M4850XACollapsed vertebra, NEC, site unsp, initNoneToo unspecified
M4850XDCollapsed vertebra, NEC, site unsp, subs for fx w routn healNoneCannot group
M4850XGCollapsed vertebra, NEC, site unsp, subs for fx w delay healNoneCannot group
M4850XSCollapsed vertebra, NEC, site unsp, sequela of fractureNoneCannot group
M4851XACollapsed vertebra, NEC, occipito-atlanto-axial region, initEAccepted
M4851XDCollapsed vert, NEC, occipt-atlan-ax rgn, 7thDEAccepted
M4851XGCollapsed vert, NEC, occipt-atlan-ax rgn, 7thGEAccepted
M4851XSCollapsed vertebra, NEC, occipt-atlan-ax region, sqlaEAccepted
M4852XACollapsed vertebra, NEC, cervical region, initEAccepted
M4852XDCollapsed vert, NEC, cerv region, subs for fx w routn healEAccepted
M4852XGCollapsed vert, NEC, cerv region, subs for fx w delay healEAccepted
M4852XSCollapsed vertebra, NEC, cervical region, sqlaEAccepted
M4853XACollapsed vertebra, NEC, cervicothoracic region, initEAccepted
M4853XDCollapsed vert, NEC, cervicothor rgn, 7thDEAccepted
M4853XGCollapsed vert, NEC, cervicothor rgn, 7thGEAccepted
M4853XSCollapsed vertebra, NEC, cervicothoracic region, sqlaEAccepted
M4854XACollapsed vertebra, NEC, thoracic region, initEAccepted
M4854XDCollapsed vert, NEC, thor region, subs for fx w routn healEAccepted
M4854XGCollapsed vert, NEC, thor region, subs for fx w delay healEAccepted
M4854XSCollapsed vertebra, NEC, thoracic region, sqlaEAccepted
M4855XACollapsed vertebra, NEC, thoracolumbar region, initEAccepted
M4855XDCollapsed vert, NEC, thrclm region, subs for fx w routn healEAccepted
M4855XGCollapsed vert, NEC, thrclm region, subs for fx w delay healEAccepted
M4855XSCollapsed vertebra, NEC, thoracolumbar region, sqlaEAccepted
M4856XACollapsed vertebra, NEC, lumbar region, initEAccepted
M4856XDCollapsed vert, NEC, lumbar region, subs for fx w routn healEAccepted
M4856XGCollapsed vert, NEC, lumbar region, subs for fx w delay healEAccepted
M4856XSCollapsed vertebra, NEC, lumbar region, sequela of fractureEAccepted
M4857XACollapsed vertebra, NEC, lumbosacral region, initEAccepted
M4857XDCollapsed vert, NEC, lumbosacr rgn, subs for fx w routn healEAccepted
M4857XGCollapsed vert, NEC, lumbosacr rgn, subs for fx w delay healEAccepted
M4857XSCollapsed vertebra, NEC, lumbosacral region, sqlaEAccepted
M4858XACollapsed vertebra, NEC, sacr/sacrocygl region, initEAccepted
M4858XDCollapsed vert, NEC, sacr/sacrocygl rgn, 7thDEAccepted
M4858XGCollapsed vert, NEC, sacr/sacrocygl rgn, 7thGEAccepted
M4858XSCollapsed vertebra, NEC, sacr/sacrocygl region, sqlaEAccepted
M488X1Oth spondylopathies, occipito-atlanto-axial regionEAccepted
M488X2Other specified spondylopathies, cervical regionEAccepted
M488X3Other specified spondylopathies, cervicothoracic regionEAccepted
M488X4Other specified spondylopathies, thoracic regionEAccepted
M488X5Other specified spondylopathies, thoracolumbar regionEAccepted
M488X6Other specified spondylopathies, lumbar regionEAccepted
M488X7Other specified spondylopathies, lumbosacral regionEAccepted
M488X8Oth spondylopathies, sacral and sacrococcygeal regionEAccepted
M488X9Other specified spondylopathies, site unspecifiedNoneCannot group
M489Spondylopathy, unspecifiedEAccepted
M4980Spondylopathy in diseases classified elsewhere, site unspNoneCannot group
M4981Spond in diseases classd elswhr, occipt-atlan-ax regionNoneCannot group
M4982Spondylopathy in diseases classd elswhr, cervical regionNoneCannot group
M4983Spondylopathy in diseases classd elswhr, cervicothor regionNoneCannot group
M4984Spondylopathy in diseases classd elswhr, thoracic regionNoneCannot group
M4985Spond in diseases classd elswhr, thoracolumbar regionNoneCannot group
M4986Spondylopathy in diseases classd elswhr, lumbar regionNoneCannot group
M4987Spondylopathy in diseases classd elswhr, lumbosacral regionNoneCannot group
M4988Spond in diseases classd elswhr, sacr/sacrocygl regionNoneCannot group
M4989Spond in diseases classd elswhr, multiple sites in spineNoneCannot 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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