ICD-10 · PDGM grouping
M46 Other inflammatory spondylopathies
All 70 codes in the M46 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in family
70
Can lead a claim
63
Cannot lead a claim
7
What CMS assigns to M46
63 of the 70 codes group to Musculoskeletal Rehabilitation; 7 are assigned no clinical group. None of the 70 is assigned a comorbidity subgroup. 63 of the 70 can lead a claim.
Every code in M46
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| M46.0 Spinal enthesopathy | ||||
| M46.00 | Spinal enthesopathy, site unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M46.01 | Spinal enthesopathy, occipito-atlanto-axial region | Can lead a claim | E | None |
| M46.02 | Spinal enthesopathy, cervical region | Can lead a claim | E | None |
| M46.03 | Spinal enthesopathy, cervicothoracic region | Can lead a claim | E | None |
| M46.04 | Spinal enthesopathy, thoracic region | Can lead a claim | E | None |
| M46.05 | Spinal enthesopathy, thoracolumbar region | Can lead a claim | E | None |
| M46.06 | Spinal enthesopathy, lumbar region | Can lead a claim | E | None |
| M46.07 | Spinal enthesopathy, lumbosacral region | Can lead a claim | E | None |
| M46.08 | Spinal enthesopathy, sacral and sacrococcygeal region | Can lead a claim | E | None |
| M46.09 | Spinal enthesopathy, multiple sites in spine | Can lead a claim | E | None |
| M46.1 | Sacroiliitis, not elsewhere classified | Can lead a claim | E | None |
| M46.2 Osteomyelitis of vertebra | ||||
| M46.20 | Osteomyelitis of vertebra, site unspecified | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| M46.21 | Osteomyelitis of vertebra, occipito-atlanto-axial region | Can lead a claim | E | None |
| M46.22 | Osteomyelitis of vertebra, cervical region | Can lead a claim | E | None |
| M46.23 | Osteomyelitis of vertebra, cervicothoracic region | Can lead a claim | E | None |
| M46.24 | Osteomyelitis of vertebra, thoracic region | Can lead a claim | E | None |
| M46.25 | Osteomyelitis of vertebra, thoracolumbar region | Can lead a claim | E | None |
| M46.26 | Osteomyelitis of vertebra, lumbar region | Can lead a claim | E | None |
| M46.27 | Osteomyelitis of vertebra, lumbosacral region | Can lead a claim | E | None |
| M46.28 | Osteomyelitis of vertebra, sacral and sacrococcygeal region | Can lead a claim | E | None |
| M46.3 Infection of intervertebral disc (pyogenic) | ||||
| M46.30 | Infection of intervertebral disc (pyogenic), site unspecifiedCMS: Infection of intervertebral disc (pyogenic), site unsp | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| M46.31 | Infection of intervertebral disc (pyogenic), occipito-atlanto-axial regionCMS: Infection of intvrt disc (pyogenic), occipt-atlan-ax region | Can lead a claim | E | None |
| M46.32 | Infection of intervertebral disc (pyogenic), cervical region | Can lead a claim | E | None |
| M46.33 | Infection of intervertebral disc (pyogenic), cervicothoracic regionCMS: Infection of intvrt disc (pyogenic), cervicothor region | Can lead a claim | E | None |
| M46.34 | Infection of intervertebral disc (pyogenic), thoracic region | Can lead a claim | E | None |
| M46.35 | Infection of intervertebral disc (pyogenic), thoracolumbar regionCMS: Infection of intvrt disc (pyogenic), thoracolumbar region | Can lead a claim | E | None |
| M46.36 | Infection of intervertebral disc (pyogenic), lumbar region | Can lead a claim | E | None |
| M46.37 | Infection of intervertebral disc (pyogenic), lumbosacral regionCMS: Infection of intvrt disc (pyogenic), lumbosacral region | Can lead a claim | E | None |
| M46.38 | Infection of intervertebral disc (pyogenic), sacral and sacrococcygeal regionCMS: Infection of intvrt disc (pyogenic), sacr/sacrocygl region | Can lead a claim | E | None |
| M46.39 | Infection of intervertebral disc (pyogenic), multiple sites in spineCMS: Infection of intvrt disc (pyogenic), multiple sites in spine | Can lead a claim | E | None |
| M46.4 Discitis, unspecified | ||||
| M46.40 | Discitis, unspecified, site unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M46.41 | Discitis, unspecified, occipito-atlanto-axial region | Can lead a claim | E | None |
| M46.42 | Discitis, unspecified, cervical region | Can lead a claim | E | None |
| M46.43 | Discitis, unspecified, cervicothoracic region | Can lead a claim | E | None |
| M46.44 | Discitis, unspecified, thoracic region | Can lead a claim | E | None |
| M46.45 | Discitis, unspecified, thoracolumbar region | Can lead a claim | E | None |
| M46.46 | Discitis, unspecified, lumbar region | Can lead a claim | E | None |
| M46.47 | Discitis, unspecified, lumbosacral region | Can lead a claim | E | None |
| M46.48 | Discitis, unspecified, sacral and sacrococcygeal region | Can lead a claim | E | None |
| M46.49 | Discitis, unspecified, multiple sites in spine | Can lead a claim | E | None |
| M46.5 Other infective spondylopathies | ||||
| M46.50 | Other infective spondylopathies, site unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M46.51 | Other infective spondylopathies, occipito-atlanto-axial regionCMS: Oth infective spondylopathies, occipito-atlanto-axial region | Can lead a claim | E | None |
| M46.52 | Other infective spondylopathies, cervical region | Can lead a claim | E | None |
| M46.53 | Other infective spondylopathies, cervicothoracic region | Can lead a claim | E | None |
| M46.54 | Other infective spondylopathies, thoracic region | Can lead a claim | E | None |
| M46.55 | Other infective spondylopathies, thoracolumbar region | Can lead a claim | E | None |
| M46.56 | Other infective spondylopathies, lumbar region | Can lead a claim | E | None |
| M46.57 | Other infective spondylopathies, lumbosacral region | Can lead a claim | E | None |
| M46.58 | Other infective spondylopathies, sacral and sacrococcygeal regionCMS: Oth infective spondylopathies, sacr/sacrocygl region | Can lead a claim | E | None |
| M46.59 | Other infective spondylopathies, multiple sites in spine | Can lead a claim | E | None |
| M46.8 Other specified inflammatory spondylopathies | ||||
| M46.80 | Other specified inflammatory spondylopathies, site unspecifiedCMS: Oth inflammatory spondylopathies, site unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M46.81 | Other specified inflammatory spondylopathies, occipito-atlanto-axial regionCMS: Oth inflammatory spondylopathies, occipt-atlan-ax region | Can lead a claim | E | None |
| M46.82 | Other specified inflammatory spondylopathies, cervical regionCMS: Oth inflammatory spondylopathies, cervical region | Can lead a claim | E | None |
| M46.83 | Other specified inflammatory spondylopathies, cervicothoracic regionCMS: Oth inflammatory spondylopathies, cervicothoracic region | Can lead a claim | E | None |
| M46.84 | Other specified inflammatory spondylopathies, thoracic regionCMS: Oth inflammatory spondylopathies, thoracic region | Can lead a claim | E | None |
| M46.85 | Other specified inflammatory spondylopathies, thoracolumbar regionCMS: Oth inflammatory spondylopathies, thoracolumbar region | Can lead a claim | E | None |
| M46.86 | Other specified inflammatory spondylopathies, lumbar region | Can lead a claim | E | None |
| M46.87 | Other specified inflammatory spondylopathies, lumbosacral regionCMS: Oth inflammatory spondylopathies, lumbosacral region | Can lead a claim | E | None |
| M46.88 | Other specified inflammatory spondylopathies, sacral and sacrococcygeal regionCMS: Oth inflammatory spondylopathies, sacr/sacrocygl region | Can lead a claim | E | None |
| M46.89 | Other specified inflammatory spondylopathies, multiple sites in spineCMS: Oth inflammatory spondylopathies, multiple sites in spine | Can lead a claim | E | None |
| M46.9 Unspecified inflammatory spondylopathy | ||||
| M46.90 | Unspecified inflammatory spondylopathy, site unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M46.91 | Unspecified inflammatory spondylopathy, occipito-atlanto-axial regionCMS: Unsp inflammatory spondylopathy, occipt-atlan-ax region | Can lead a claim | E | None |
| M46.92 | Unspecified inflammatory spondylopathy, cervical region | Can lead a claim | E | None |
| M46.93 | Unspecified inflammatory spondylopathy, cervicothoracic regionCMS: Unsp inflammatory spondylopathy, cervicothoracic region | Can lead a claim | E | None |
| M46.94 | Unspecified inflammatory spondylopathy, thoracic region | Can lead a claim | E | None |
| M46.95 | Unspecified inflammatory spondylopathy, thoracolumbar region | Can lead a claim | E | None |
| M46.96 | Unspecified inflammatory spondylopathy, lumbar region | Can lead a claim | E | None |
| M46.97 | Unspecified inflammatory spondylopathy, lumbosacral region | Can lead a claim | E | None |
| M46.98 | Unspecified inflammatory spondylopathy, sacral and sacrococcygeal regionCMS: Unsp inflammatory spondylopathy, sacr/sacrocygl region | Can lead a claim | E | None |
| M46.99 | Unspecified inflammatory spondylopathy, multiple sites in spineCMS: Unsp inflammatory spondylopathy, multiple sites in spine | Can lead a claim | E | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. 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.
The monthly home health regs digest
What CMS changed, what's due next, and what to do about it — one email a month, no fluff. Read the first issue