ICD-10 · PDGM grouping
H74 Other disorders of middle ear mastoid
All 36 codes in the H74 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
36
Can lead a claim
24
Cannot lead a claim
12
What CMS assigns to H74
24 of the 36 codes group to MMTA - Other; 12 are assigned no clinical group. None of the 36 is assigned a comorbidity subgroup. 24 of the 36 can lead a claim.
Every code in H74
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 |
|---|---|---|---|---|
| H74.0 Tympanosclerosis | ||||
| H74.01 | Tympanosclerosis, right ear | Can lead a claim | A | None |
| H74.02 | Tympanosclerosis, left ear | Can lead a claim | A | None |
| H74.03 | Tympanosclerosis, bilateral | Can lead a claim | A | None |
| H74.09 | Tympanosclerosis, unspecified ear | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H74.1 Adhesive middle ear disease | ||||
| H74.11 | Adhesive right middle ear disease | Can lead a claim | A | None |
| H74.12 | Adhesive left middle ear disease | Can lead a claim | A | None |
| H74.13 | Adhesive middle ear disease, bilateral | Can lead a claim | A | None |
| H74.19 | Adhesive middle ear disease, unspecified ear | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H74.2 Discontinuity and dislocation of ear ossicles | ||||
| H74.20 | Discontinuity and dislocation of ear ossicles, unspecified earCMS: Discontinuity and dislocation of ear ossicles, unsp ear | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H74.21 | Discontinuity and dislocation of right ear ossicles | Can lead a claim | A | None |
| H74.22 | Discontinuity and dislocation of left ear ossicles | Can lead a claim | A | None |
| H74.23 | Discontinuity and dislocation of ear ossicles, bilateral | Can lead a claim | A | None |
| H74.3 Other acquired abnormalities of ear ossicles | ||||
| H74.31 Ankylosis of ear ossicles | ||||
| H74.311 | Ankylosis of ear ossicles, right ear | Can lead a claim | A | None |
| H74.312 | Ankylosis of ear ossicles, left ear | Can lead a claim | A | None |
| H74.313 | Ankylosis of ear ossicles, bilateral | Can lead a claim | A | None |
| H74.319 | Ankylosis of ear ossicles, unspecified ear | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H74.32 Partial loss of ear ossicles | ||||
| H74.321 | Partial loss of ear ossicles, right ear | Can lead a claim | A | None |
| H74.322 | Partial loss of ear ossicles, left ear | Can lead a claim | A | None |
| H74.323 | Partial loss of ear ossicles, bilateral | Can lead a claim | A | None |
| H74.329 | Partial loss of ear ossicles, unspecified ear | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H74.39 Other acquired abnormalities of ear ossicles | ||||
| H74.391 | Other acquired abnormalities of right ear ossicles | Can lead a claim | A | None |
| H74.392 | Other acquired abnormalities of left ear ossicles | Can lead a claim | A | None |
| H74.393 | Other acquired abnormalities of ear ossicles, bilateral | Can lead a claim | A | None |
| H74.399 | Other acquired abnormalities of ear ossicles, unspecified earCMS: Other acquired abnormalities of ear ossicles, unsp ear | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H74.4 Polyp of middle ear | ||||
| H74.40 | Polyp of middle ear, unspecified ear | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H74.41 | Polyp of right middle ear | Can lead a claim | A | None |
| H74.42 | Polyp of left middle ear | Can lead a claim | A | None |
| H74.43 | Polyp of middle ear, bilateral | Can lead a claim | A | None |
| H74.8 Other specified disorders of middle ear and mastoid | ||||
| H74.8X Other specified disorders of middle ear and mastoid | ||||
| H74.8X1 | Other specified disorders of right middle ear and mastoid | Can lead a claim | A | None |
| H74.8X2 | Other specified disorders of left middle ear and mastoid | Can lead a claim | A | None |
| H74.8X3 | Other specified disorders of middle ear and mastoid, bilateralCMS: Oth disrd of middle ear and mastoid, bilateral | Can lead a claim | A | None |
| H74.8X9 | Other specified disorders of middle ear and mastoid, unspecified earCMS: Oth disrd of middle ear and mastoid, unspecified ear | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H74.9 Unspecified disorder of middle ear and mastoid | ||||
| H74.90 | Unspecified disorder of middle ear and mastoid, unspecified earCMS: Unsp disorder of middle ear and mastoid, unspecified ear | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H74.91 | Unspecified disorder of right middle ear and mastoid | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H74.92 | Unspecified disorder of left middle ear and mastoid | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H74.93 | Unspecified disorder of middle ear and mastoid, bilateral | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | 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.
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