ICD-10 · PDGM grouping
C44 Other and unspecified malignant neoplasm of skin
All 101 codes in the C44 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
101
Can lead a claim
76
Cannot lead a claim
25
What CMS assigns to C44
76 of the 101 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases; 25 are assigned no clinical group. None of the 101 is assigned a comorbidity subgroup. 76 of the 101 can lead a claim.
Every code in C44
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 |
|---|---|---|---|---|
| C44.0 Other and unspecified malignant neoplasm of skin of lip | ||||
| C44.00 | Unspecified malignant neoplasm of skin of lip | Can lead a claim | K | None |
| C44.01 | Basal cell carcinoma of skin of lip | Can lead a claim | K | None |
| C44.02 | Squamous cell carcinoma of skin of lip | Can lead a claim | K | None |
| C44.09 | Other specified malignant neoplasm of skin of lip | Can lead a claim | K | None |
| C44.1 Other and unspecified malignant neoplasm of skin of eyelid, including canthus | ||||
| C44.10 Unspecified malignant neoplasm of skin of eyelid, including canthus | ||||
| C44.101 | Unspecified malignant neoplasm of skin of unspecified eyelid, including canthusCMS: Unsp malignant neoplasm skin/ unsp eyelid, including canthus | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.102 Unspecified malignant neoplasm of skin of right eyelid, including canthus | ||||
| C44.1021 | Unspecified malignant neoplasm of skin of right upper eyelid, including canthusCMS: Unsp malig neoplasm skin/ right upper eyelid, inc canthus | Can lead a claim | K | None |
| C44.1022 | Unspecified malignant neoplasm of skin of right lower eyelid, including canthusCMS: Unsp malig neoplasm skin/ right lower eyelid, inc canthus | Can lead a claim | K | None |
| C44.109 Unspecified malignant neoplasm of skin of left eyelid, including canthus | ||||
| C44.1091 | Unspecified malignant neoplasm of skin of left upper eyelid, including canthusCMS: Unsp malignant neoplasm skin/ left upper eyelid, inc canthus | Can lead a claim | K | None |
| C44.1092 | Unspecified malignant neoplasm of skin of left lower eyelid, including canthusCMS: Unsp malignant neoplasm skin/ left lower eyelid, inc canthus | Can lead a claim | K | None |
| C44.11 Basal cell carcinoma of skin of eyelid, including canthus | ||||
| C44.111 | Basal cell carcinoma of skin of unspecified eyelid, including canthusCMS: Basal cell carcinoma skin/ unsp eyelid, including canthus | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.112 Basal cell carcinoma of skin of right eyelid, including canthus | ||||
| C44.1121 | Basal cell carcinoma of skin of right upper eyelid, including canthusCMS: Basal cell carcinoma skin/ right upper eyelid, inc canthus | Can lead a claim | K | None |
| C44.1122 | Basal cell carcinoma of skin of right lower eyelid, including canthusCMS: Basal cell carcinoma skin/ right lower eyelid, inc canthus | Can lead a claim | K | None |
| C44.119 Basal cell carcinoma of skin of left eyelid, including canthus | ||||
| C44.1191 | Basal cell carcinoma of skin of left upper eyelid, including canthusCMS: Basal cell carcinoma skin/ left upper eyelid, inc canthus | Can lead a claim | K | None |
| C44.1192 | Basal cell carcinoma of skin of left lower eyelid, including canthusCMS: Basal cell carcinoma skin/ left lower eyelid, inc canthus | Can lead a claim | K | None |
| C44.12 Squamous cell carcinoma of skin of eyelid, including canthus | ||||
| C44.121 | Squamous cell carcinoma of skin of unspecified eyelid, including canthusCMS: Squamous cell carcinoma skin/ unsp eyelid, including canthus | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.122 Squamous cell carcinoma of skin of right eyelid, including canthus | ||||
| C44.1221 | Squamous cell carcinoma of skin of right upper eyelid, including canthusCMS: Squamous cell carcinoma skin/ r upper eyelid, inc canthus | Can lead a claim | K | None |
| C44.1222 | Squamous cell carcinoma of skin of right lower eyelid, including canthusCMS: Squamous cell carcinoma skin/ right low eyelid, inc canthus | Can lead a claim | K | None |
| C44.129 Squamous cell carcinoma of skin of left eyelid, including canthus | ||||
| C44.1291 | Squamous cell carcinoma of skin of left upper eyelid, including canthusCMS: Squamous cell carcinoma skin/ left upper eyelid, inc canthus | Can lead a claim | K | None |
| C44.1292 | Squamous cell carcinoma of skin of left lower eyelid, including canthusCMS: Squamous cell carcinoma skin/ left lower eyelid, inc canthus | Can lead a claim | K | None |
| C44.13 Sebaceous cell carcinoma of skin of eyelid, including canthus | ||||
| C44.131 | Sebaceous cell carcinoma of skin of unspecified eyelid, including canthusCMS: Sebaceous cell carcinoma skin/ unsplid, including canthus | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.132 Sebaceous cell carcinoma of skin of right eyelid, including canthus | ||||
| C44.1321 | Sebaceous cell carcinoma of skin of right upper eyelid, including canthusCMS: Sebaceous cell carcinoma skin/ r upper eyelid, inc canthus | Can lead a claim | K | None |
| C44.1322 | Sebaceous cell carcinoma of skin of right lower eyelid, including canthusCMS: Sebaceous cell carcinoma skin/ right low eyelid, inc canthus | Can lead a claim | K | None |
| C44.139 Sebaceous cell carcinoma of skin of left eyelid, including canthus | ||||
| C44.1391 | Sebaceous cell carcinoma of skin of left upper eyelid, including canthusCMS: Sebaceous cell carcinoma skin/ left upr eyelid, inc canthus | Can lead a claim | K | None |
| C44.1392 | Sebaceous cell carcinoma of skin of left lower eyelid, including canthusCMS: Sebaceous cell carcinoma skin/ left low eyelid, inc canthus | Can lead a claim | K | None |
| C44.19 Other specified malignant neoplasm of skin of eyelid, including canthus | ||||
| C44.191 | Other specified malignant neoplasm of skin of unspecified eyelid, including canthusCMS: Oth malignant neoplasm skin/ unsp eyelid, including canthus | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.192 Other specified malignant neoplasm of skin of right eyelid, including canthus | ||||
| C44.1921 | Other specified malignant neoplasm of skin of right upper eyelid, including canthusCMS: Oth malignant neoplasm skin/ right upper eyelid, inc canthus | Can lead a claim | K | None |
| C44.1922 | Other specified malignant neoplasm of skin of right lower eyelid, including canthusCMS: Oth malignant neoplasm skin/ right lower eyelid, inc canthus | Can lead a claim | K | None |
| C44.199 Other specified malignant neoplasm of skin of left eyelid, including canthus | ||||
| C44.1991 | Other specified malignant neoplasm of skin of left upper eyelid, including canthusCMS: Oth malignant neoplasm skin/ left upper eyelid, inc canthus | Can lead a claim | K | None |
| C44.1992 | Other specified malignant neoplasm of skin of left lower eyelid, including canthusCMS: Oth malignant neoplasm skin/ left lower eyelid, inc canthus | Can lead a claim | K | None |
| C44.2 Other and unspecified malignant neoplasm of skin of ear and external auricular canal | ||||
| C44.20 Unspecified malignant neoplasm of skin of ear and external auricular canal | ||||
| C44.201 | Unspecified malignant neoplasm of skin of unspecified ear and external auricular canalCMS: Unsp malig neoplasm skin/ unsp ear and external auric canal | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.202 | Unspecified malignant neoplasm of skin of right ear and external auricular canalCMS: Unsp malig neoplasm skin/ right ear and external auric canal | Can lead a claim | K | None |
| C44.209 | Unspecified malignant neoplasm of skin of left ear and external auricular canalCMS: Unsp malig neoplasm skin/ left ear and external auric canal | Can lead a claim | K | None |
| C44.21 Basal cell carcinoma of skin of ear and external auricular canal | ||||
| C44.211 | Basal cell carcinoma of skin of unspecified ear and external auricular canalCMS: Basal cell carcinoma skin/ unsp ear and external auric canal | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.212 | Basal cell carcinoma of skin of right ear and external auricular canalCMS: Basal cell carcinoma skin/ r ear and external auric canal | Can lead a claim | K | None |
| C44.219 | Basal cell carcinoma of skin of left ear and external auricular canalCMS: Basal cell carcinoma skin/ left ear and external auric canal | Can lead a claim | K | None |
| C44.22 Squamous cell carcinoma of skin of ear and external auricular canal | ||||
| C44.221 | Squamous cell carcinoma of skin of unspecified ear and external auricular canalCMS: Squamous cell carcinoma skin/ unsp ear and extrn auric canal | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.222 | Squamous cell carcinoma of skin of right ear and external auricular canalCMS: Squamous cell carcinoma skin/ r ear and external auric canal | Can lead a claim | K | None |
| C44.229 | Squamous cell carcinoma of skin of left ear and external auricular canalCMS: Squamous cell carcinoma skin/ left ear and extrn auric canal | Can lead a claim | K | None |
| C44.29 Other specified malignant neoplasm of skin of ear and external auricular canal | ||||
| C44.291 | Other specified malignant neoplasm of skin of unspecified ear and external auricular canalCMS: Oth malig neoplasm skin/ unsp ear and external auric canal | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.292 | Other specified malignant neoplasm of skin of right ear and external auricular canalCMS: Oth malig neoplasm skin/ right ear and external auric canal | Can lead a claim | K | None |
| C44.299 | Other specified malignant neoplasm of skin of left ear and external auricular canalCMS: Oth malig neoplasm skin/ left ear and external auric canal | Can lead a claim | K | None |
| C44.3 Other and unspecified malignant neoplasm of skin of other and unspecified parts of face | ||||
| C44.30 Unspecified malignant neoplasm of skin of other and unspecified parts of face | ||||
| C44.300 | Unspecified malignant neoplasm of skin of unspecified part of faceCMS: Unsp malignant neoplasm of skin of unspecified part of face | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.301 | Unspecified malignant neoplasm of skin of nose | Can lead a claim | K | None |
| C44.309 | Unspecified malignant neoplasm of skin of other parts of faceCMS: Unsp malignant neoplasm of skin of other parts of face | Can lead a claim | K | None |
| C44.31 Basal cell carcinoma of skin of other and unspecified parts of face | ||||
| C44.310 | Basal cell carcinoma of skin of unspecified parts of face | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.311 | Basal cell carcinoma of skin of nose | Can lead a claim | K | None |
| C44.319 | Basal cell carcinoma of skin of other parts of face | Can lead a claim | K | None |
| C44.32 Squamous cell carcinoma of skin of other and unspecified parts of face | ||||
| C44.320 | Squamous cell carcinoma of skin of unspecified parts of face | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.321 | Squamous cell carcinoma of skin of nose | Can lead a claim | K | None |
| C44.329 | Squamous cell carcinoma of skin of other parts of face | Can lead a claim | K | None |
| C44.39 Other specified malignant neoplasm of skin of other and unspecified parts of face | ||||
| C44.390 | Other specified malignant neoplasm of skin of unspecified parts of faceCMS: Oth malignant neoplasm of skin of unspecified parts of face | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.391 | Other specified malignant neoplasm of skin of nose | Can lead a claim | K | None |
| C44.399 | Other specified malignant neoplasm of skin of other parts of faceCMS: Oth malignant neoplasm of skin of other parts of face | Can lead a claim | K | None |
| C44.4 Other and unspecified malignant neoplasm of skin of scalp and neck | ||||
| C44.40 | Unspecified malignant neoplasm of skin of scalp and neck | Can lead a claim | K | None |
| C44.41 | Basal cell carcinoma of skin of scalp and neck | Can lead a claim | K | None |
| C44.42 | Squamous cell carcinoma of skin of scalp and neck | Can lead a claim | K | None |
| C44.49 | Other specified malignant neoplasm of skin of scalp and neck | Can lead a claim | K | None |
| C44.5 Other and unspecified malignant neoplasm of skin of trunk | ||||
| C44.50 Unspecified malignant neoplasm of skin of trunk | ||||
| C44.500 | Unspecified malignant neoplasm of anal skin | Can lead a claim | K | None |
| C44.501 | Unspecified malignant neoplasm of skin of breast | Can lead a claim | K | None |
| C44.509 | Unspecified malignant neoplasm of skin of other part of trunkCMS: Unsp malignant neoplasm of skin of other part of trunk | Can lead a claim | K | None |
| C44.51 Basal cell carcinoma of skin of trunk | ||||
| C44.510 | Basal cell carcinoma of anal skin | Can lead a claim | K | None |
| C44.511 | Basal cell carcinoma of skin of breast | Can lead a claim | K | None |
| C44.519 | Basal cell carcinoma of skin of other part of trunk | Can lead a claim | K | None |
| C44.52 Squamous cell carcinoma of skin of trunk | ||||
| C44.520 | Squamous cell carcinoma of anal skin | Can lead a claim | K | None |
| C44.521 | Squamous cell carcinoma of skin of breast | Can lead a claim | K | None |
| C44.529 | Squamous cell carcinoma of skin of other part of trunk | Can lead a claim | K | None |
| C44.59 Other specified malignant neoplasm of skin of trunk | ||||
| C44.590 | Other specified malignant neoplasm of anal skin | Can lead a claim | K | None |
| C44.591 | Other specified malignant neoplasm of skin of breast | Can lead a claim | K | None |
| C44.599 | Other specified malignant neoplasm of skin of other part of trunkCMS: Oth malignant neoplasm of skin of other part of trunk | Can lead a claim | K | None |
| C44.6 Other and unspecified malignant neoplasm of skin of upper limb, including shoulder | ||||
| C44.60 Unspecified malignant neoplasm of skin of upper limb, including shoulder | ||||
| C44.601 | Unspecified malignant neoplasm of skin of unspecified upper limb, including shoulderCMS: Unsp malignant neoplasm skin/ unsp upper limb, inc shoulder | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.602 | Unspecified malignant neoplasm of skin of right upper limb, including shoulderCMS: Unsp malignant neoplasm skin/ right upper limb, inc shoulder | Can lead a claim | K | None |
| C44.609 | Unspecified malignant neoplasm of skin of left upper limb, including shoulderCMS: Unsp malignant neoplasm skin/ left upper limb, inc shoulder | Can lead a claim | K | None |
| C44.61 Basal cell carcinoma of skin of upper limb, including shoulder | ||||
| C44.611 | Basal cell carcinoma of skin of unspecified upper limb, including shoulderCMS: Basal cell carcinoma skin/ unsp upper limb, inc shoulder | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.612 | Basal cell carcinoma of skin of right upper limb, including shoulderCMS: Basal cell carcinoma skin/ right upper limb, inc shoulder | Can lead a claim | K | None |
| C44.619 | Basal cell carcinoma of skin of left upper limb, including shoulderCMS: Basal cell carcinoma skin/ left upper limb, inc shoulder | Can lead a claim | K | None |
| C44.62 Squamous cell carcinoma of skin of upper limb, including shoulder | ||||
| C44.621 | Squamous cell carcinoma of skin of unspecified upper limb, including shoulderCMS: Squamous cell carcinoma skin/ unsp upper limb, inc shoulder | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.622 | Squamous cell carcinoma of skin of right upper limb, including shoulderCMS: Squamous cell carcinoma skin/ right upper limb, inc shoulder | Can lead a claim | K | None |
| C44.629 | Squamous cell carcinoma of skin of left upper limb, including shoulderCMS: Squamous cell carcinoma skin/ left upper limb, inc shoulder | Can lead a claim | K | None |
| C44.69 Other specified malignant neoplasm of skin of upper limb, including shoulder | ||||
| C44.691 | Other specified malignant neoplasm of skin of unspecified upper limb, including shoulderCMS: Oth malignant neoplasm skin/ unsp upper limb, inc shoulder | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.692 | Other specified malignant neoplasm of skin of right upper limb, including shoulderCMS: Oth malignant neoplasm skin/ right upper limb, inc shoulder | Can lead a claim | K | None |
| C44.699 | Other specified malignant neoplasm of skin of left upper limb, including shoulderCMS: Oth malignant neoplasm skin/ left upper limb, inc shoulder | Can lead a claim | K | None |
| C44.7 Other and unspecified malignant neoplasm of skin of lower limb, including hip | ||||
| C44.70 Unspecified malignant neoplasm of skin of lower limb, including hip | ||||
| C44.701 | Unspecified malignant neoplasm of skin of unspecified lower limb, including hipCMS: Unsp malignant neoplasm skin/ unsp lower limb, including hip | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.702 | Unspecified malignant neoplasm of skin of right lower limb, including hipCMS: Unsp malignant neoplasm skin/ right lower limb, inc hip | Can lead a claim | K | None |
| C44.709 | Unspecified malignant neoplasm of skin of left lower limb, including hipCMS: Unsp malignant neoplasm skin/ left lower limb, including hip | Can lead a claim | K | None |
| C44.71 Basal cell carcinoma of skin of lower limb, including hip | ||||
| C44.711 | Basal cell carcinoma of skin of unspecified lower limb, including hipCMS: Basal cell carcinoma skin/ unsp lower limb, including hip | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.712 | Basal cell carcinoma of skin of right lower limb, including hipCMS: Basal cell carcinoma skin/ right lower limb, including hip | Can lead a claim | K | None |
| C44.719 | Basal cell carcinoma of skin of left lower limb, including hipCMS: Basal cell carcinoma skin/ left lower limb, including hip | Can lead a claim | K | None |
| C44.72 Squamous cell carcinoma of skin of lower limb, including hip | ||||
| C44.721 | Squamous cell carcinoma of skin of unspecified lower limb, including hipCMS: Squamous cell carcinoma skin/ unsp lower limb, including hip | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.722 | Squamous cell carcinoma of skin of right lower limb, including hipCMS: Squamous cell carcinoma skin/ right lower limb, inc hip | Can lead a claim | K | None |
| C44.729 | Squamous cell carcinoma of skin of left lower limb, including hipCMS: Squamous cell carcinoma skin/ left lower limb, including hip | Can lead a claim | K | None |
| C44.79 Other specified malignant neoplasm of skin of lower limb, including hip | ||||
| C44.791 | Other specified malignant neoplasm of skin of unspecified lower limb, including hipCMS: Oth malignant neoplasm skin/ unsp lower limb, including hip | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.792 | Other specified malignant neoplasm of skin of right lower limb, including hipCMS: Oth malignant neoplasm skin/ right lower limb, including hip | Can lead a claim | K | None |
| C44.799 | Other specified malignant neoplasm of skin of left lower limb, including hipCMS: Oth malignant neoplasm skin/ left lower limb, including hip | Can lead a claim | K | None |
| C44.8 Other and unspecified malignant neoplasm of overlapping sites of skin | ||||
| C44.80 | Unspecified malignant neoplasm of overlapping sites of skin | Can lead a claim | K | None |
| C44.81 | Basal cell carcinoma of overlapping sites of skin | Can lead a claim | K | None |
| C44.82 | Squamous cell carcinoma of overlapping sites of skin | Can lead a claim | K | None |
| C44.89 | Other specified malignant neoplasm of overlapping sites of skinCMS: Oth malignant neoplasm of overlapping sites of skin | Can lead a claim | K | None |
| C44.9 Other and unspecified malignant neoplasm of skin, unspecified | ||||
| C44.90 | Unspecified malignant neoplasm of skin, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.91 | Basal cell carcinoma of skin, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.92 | Squamous cell carcinoma of skin, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C44.99 | Other specified malignant neoplasm of skin, unspecified | 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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