D04.2 is the authoritative medical code for Carcinoma in situ of skin of ear and external auricular canal. This classification is used in medical billing and clinical recording to specify the clinical criteria for carcinoma in situ of skin of ear and external auricular canal (ICD-10-CM D04.2), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Carcinoma in situ of skin of ear and external auricular canal is a non-billable ICD-10-CM category code D04.2. A more specific billable subcode must be selected for claims submission. Includes: Bowen's disease; erythroplasia; grade III intraepithelial neoplasia; Queyrat's erythroplasia. Excludes1 (not coded here): erythroplasia of Queyrat penis NOS D07.4; melanoma in situ D03.-.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for D04.2 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- Bowen's disease
- erythroplasia
- grade III intraepithelial neoplasia
- Queyrat's erythroplasia
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- erythroplasia of Queyrat penis NOS D07.4
- melanoma in situ D03.-
Frequently Asked Questions (FAQ) & Clinical Guidance
Can D04.2 be billed directly?
No. D04.2 (Carcinoma in situ of skin of ear and external auricular canal) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
What can't be coded together with D04.2?
Per Excludes1 instructions, D04.2 must not be reported with: erythroplasia of Queyrat (penis) NOS (D07.4); melanoma in situ (D03.-).
Codes in This Family (28)
Official ICD-10-CM classifications in the same code family as D04.2, with their registry titles.
- D04 — Carcinoma in situ of skin
- D04.0 — Carcinoma in situ of skin of lip
- D04.1 — Carcinoma in situ of skin of eyelid, including canthus
- D04.10 — Carcinoma in situ of skin of unspecified eyelid, including canthus
- D04.11 — Carcinoma in situ of skin of right eyelid, including canthus
- D04.111 — Carcinoma in situ of skin of right upper eyelid, including canthus
- D04.112 — Carcinoma in situ of skin of right lower eyelid, including canthus
- D04.12 — Carcinoma in situ of skin of left eyelid, including canthus
- D04.121 — Carcinoma in situ of skin of left upper eyelid, including canthus
- D04.122 — Carcinoma in situ of skin of left lower eyelid, including canthus
- D04.20 — Carcinoma in situ of skin of unspecified ear and external auricular canal
- D04.21 — Carcinoma in situ of skin of right ear and external auricular canal
- D04.22 — Carcinoma in situ of skin of left ear and external auricular canal
- D04.3 — Carcinoma in situ of skin of other and unspecified parts of face
- D04.30 — Carcinoma in situ of skin of unspecified part of face
- D04.39 — Carcinoma in situ of skin of other parts of face
- D04.4 — Carcinoma in situ of skin of scalp and neck
- D04.5 — Carcinoma in situ of skin of trunk
- D04.6 — Carcinoma in situ of skin of upper limb, including shoulder
- D04.60 — Carcinoma in situ of skin of unspecified upper limb, including shoulder
- D04.61 — Carcinoma in situ of skin of right upper limb, including shoulder
- D04.62 — Carcinoma in situ of skin of left upper limb, including shoulder
- D04.7 — Carcinoma in situ of skin of lower limb, including hip
- D04.70 — Carcinoma in situ of skin of unspecified lower limb, including hip
- D04.71 — Carcinoma in situ of skin of right lower limb, including hip
- D04.72 — Carcinoma in situ of skin of left lower limb, including hip
- D04.8 — Carcinoma in situ of skin of other sites
- D04.9 — Carcinoma in situ of skin, unspecified
Neoplasm Table Sites (27)
Anatomical sites from the official ICD-10-CM Table of Neoplasms that map to this code, with the matching behavior column.
- Neoplasm, neoplastic, auditory, canal (external) (skin) — Ca in situ
- Neoplasm, neoplastic, auricle, ear — Ca in situ
- Neoplasm, neoplastic, auricular canal (external) — Ca in situ
- Neoplasm, neoplastic, canal, auditory (external) — Ca in situ
- Neoplasm, neoplastic, canal, auricular (external) — Ca in situ
- Neoplasm, neoplastic, concha — Ca in situ
- Neoplasm, neoplastic, ear (external) — Ca in situ
- Neoplasm, neoplastic, ear (external), auricle or auris — Ca in situ
- Neoplasm, neoplastic, ear (external), canal, external — Ca in situ
- Neoplasm, neoplastic, ear (external), external meatus — Ca in situ
- Neoplasm, neoplastic, ear (external), lobule — Ca in situ
- Neoplasm, neoplastic, ear (external), skin — Ca in situ
- Neoplasm, neoplastic, earlobe — Ca in situ
- Neoplasm, neoplastic, external, meatus (ear) — Ca in situ
- Neoplasm, neoplastic, helix — Ca in situ
- Neoplasm, neoplastic, meatus external (ear) — Ca in situ
- Neoplasm, neoplastic, pinna NEC (ear) — Ca in situ
- Neoplasm, neoplastic, skin NOS, auditory canal (external) — Ca in situ
- Neoplasm, neoplastic, skin NOS, auricle (ear) — Ca in situ
- Neoplasm, neoplastic, skin NOS, auricular canal (external) — Ca in situ
- Neoplasm, neoplastic, skin NOS, concha — Ca in situ
- Neoplasm, neoplastic, skin NOS, ear (external) — Ca in situ
- Neoplasm, neoplastic, skin NOS, helix — Ca in situ
- Neoplasm, neoplastic, skin NOS, meatus, acoustic (external) — Ca in situ
- Neoplasm, neoplastic, skin NOS, pinna — Ca in situ
- Neoplasm, neoplastic, skin NOS, tragus — Ca in situ
- Neoplasm, neoplastic, tragus — Ca in situ
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: