L72.12 is the authoritative medical code for Trichodermal cyst. This classification is used in medical billing and clinical recording to specify the clinical criteria for trichodermal cyst (ICD-10-CM L72.12), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Trichodermal cyst is a billable ICD-10-CM diagnosis code L72.12. Inclusion terms: Trichilemmal (proliferating) cyst. Excludes1 (not coded here): congenital malformations of integument Q84.-.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for L72.12 in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this code.
- Trichilemmal (proliferating) cyst
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- congenital malformations of integument Q84.-
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with L72.12?
Per Excludes1 instructions, L72.12 must not be reported with: congenital malformations of integument (Q84.-).
What conditions are included under L72.12?
Trichodermal cyst includes: Trichilemmal (proliferating) cyst.
Codes in This Family (8)
Official ICD-10-CM classifications in the same code family as L72.12, with their registry titles.
- L72 — Follicular cysts of skin and subcutaneous tissue
- L72.0 — Epidermal cyst
- L72.1 — Pilar and trichodermal cyst
- L72.11 — Pilar cyst
- L72.2 — Steatocystoma multiplex
- L72.3 — Sebaceous cyst
- L72.8 — Other follicular cysts of the skin and subcutaneous tissue
- L72.9 — Follicular cyst of the skin and subcutaneous tissue, unspecified
Indexed Clinical Terms (2)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Cyst (colloid) (mucous) (simple) (retention), trichilemmal (proliferating)
- Cyst (colloid) (mucous) (simple) (retention), trichodermal
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:
ICD Code L76.12
Accidental puncture and laceration of skin and subcutaneous tissue during other procedure