2020 ICD-10-CM Diagnosis Code L72.12

Trichodermal cyst

    2016 2017 2018 2019 2020 Billable/Specific Code
  • L72.12 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM L72.12 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of L72.12 - other international versions of ICD-10 L72.12 may differ.
Applicable To
  • Trichilemmal (proliferating) cyst
The following code(s) above L72.12 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to L72.12:
  • L00-L99
    2020 ICD-10-CM Range L00-L99

    Diseases of the skin and subcutaneous tissue

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • lipomelanotic reticulosis (I89.8)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    • systemic connective tissue disorders (M30-M36)
    • viral warts (B07.-)
    Diseases of the skin and subcutaneous tissue
  • L60-L75
    2020 ICD-10-CM Range L60-L75

    Disorders of skin appendages

    Type 1 Excludes
    • congenital malformations of integument (Q84.-)
    Disorders of skin appendages
Clinical Information
  • A neoplasm with tricholemmal differentiation. It affects women more frequently than men. It usually presents on the scalp as a solitary, multilobular, large, exophytic mass. Morphologically, it may display benign cytological features and appear as a circumscribed solid-cystic neoplasm or it may display malignant characteristics and invasive features. Cases without malignant characteristics usually have an indolent course. Complete surgical excision is recommended in such cases to avoid recurrences and to allow complete examination of the specimen. Cases with malignant characteristics may have a locally aggressive clinical course, recur, or metastasize.
ICD-10-CM L72.12 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 606 Minor skin disorders with mcc
  • 607 Minor skin disorders without mcc

Convert L72.12 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
Code annotations containing back-references to L72.12:
  • Type 2 Excludes: L72.3
    ICD-10-CM Diagnosis Code L72.3

    Sebaceous cyst

      2016 2017 2018 2019 2020 Billable/Specific Code
    Type 2 Excludes
    • pilar cyst (L72.11)
    • trichilemmal (proliferating) cyst (L72.12)

Diagnosis Index entries containing back-references to L72.12:
  • Cyst (colloid) (mucous) (simple) (retention)
    • trichilemmal L72.12 (proliferating)
    • trichodermal L72.12

ICD-10-CM Codes Adjacent To L72.12
L70.9 Acne, unspecified
L71 Rosacea
L71.0 Perioral dermatitis
L71.1 Rhinophyma
L71.8 Other rosacea
L71.9 Rosacea, unspecified
L72 Follicular cysts of skin and subcutaneous tissue
L72.0 Epidermal cyst
L72.1 Pilar and trichodermal cyst
L72.11 Pilar cyst
L72.12 Trichodermal 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
L73 Other follicular disorders
L73.0 Acne keloid
L73.1 Pseudofolliculitis barbae
L73.2 Hidradenitis suppurativa
L73.8 Other specified follicular disorders
L73.9 Follicular disorder, unspecified

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.