ICD-10 Code for Teratoma

The ICD-10-CM 2027 alphabetic index lists teratoma with the subterms below. More specific codes depend on the details documented, as listed in the official index (9 codes, 3 billable).

Index entries for Teratoma

with embryonal carcinoma, mixed – see Neoplasm, malignant, by site
with malignant transformation – see Neoplasm, malignant, by site
adult (cystic) – see Neoplasm, benign, by site
benign – see Neoplasm, benign, by site
combined with choriocarcinoma – see Neoplasm, malignant, by site
cystic (adult) – see Neoplasm, benign, by site
differentiated – see Neoplasm, benign, by site
embryonal – see also Neoplasm, malignant, by site
- liver – C22.7
immature – see Neoplasm, malignant, by site
liver – C22.7
- adult, benign, cystic, differentiated type or mature – D13.4
malignant – see also Neoplasm, malignant, by site
- anaplastic – see Neoplasm, malignant, by site
- intermediate – see Neoplasm, malignant, by site
  - specified site – see Neoplasm, malignant, by site
  - unspecified site – C62.90
- undifferentiated – see Neoplasm, malignant, by site
mature – see Neoplasm, uncertain behavior, by site
- malignant – see Neoplasm, by site, malignant, by site
ovary – D27.- (header)
- embryonal, immature or malignant – C56- (header)
solid – see Neoplasm, uncertain behavior, by site
testis – C62.9- (header)
- adult, benign, cystic, differentiated type or mature – D29.2- (header)
- scrotal – C62.1- (header)
- undescended – C62.0- (header)

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.