ICD-10-CM Table of Neoplasms · FY 2026 Letter T

Table of Neoplasms: Anatomical Sites Starting With T ICD-10-CM

The letter T section of the FY 2026 Table of Neoplasms covers 72 anatomical site entries under 29 top-level anatomical sites. Each row carries up to six ICD-10-CM codes, one per behavior column, and sub-entries are indented under their parent exactly as the printed CMS table nests them.

✓ Built from the official CMS FY 2026 datasetEffective Oct 1, 2025 – Sep 30, 2026

Anatomical site Entries

Top-Level Anatomical sites

Code Columns

Letter

Column 1

Malignant Primary

Cancer at site of origin

Column 2

Malignant Secondary

Metastatic spread

Column 3

Ca In Situ

Non-invasive, early stage

Column 4

Benign

Non-cancerous

Column 5

Uncertain Behavior

Behavior undeterminable

Column 6

Unspecified Behavior

Behavior not documented

A B C D E F G H I J K L M N O P R STU V W X Z

ICD-10-CM

Table of Neoplasms: T 72 entries

72 of 72 shown

Anatomical Site	Malignant Primary	Malignant Secondary	Ca In Situ	Benign	Uncertain Behavior	Unspecified Behavior
tapetum, brain	C71.8	C79.31	–	D33.2	D43.2	D49.6
tarsus (any bone)	C40.3	C79.51	–	D16.3	–	–
temple (skin)See Also: Neoplasm, skin, face	C44.309	C79.2	D04.39	D23.39	D48.5	D49.2
temporal	C41.0	C79.51	–	D16.4	D48.0	D49.2
bone	C41.0	C79.51	–	D16.4	D48.0	D49.2
lobe or pole	C71.2	C79.31	–	D33.0	D43.0	D49.6
region	C76.0	C79.89	D09.8	D36.7	D48.7	D49.89
skinSee Also: Neoplasm, skin, face	C44.309	C79.2	D04.39	D23.39	D48.5	D49.2
tendon (sheath)	–	–	–	–	–	–
tentorium (cerebelli)	C70.0	C79.32	–	D32.0	D42.0	D49.7
testis, testes	C62.9	C79.82	D07.69	D29.2	D40.1	D49.59
descended	C62.1	C79.82	D07.69	D29.2	D40.1	D49.59
ectopic	C62.0	C79.82	D07.69	D29.2	D40.1	D49.59
retained	C62.0	C79.82	D07.69	D29.2	D40.1	D49.59
scrotal	C62.1	C79.82	D07.69	D29.2	D40.1	D49.59
undescended	C62.0	C79.82	D07.69	D29.2	D40.1	D49.59
unspecified whether descended or undescended	C62.9	C79.82	D07.69	D29.2	D40.1	D49.59
thalamus	C71.0	C79.31	–	D33.0	D43.0	D49.6
thigh NEC	C76.5	C79.89	D04.7	D36.7	D48.7	D49.89
thorax, thoracic (cavity) (organs NEC)	C76.1	C79.89	D09.8	D36.7	D48.7	D49.89
duct	C49.3	C79.89	–	D21.3	D48.1	D49.2
wall NEC	C76.1	C79.89	D09.8	D36.7	D48.7	D49.89
throat	C14.0	C79.89	D00.08	D10.9	D37.05	D49.0
thumb NEC	C76.4	C79.89	D04.6	D36.7	D48.7	D49.89
thymus (gland)	C37	C79.89	D09.3	D15.0	D38.4	D49.89
thyroglossal duct	C73	C79.89	D09.3	D34	D44.0	D49.7
thyroid (gland)	C73	C79.89	D09.3	D34	D44.0	D49.7
cartilage	C32.3	C78.39	D02.0	D14.1	D38.0	D49.1
tibia (any part)	C40.2	C79.51	–	D16.2	–	–
toe NEC	C76.5	C79.89	D04.7	D36.7	D48.7	D49.89
tongue	C02.9	C79.89	D00.07	D10.1	D37.02	D49.0
anterior (two-thirds) NEC	C02.3	C79.89	D00.07	D10.1	D37.02	D49.0
dorsal surface	C02.0	C79.89	D00.07	D10.1	D37.02	D49.0
ventral surface	C02.2	C79.89	D00.07	D10.1	D37.02	D49.0
base (dorsal surface)	C01	C79.89	D00.07	D10.1	D37.02	D49.0
border (lateral)	C02.1	C79.89	D00.07	D10.1	D37.02	D49.0
dorsal surface NEC	C02.0	C79.89	D00.07	D10.1	D37.02	D49.0
fixed part NEC	C01	C79.89	D00.07	D10.1	D37.02	D49.0
foreamen cecum	C02.0	C79.89	D00.07	D10.1	D37.02	D49.0
frenulum linguae	C02.2	C79.89	D00.07	D10.1	D37.02	D49.0
junctional zone	C02.8	C79.89	D00.07	D10.1	D37.02	D49.0
margin (lateral)	C02.1	C79.89	D00.07	D10.1	D37.02	D49.0
midline NEC	C02.0	C79.89	D00.07	D10.1	D37.02	D49.0
mobile part NEC	C02.3	C79.89	D00.07	D10.1	D37.02	D49.0
overlapping lesion	C02.8	–	–	–	–	–
posterior (third)	C01	C79.89	D00.07	D10.1	D37.02	D49.0
root	C01	C79.89	D00.07	D10.1	D37.02	D49.0
surface (dorsal)	C02.0	C79.89	D00.07	D10.1	D37.02	D49.0
base	C01	C79.89	D00.07	D10.1	D37.02	D49.0
ventral	C02.2	C79.89	D00.07	D10.1	D37.02	D49.0
tip	C02.1	C79.89	D00.07	D10.1	D37.02	D49.0
tonsil	C02.4	C79.89	D00.07	D10.1	D37.02	D49.0
tonsil	C09.9	C79.89	D00.08	D10.4	D37.05	D49.0
fauces, faucial	C09.9	C79.89	D00.08	D10.4	D37.05	D49.0
lingual	C02.4	C79.89	D00.07	D10.1	D37.02	D49.0
overlapping sites	C09.8	–	–	–	–	–
palatine	C09.9	C79.89	D00.08	D10.4	D37.05	D49.0
pharyngeal	C11.1	C79.89	D00.08	D10.6	D37.05	D49.0
pillar (anterior) (posterior)	C09.1	C79.89	D00.08	D10.5	D37.05	D49.0
tonsillar fossa	C09.0	C79.89	D00.08	D10.5	D37.05	D49.0
tooth socket NEC	C03.9	C79.89	D00.03	D10.39	D37.09	D49.0
trachea (cartilage) (mucosa)	C33	C78.39	D02.1	D14.2	D38.1	D49.1
overlapping lesion with bronchus or lung	C34.8	–	–	–	–	–
tracheobronchial	C34.8	C78.39	D02.1	D14.2	D38.1	D49.1
overlapping lesion with lung	C34.8	–	–	–	–	–
tragusSee Also: Neoplasm, skin, ear	C44.20	C79.2	D04.2	D23.2	D48.5	D49.2
trunk NEC	C76.8	C79.89	D04.5	D36.7	D48.7	D49.89
tubo-ovarian	C57.8	C79.82	D07.39	D28.7	D39.8	D49.59
tunica vaginalis	C63.7	C79.82	D07.69	D29.8	D40.8	D49.59
turbinate (bone)	C41.0	C79.51	–	D16.4	D48.0	D49.2
nasal	C30.0	C78.39	D02.3	D14.0	D38.5	D49.1
tympanic cavity	C30.1	C78.39	D02.3	D14.0	D38.5	D49.1

Indented rows are sub-entries of the entry above them. The filter matches the full path, so typing a parent term finds its sub-entries too.

Questions About This Page

How do I pick the right column?

The pathology or clinical documentation names the behavior. When the description of the neoplasm names the behavior, that description overrides the Index guidance, and the matching column supplies the code.

Why are some cells empty?

Not every site has a code for every behavior. An empty cell means the classification does not provide a code in that column for that site, and the parent row or the main Index should be consulted.

Related References

Table of Neoplasms Hub Table of Neoplasms Lookup Primary Malignant Codes Benign Neoplasm Codes Uncertain Behavior Codes Table of Drugs and Chemicals ICD-10-CM Codes List ICD-10-CM Code Lookup

Source: official CMS FY 2026 ICD-10-CM release, effective October 1, 2025 through September 30, 2026.