Appendix: B: Comparison of ICD-O-3, ICD-10-CM, ICD-10 and ICD-9-CM

The tables below show the codes for each of the following coding systems: ICD-O-3 (used by cancer registrars), ICD-10-CM, ICD-10 and ICD-9-CM. These are to be used as a reference only.

For a more detailed list, see the Conversion Files at https://seer.cancer.gov/tools/conversion/

Lip, Oral Cavity and Pharynx (C00-C14)
ICD-O-3 Code ICD-O-3 Description ICD-10-CM ICD-10 ICD-9-CM
C00_ Lip C00.- C00.- 140.-
C019 Base of Tongue C01 C01 141.0
C02_ Other and Unspecified parts of tongue C02.- C02.- 141.-
C03_ Gum C03.- C03.- 143.-
C04_ Floor of Mouth C04.- C04.- 144.-
C05_ Palate C05.- C05.- 145.2-145.5
C06_ Other and unspecified parts of mouth C06.0, C06.1, C06.2, C06.8-, C06.9 C06.0, C06.1, C06.2, C06.9 145.0, 145.1, 145.6, 145.9
C079 Parotid Gland C07 C07 142.0
C08_ Other and unspecified major salivary glands C08.- C08.- 141.1, 142.8, 142.9
C09_ Tonsil C09.- C09.- 146.0-146.2
C10_ Oropharynx C10.- C10.- 146.3-146.9
C11_ Nasopharynx C11.- C11.- 147.-
C129 Pyriform sinus C12 C12 148.1
C13_ Hypopharynx C13.- C13.- 148.0, 148.2, 148.3, 148.8, 148.9
C14_ Other and ill-defined sites in lip, oral cavity and pharynx C14.- C14.- 149.-


Digestive Organs (C15-C26)
ICD-O-3 Code ICD-O-3 Description ICD-10-CM ICD-10 ICD-9-CM
C15_ Esophagus C15.- C15.- 150.-
C16_ Stomach C16.- C16.- 151.-
C17_ Small intestine C17.- C17.- 152.-
C18_ Colon C18.- C18.- 153.-
C199 Rectosigmoid junction C19 C19 154.0
C209 Rectum C20 C20 154.1
C21_ Anus and anal canal C21.- C21.- 154.-
C220 Liver C22.- C22.- 155.0
C221 Intrahepatic bile duct C22.1 C22.1 155.1
C239 Gallbladder C23 C23 156.0
C24_ Other and unspecified parts of the Biliary tract C24.- C24.- 156.-
C25_ Pancreas C25.- C25.- 157.-
C26_ Other ill-defined digestive organs C26.- C26.- 159.-


Respiratory System and Intrathoracic Organs (C30-C39)
ICD-O-3 Code ICD-O-3 Description ICD-10-CM ICD-10 ICD-9-CM
C30_ Nasal Cavity and Middle Ear C30. C30.- 160.-
C31_ Accessory Sinuses C31. C31.- 160.-
C32_ Larynx C32. C32.- 161.0
C339 Trachea C33 C33 162
C34_ Lung C34. C34.- 162.-
C379 Thymus C37 C37 164.0
C38_ Heart, Mediastinum C38.- C38.- 164.-
C39_ Other and ill-defined sites within respiratory system and intrathoracic organs C39.- C39.- 165.-


Coding for Bones, Joints and Articular Cartilage (C40-C41)
ICD-O-3 Code ICD-O-3 Description ICD-10-CM ICD-10 ICD-9-CM
C40_ Bones, joints, and articular cartilage of the limb C40.- C40.- 170.-
C41_ Bones, joints and articular cartilage of other/ unspecified sites C41.- C41.- 171.-


Skin (Melanoma, Merkel Cell, and Other Skin Histologies) (C43, C44, C4a)
ICD-O-3 Code ICD-O-3 Description ICD-10-CM ICD-10 ICD-9-CM
C44_ Melanoma skin C43.- C43._ 172.-
C44_ Other skin histologies C44.- C44._ 173.-
C44_ Other skin histologies C4a.- C44._ 209.3-


Kaposi Sarcoma (9140)
ICD-O-3 Code ICD-O-3 Description ICD-10-CM ICD-10 ICD-9-CM
C44_ KS of skin C46.0 C46.1 176.1
C49_ KS of soft tissue C46.1 C46.1 176.1
C05_ KS of palate C46.2 C46.2 176.2
C77_ KS of lymph nodes C46.3 C46.3 176.5
  KS of GI sites C46.4 C46.7 176.4
C34_ KS of Lung C46.5 C46.7 176.8
  KS of multiple organs C46.9 C46.8 176.8
C449 KS of unspecified site C46.9 C46.9 176.9


Peripheral Nerves, Retroperitoneum, Peritoneum, and Soft Tissues (C47, C48, C49)
ICD-O-3 Code ICD-O-3 Description ICD-10-CM ICD-10 ICD-9-CM
C47_ Peripheral nerves and autonomous nervous system C47.- C47.- 171.-
C48_ Retroperitoneum and Peritoneum C48.- C48.- 158.-
C49_ Connective, subcutaneous and other soft tissues C49.- C49.- 171.-


Breast and Female Genital Organs (C50 – C58)
ICD-O-3 Code ICD-O-3 Description ICD-10-CM ICD-10 ICD-9-CM
C50_ Breast C50.- C50.- 174.-
C51_ Vulva C51.- C51.- 184.-
C529 Vagina C52 C52 184.0
C53_ Cervix Uteri C53.- C53.- 180.-
C54_ Corpus Uteri C54.- C54.- 182.-
C559 Uterus, NOS C55 C55 179
C569 Ovary C56.- C56 183.0
C57_ Other & unspecified female genital organs C57.- C57 183.-
C589 Placenta C58 C58 181


Male Genital Organs (C60-C63)
ICD-O-3 Code ICD-O-3 Description ICD-10-CM ICD-10 ICD-9-CM
C60_ Penis C60.- C60.- 187.1-187.4
C619 Prostate C61 C61 185
C62_ Testis C62.- C62.- 186._
C63 Other unspecified male genital organs C63.- C63.- 187.5-187.9


Urinary Tract (C64-C68)
ICD-O-3 Code ICD-O-3 Description ICD-10-CM ICD-10 ICD-9-CM
C649 Kidney C64_ C64 189.0
C659 Renal pelvis C65_ C65 189.1
C669 Ureter C66_ C66 189.2
C67_ Bladder C67_ C67_ 188._
C68_ Other and unspecified urinary organs C68_ C68_ 189.3, 189.4, 189.8, 189.9


Eye, Brain and Other Parts of the Central Nervous System (C69-C72)
ICD-O-3 Code ICD-O-3 Description ICD-10-CM ICD-10 ICD-9-CM
C69_ Eye and Adnexa C69.- C69.- 190.-
C70_ Meninges C70.- C70.- 192.-
C71_ Brain C71.- C71.- 191.-
C72_ Spinal cord, cranial nerves, and other parts of the central nervous system C72.- C72.- 192.-


Thyroid, Other Endocrine Glands, and Ill-defined Sites (C73-C76)
ICD-O-3 Code ICD-O-3 Description ICD-10-CM ICD-10 ICD-9-CM
C739 Thyroid gland C73 C73 193
C74_ Adrenal gland C74.- C74.- 194.0
C75_ Other endocrine glands & related structures C75.- C75.- 194.-
C76_ Other and ill-defined sites C76.- C76.- 195.-


Lymph Nodes, Secondary Cancers & Unknown Primary Site (C77-80)
Description ICD-10-CM ICD-10 ICD-9-CM
Secondary and unspecified malignant neoplasm of lymph nodes C77.- C77.- 196.-
Secondary malignant neoplasm of respiratory and digestive organs C78.0- C78.- 197.-
Secondary malignant neoplasm of other and unspecified site C79.- C79.- 198.-
Malignant neoplasm without specification of site C80.- C80 199.-
Note: Lymph node involvement secondary to a primary cancer is recorded in staging for cancer registrars.

Reportable Benign (/0 or /1) Neoplasms
ICD-O-3 Code ICD-O-3 Description ICD-10-CM ICD-10 ICD-9-CM
C70. _ Meninges D32.0 D32.0 225.2, 225.4
C710. _ Cerebrum D33.0 D33.0 225.0
C72. _ Spinal Cord, Cranial Nerves, & Other Parts of Central Nervous System D33.4 D33.4 225.1, 225.3, 225.8
C751 Pituitary gland D35.2 D35.2 227.3
C752 Craniopharyngeal duct D35.3 D35.3 227.3
C753 Pineal gland D35.4 D35.4 227.4

Updated: December 3, 2018