CODING PRIMARY SITE, Schemes and Mind Maps of Topography

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CODING^ PRIMARY^

SITE

Nadya Dimitrova

OUTLINE
^ What is coding and why do we need it?
^ ICD-10 and ICD-O
^ ICD-O-3 Topography coding rules
^ ICD-O-3 online

WHAT IS CODING AND WHY DO WE NEED IT

^ Coding is based on^ classification:^
^ arrangement of neoplasms or distribution in classesaccording to a method or system, ensuring^ comparability.
^ The two most important items of information are:^
^ Topography:^ the location (site) of the tumour in thebody;^
^ Morphology^ (histology, cytology): the appearance ofthe tumour when examined under the microscope.

WHAT IS^ ICD-O?^
^ Subset of^ International Classification of Diseases^
^ Specific code set for neoplasms^
^ Coding system for primary site and cell type^
^ Example: adenocarcinoma of lung = C34, 8140/3^ Original—all diseases

Subset—neoplasms only

Term^ ICD-

ICD-O-

Lung tumor, benign^

D14.3^ C34.9 8000/

Lung tumor, borderline

D38.1^ C34.9 8000/

Lung tumor, in situ^

D02.2^ C34.9 8000/

Lung tumor, invasive

C34.9^ C34.9 8000/

Lung tumor, metastatic

C78.0^ C34.9 8000/

Lung tumor, uncertainif primary or metastatic

D38.1^ C34.9 8000/

ICD-10^ AND^ ICD-O-

DIFFERENCES: 2. S

PECIAL^ CODES

^ Some special codes added in ICD-O
^ Some ICD-10 codes not used
^ Some codes used differently

ICD-10 CODES^ NOT^

USED IN^ ICD-O

HISTOLOGY-SPECIFIC

ICD-10 CODES
^ ICD-10 Codes (not “anatomic sites” in ICD-O)

Use instead C43^ Melanoma of skin

C

C45^ Mesothelioma

C38.

C46^ Kaposi’s sarcoma

C

C81-C96^ Lymphomas, leukemias,

C42.

other blood diseases^

C77._

OTHER^ ICD-10 CODES

NOT^ USED IN^ ICD-O

^ Anatomic SitesICD-10^ C26.1^ Spleen^

Use C42. C78-C79^ Secondary malignant neoplasmof other specified sites^ Code primary site (only) in ICD-O C97^ Malignant neoplasm of indepen-dent multiple primary sites^ Code each primary separately

C___ ___ ___. ___^ ___ ___ ___ ___ / ___ ___ Topography^

Morphology Digits Topography – 4Cell type – 4Behavior – 1Grade – 1

STRUCTURE OF^ ICD-O C

ODE

___ ___ ___. ___^ ___ ___ ___ ___ / ___ ___^34 2 C^ Primary^ Cell type^ Subsite

0 7 80 3 2 Behavior Differentiation ___ ___ ___. ___^ ___ ___ ___ ___ / ___ ___^34 2 C Lung^ Squamous cell Middle lobecarcinoma

0 7 80 3 2 Invasive Moderately differentiated

MEANING

ICD-O^ TOPOGRAPHY CODES

-^ EXAMPLE^ C50.8UOQ^ UIQ^ C50.2C50.4^12111210 C50.0C50.8 C50.8 93 C50.1 (^847 56) LOQ^ LIQC50.5^ C50.3C50.8 RIGHT BREAST

ICD-O^ TOPOGRAPHY CODES

-^ EXAMPLE

ICD-O-3 TOPOGRAPHY

CODING^ RULES

^ Rule A.^ Topographic regions and ill-definedsites
^ Rule B.^ Prefixes
^ Rule C.^ Tumors involving more than onetopographic category or subcategory
^ Rule D.^ Topography codes for lymphomas
^ Rule E.^ Topography code for leukemias

RULE^ A.^ TOPOGRAPHIC

REGIONS AND

ILL-DEFINED^ SITES
^ If the diagnosis does not specify the tissue of origin, usethe^ appropriate tissues

suggested in the alphabetic index for each ill-defined site in preference to the "NOS"category.
Ill-defined site:^ term for area of the body used in ageneral sense^
^ Examples: arm, ankle, face
NOS:^ Not otherwise specified^
^ Not elsewhere classified^
^ Term used in a general sense^
^ When there are more specific codes^
^ To encompass an organ as a whole