The medical coding universe
Find your way through diagnoses, procedures, supplies, and payment classifications. Pick any category to see how its codes are built and how they connect.
Click any row to see how its codes branch out.
Procedure / service
CPT
Procedures & services · Professional services, procedures, and specialized reporting.
View all CPT categoriesCategory I
Additional code sets
HCPCS Level II
Supplies & additional services · Products, equipment, drugs, and additional services.
View all HCPCS Level II categoriesCode families
Diagnosis / medical necessity
ICD-10-CM
Diagnoses & conditions · The conditions and circumstances associated with care.
View all ICD-10-CM categoriesDiagnosis chapters
Inpatient procedure
ICD-10-PCS
Inpatient procedures · Procedure sections for inpatient hospital coding.
View all ICD-10-PCS categoriesProcedure sections
Inpatient payment grouping
MS-DRG
Inpatient payment groups · Groups acute inpatient stays for hospital payment.
View all MS-DRG categoriesRanges by major diagnostic category
Outpatient facility payment grouping
APC
Outpatient facility payment groups · Groups hospital outpatient and ASC services for payment.
View all APC categoriesOutpatient groupings
Claim attributes
Modifiers & claim fields
Claim-level attributes · Details attached to a claim line. They are not procedures or diagnoses.
View all Modifiers & claim fields categories