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2026 CBCS EXAM PREP

2026 HIPAA TRANSACTION AND CODE SETS & 5 CORE MEDICAL CODE SETS

TermDefinition
HIPAA TRANSACTION CODES (*high yield) Standard electronic messages used to send healthcare and insurance information between covered entities.
X12 270* DETERMINE ELIGIBILITY BENEFIT INQUIRY (requests eligibility/ benefits information) KEYWORD: ELIGIBILITY
X12 271* ELIGIBILITY BENEFIT RESPONSE (provides eligibility and benefits information) KEYWORD: ELIGIBILITY
X12 276* CLAIM STATUS INQUIRY (requests claim status) KEYWORD: CLAIM STATUS
X12 277* CLAIM STATUS RESPONSE (provides claim status) KEYWORD: CLAIM STATUS
X12 278* REFERRAL CERTIFICATION AND AUTHORIZATION (requests prior authorization and referrals) KEYWORD: AUTHORIZATION
X12 820 HEALTH PLAN PREMIUM PAYMENT (transmits premium payments) KEYWORD: PREMIUM PAYMENT
X12 834 BENEFIT ENROLLMENT/MAINTENANCE (enrolls, updates, or disenrolls members) KEYWORD: ENROLLMENT
X12 835* SEND PAYMENT/REMITTANCE ADVICE (explains claim payments, denials, and adjustments) KEYWORD: PAYMENT
X12 837* HEALTH CARE CLAIMS (submits healthcare claims from providers to payers for reimbursement) KEY WORD: CLAIM
X12 839 (low yield) CLAIM ADJUSTMENT
X12 1001 (low yield) OLDER CODE - MODERN 834 ENROLLMENT/DISENROLLMENT;
X12 1002 (low yield) OLDER CODE - MODERN 820 PREMIUM PAYMENT;
COORDINATION OF BENEFITS (COB) Used to determine payment responsibility when a patient has multiple insurance plans
HEALTH CARE CLAIMS ATTACHMENT Used to transmit supporting documentation for a claim, such as medical records/reports
FIRST REPORT OF INJURY Used to report a work-related injury or illness, typically for workers' compensation
HIPAA FIVE CORE MEDICAL CODE SETS Standardized code sets to identify diagnoses, procedures, and other data elements
CDT CODE ON DENTAL PROCEDURES AND NOMENCLATURE (dental procedures/services)
CPT CURRENT PROCEDURAL TERMINOLOGY (outpatient procedures/services)
HCPCS Level II HEALTH CARE COMMON PROCEDURE CODING SYSTEM (medications, procedures, services, and supplies)
ICD-10-CM INTERNATIONAL CLASSIFICATION OF DISEASES, 10th EDITION, CLINICAL MODIFICATION (diagnoses, diseases, injuries, conditions)
ICD-10-PCS INTERNATIONAL CLASSIFICATION OF DISEASES, 10th REVISION, PROCEDURE CODING SYSTEM (inpatient hospital procedures)
Created by: C to the C
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