H2 Receptor Antagonist

H2RA

clinical

Updated 5/16/2026

Definition

A class of medications that reduce gastric acid production by blocking histamine H2 receptors, abbreviated H2RA in pharmacy and PBM systems. Used in drug classification databases, formulary management, claims adjudication, and clinical decision support within EHR and pharmacy benefit platforms.

Standard Abbreviation

H2RA

Database Usage

-- Example column naming
CREATE TABLE claims (
  clm_id VARCHAR(50),
  h2ra VARCHAR(100),  -- H2 Receptor Antagonist (max 100 chars)
  ...
);

-- Example in SELECT
SELECT
  clm_id,
  h2ra as h2_receptor_antagonist
FROM claims;

Common uses in healthcare data

Risk stratification and population health analytics
CMS-HCC risk adjustment and RAF score calculation
Quality measure attribution and HEDIS reporting
Clinical data warehouse schema design
Value-based care contract performance tracking

Example database column name

ISO-11179 snake_case standard

-- Recommended column name
h2ra

-- Example DDL
CREATE TABLE healthcare_data (
  record_id   VARCHAR(50)   NOT NULL,
  h2ra         VARCHAR(100),  -- H2 Receptor Antagonist (max 100 chars)
  created_dt  TIMESTAMP     NOT NULL DEFAULT NOW()
);

Column names follow the ISO-11179 naming convention: lowercase, underscore-separated, using the standard abbreviation as a prefix where applicable.

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