history npi number

hx_npi

provider

Updated 3/30/2026

Definition

The national provider identifier for a past medical events. Used as a unique reference to identify and track the history across healthcare systems. This field is commonly used in electronic health records (EHR), healthcare information systems (HIS), and clinical data warehouses for history management and reporting.

Standard Abbreviation

hx_npi

Database Usage

-- Example column naming
CREATE TABLE claims (
  clm_id VARCHAR(50),
  hx_npi VARCHAR(10),  -- history npi number (max 10 chars)
  ...
);

-- Example in SELECT
SELECT
  clm_id,
  hx_npi as history_npi_number
FROM claims;

Common uses in healthcare data

Provider data management and credentialing workflows
Network adequacy analysis and directory accuracy
NPI validation and NPPES registry reconciliation
Provider master data management (MDM)
Payer-provider contract and fee schedule management

Example database column name

ISO-11179 snake_case standard

-- Recommended column name
hx_npi

-- Example DDL
CREATE TABLE healthcare_data (
  record_id   VARCHAR(50)   NOT NULL,
  hx_npi       VARCHAR(10),  -- history npi number (max 10 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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