Billing and insurance

EIN medical abbreviation

EIN means "employer identification number".

Each meaning matched at least two public references (3 in all for EIN), checked October 23, 2026. The table lists them.

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What EIN means

Example

Sample form field: "EIN."

A made-up line that shows the abbreviation in place. It is not about any patient and is not an instruction.

Related abbreviations

  • TINtaxpayer identification number
  • IRSInternal Revenue Service
  • NPINational Provider Identifier
  • SSNSocial Security number
  • ACAAffordable Care Act
  • ACOaccountable care organization

Elsewhere on Rivvi

Questions

What does EIN mean in medical terms?

EIN means "employer identification number".

Where is EIN used?

EIN shows up in billing and claims. Its category here is billing and insurance.

Is EIN on the Joint Commission Do Not Use list?

No. EIN is not on the Joint Commission Do Not Use list or the ISMP error-prone list as checked on October 23, 2026.

Source: NCI Thesaurus, including CDISC SDTM terminology (NCI EVS); CMS Acronyms; Federal agency program pages (CMS, Medicare.gov, SSA, IRS, OIG, HHS, DOL, HRSA, FDA, CDC) and healthcare.gov glossary. Data as of October 23, 2026. Last updated October 23, 2026. How we source data. Spotted an error? Send a correction.

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