Credential or role

OB medical abbreviation

OB means "obstetrics".

Each meaning matched at least two public references (2 in all for OB), checked October 23, 2026. The table lists them.

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What OB means

Example

Sample referral: "OB visit."

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

Related abbreviations

  • GYNgynecology
  • OBGYNobstetrics and gynecology
  • L&Dlabor and delivery
  • LMPlast menstrual period
  • EDCestimated date of confinement
  • CNAcertified nursing assistant

Elsewhere on Rivvi

Questions

What does OB mean in medical terms?

OB means "obstetrics".

Where is OB used?

OB shows up in charting and staffing. Its category here is credential or role.

Is OB on the Joint Commission Do Not Use list?

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

Source: NLM SPECIALIST Lexicon abbreviations file (LRABR); Army Regulation 40-66, Appendix B: Authorized Medical Records Abbreviations. 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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