Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Rachael A Mergenmeier, D.O.

Family Medicine Physician in Saint Peters, MO · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1518957265

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Registry record

Entity type Individual (Type 1)

Name Dr. Rachael A Mergenmeier

Credential D.O.

Sex Female

Practice address 107 Piper Hill Dr, Saint Peters, MO, 63376

Phone (636) 939-3648

Enumeration date Oct 25, 2005

Last updated in NPPES Aug 11, 2025

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 34007396 (OH) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 2008011538 (MO) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
080174665	Other	OH	MEDICARE RAILROAD
2206786	Medicaid	OH	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is NPI 1518957265 active?

Yes, as of the latest NPPES snapshot, NPI 1518957265 is active (record last updated 2025-08-11).

How do I verify Rachael Mergenmeier's NPI record?

Cross-check NPI 1518957265 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Robert Bradshaw Pediatrics Physician · Saint Peters, MO NPI 1558335638 Edward Kunst Internal Medicine Physician · Saint Peters, MO NPI 1467428672 Krista Woelfel Family Nurse Practitioner · St Peters, MO NPI 1881632990 Mary Ernst Nurse Practitioner · Saint Peters, MO NPI 1487694659 Stephanie Orlando Adult Health Nurse Practitioner · Saint Peters, MO NPI 1316976392 Ramesh Khurana Family Medicine Physician · Saint Peters, MO NPI 1922038736 Behrad Majidi Internal Medicine Physician · Saint Peters, MO NPI 1295765386 Jamie Malone Physical Therapist · Saint Peters, MO NPI 1609082692

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-11.