Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Ronald Gaertner, M.D

Psychiatry Physician in Fredericksburg, VA · enumerated 2005 · practices at Fredericksburg Obgyn Center Inc.

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

National Provider Identifier

1649267188

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Registry record

Entity type Individual (Type 1)

Name William Ronald Gaertner

Credential M.D

Sex Male

Practice address 621 Jefferson Davis Hwy, Suite 201, Fredericksburg, VA, 22401

Phone (540) 372-2028

Fax (540) 372-6541

Enumeration date Sep 30, 2005

Last updated in NPPES May 25, 2022

Taxonomy & licenses

2084A0401X Addiction Medicine (Psychiatry & Neurology) Physician Allopathic & Osteopathic Physicians · License 0101035045 (VA) Secondary

2084P0805X Geriatric Psychiatry Physician Allopathic & Osteopathic Physicians · License 0101035045 (VA) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 0101035045 (VA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
458104000	Other	-	MAGELLAN
51337	Other	-	CIGNA
861112647	Other	-	UBH
071985427	Medicaid	VA	-
146004	Other	-	ANTHEM
081522	Other	-	OPTIMA
307350	Other	-	ANTHEM
347	Other	-	VALUE OPTIONS
4076171	Other	-	AETNA

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

What specialty is William Gaertner?

William Gaertner is registered in NPPES with the primary taxonomy of Psychiatry Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Syed Ahmed Psychiatry Physician · Fredericksburg, VA NPI 1093765554 C. Royster Obstetrics & Gynecology Physician · Fredericksburg, VA NPI 1720198633 Fredericksburg Obgyn Center Inc Obstetrics & Gynecology Physician · Fredericksburg, VA NPI 1134282197 Melville Wright Specialist · Fredericksburg, VA NPI 1609868009

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-05-25.