What is Gwen Callahan's NPI number?

Gwen Callahan's National Provider Identifier (NPI) is 1487836961, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Gwen Callahan's specialty?

Gwen Callahan is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).

Where is Gwen Callahan located?

Gwen Callahan's practice location on file with NPPES is 500 Hospital Dr, Warrenton, VA 20186-3027.

What is Gwen Callahan's phone number?

The practice phone number listed in the NPPES registry for Gwen Callahan is (540) 316-5000.

Is Gwen Callahan's NPI active?

Yes — Gwen Callahan's NPI (1487836961) is active in the NPPES registry as of the last update on 2023-01-09.

IndividualActive

Gwen Callahan, PA C

NPI 1487836961 · Physician Assistant · Warrenton, VA

Gwen Callahan, PA C is a Physician Assistant provider in Warrenton, VA (NPI 1487836961).

Provider details

NPI number: 1487836961
Entity type: Individual
Primary specialty: Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Credential: PA C
Sex: Female
Sole proprietor: Yes
License: 0110006327 (VA)

Specialties & taxonomies

Physician AssistantPrimary363A00000XLicense 0110006327 (VA)
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistant363A00000XLicense C07550 (MD)
Physician Assistants & Advanced Practice Nursing Providers
Medical Physician Assistant363AM0700XLicense 5601005001 (MI)
Physician Assistants & Advanced Practice Nursing Providers

Profile Score

Detailed profile(97/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
18 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
3 documented practice locations

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

500 Hospital Dr

Warrenton, VA 20186-3027

Phone: (540) 316-5000

Approximate (ZIP-level) locationGet directions

More VA providers

Mailing address

50505 Schoenherr Rd

Shelby Twp, MI 48315-3140

Additional practice locations (2)

11116 Medical Campus Rd
Hagerstown, MD 21742-6710
Phone: (301) 790-8804
50505 Schoenherr Rd
Suite 290
Shelby Twp, MI 48315-3140
Phone: (586) 314-0054
Fax: (586) 731-6275

Enumerated: 2007-11-27
Last updated: 2023-01-09
Certified: 2023-01-09

Frequently asked questions

What is Gwen Callahan's NPI number?: Gwen Callahan's National Provider Identifier (NPI) is 1487836961, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Gwen Callahan's specialty?: Gwen Callahan is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
Where is Gwen Callahan located?: Gwen Callahan's practice location on file with NPPES is 500 Hospital Dr, Warrenton, VA 20186-3027.
What is Gwen Callahan's phone number?: The practice phone number listed in the NPPES registry for Gwen Callahan is (540) 316-5000.
Is Gwen Callahan's NPI active?: Yes — Gwen Callahan's NPI (1487836961) is active in the NPPES registry as of the last update on 2023-01-09.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.