Michael Callahan
NPI 1356979538 · Physician Assistant · Fredericksburg, VA
Michael Callahan is a Physician Assistant provider in Fredericksburg, VA (NPI 1356979538).
Provider details
- NPI number
- 1356979538
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Mailing address
Registry dates
- Enumerated
- 2020-04-01
- Last updated
- 2020-04-05
- Certified
- 2020-04-05
Frequently asked questions
- What is Michael Callahan's NPI number?
- Michael Callahan's National Provider Identifier (NPI) is 1356979538, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Callahan's specialty?
- Michael Callahan is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Michael Callahan located?
- Michael Callahan's practice location on file with NPPES is 4600 Spotsylvania Pkwy, Fredericksburg, VA 22408-7762.
- What is Michael Callahan's phone number?
- The practice phone number listed in the NPPES registry for Michael Callahan is (540) 498-4000.
- Is Michael Callahan's NPI active?
- Yes — Michael Callahan's NPI (1356979538) is active in the NPPES registry as of the last update on 2020-04-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.