Michael Grillon, MD
NPI 1639178122 · Family Medicine Physician · Onancock, VA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Grillon, MD is a Family Medicine Physician provider in Onancock, VA (NPI 1639178122).
Provider details
- NPI number
- 1639178122
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 0101055534 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 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
Mailing address
Additional practice locations (1)
- 8262 Atlee RdSuite 205Mechanicsville, VA 23116-1816Phone: (804) 559-0194Fax: (804) 559-0198
Registry dates
- Enumerated
- 2005-07-18
- Last updated
- 2019-11-11
Frequently asked questions
- What is Michael Grillon's NPI number?
- Michael Grillon's National Provider Identifier (NPI) is 1639178122, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Grillon's specialty?
- Michael Grillon is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Grillon located?
- Michael Grillon's practice location on file with NPPES is 20486 Market Street, Onancock, VA 23417.
- What is Michael Grillon's phone number?
- The practice phone number listed in the NPPES registry for Michael Grillon is (757) 302-2700.
- Does Michael Grillon accept Medicare?
- Michael Grillon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Grillon's NPI active?
- Yes — Michael Grillon's NPI (1639178122) is active in the NPPES registry as of the last update on 2019-11-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.