William Grant Parker, PA-C
Physician Assistant · Boston, MA
William Grant Parker, PA-C is a physician assistant with a practice address in Boston, Massachusetts, and NPI 1932989696, issued on Oct 2, 2023. Check the license (Massachusetts PA101771, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Grant Parker
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA101771 MA
Self-reported in NPPES; status is on the state search - Practice location
- 179 Longwood Ave, Boston, MA 02115
- Phone
- (617) 732-2850
- Enumerated
- Oct 2, 2023
- Record last updated
- Nov 21, 2025
- Medicare enrollment
- Enrolled (PECOS I20251119001480); accepts Medicare assignment
- Entity
- Type 1 · individual
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Verify William Grant Parker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license PA101771Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Berkshire Faculty Services IncLenox, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Grant Parker among 4,713 physician assistant records in Massachusetts
William Grant Parker, PA-C is one of 4,713 physician assistant records with a practice address in Massachusetts. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 75% of them.
- NPI issued2023 · 75% of these records are older, 17% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2025 · median 2019 among the 3,217 with a school on file
- Record last updated2025 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,660 physician assistant records list a practice address in Boston
They are 1,660 of the 41,865 NPPES records with a practice address in Boston, and 4,713 physician assistant records in Massachusetts.
All 4,713 in Massachusetts → Every provider in Boston → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Lara BenoBoston, MA 021151013982677
- Laura BondlowBoston, MA 021151003806571
- Kristin Boyt, PABoston, MA 021151225091358
- Jessica Britnell, MS, PA-CBoston, MA 021151255309183
- Kendra Church, MS PA CBoston, MA 021151043261381
- Michele Elms, PABoston, MA 021151821052671
- Andrea Gayle-Bennett, PABoston, MA 021151497728026
- Sherri Horonjeff, PABoston, MA 021151669444394
Common questions
What is William Grant Parker, PA-C's NPI number?
William Grant Parker, PA-C's National Provider Identifier (NPI) is 1932989696, issued on Oct 2, 2023. An NPI identifies a provider in billing; it is not a license.
Where is William Grant Parker, PA-C located?
The NPPES record lists a practice address at 179 Longwood Ave, Boston, MA, 02115. Phone: (617) 732-2850. Providers update this record themselves, so call before visiting.
How can I verify William Grant Parker, PA-C's license?
NPPES lists Massachusetts license number PA101771, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.