Gregory Williams
Family Medicine Physician · Merrimack, NH
Gregory Williams is a family medicine physician with a practice address in Merrimack, New Hampshire, and NPI 1427045632, issued on Oct 3, 2005. Check the license (New Hampshire 11119, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Gregory Williams
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 11119 NH
154397 MA
Self-reported in NPPES; status is on the state search - Practice location
- 382 DW Hwy, Merrimack, NH 03054
- Phone
- (603) 424-4181
- Enumerated
- Oct 3, 2005
- Record last updated
- Aug 23, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicaid ID
- 110061100/A MA
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 816 in New Hampshire → Look up another NPI →
Verify Gregory Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 11119Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average family medicine physician in 2024
100 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Metformin Hcl11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Gregory Williams among 816 family medicine physician records in New Hampshire
Gregory Williams is one of 816 family medicine physician records with a practice address in New Hampshire. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 87% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2012 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 family medicine physician records list a practice address in Merrimack
They are 16 of the 270 NPPES records with a practice address in Merrimack, and 816 family medicine physician records in New Hampshire.
All 816 in New Hampshire → Every provider in Merrimack → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Thomas Astolfi, M.DMerrimack, NH 030541689650665
- William Blackwood, M.D.Merrimack, NH 030541346226107
- Archie Dickinson, MDMerrimack, NH 030541518143650
- Holly Drexler, M.D.Merrimack, NH 030541790761542
- Debra Garlin, DOMerrimack, NH 030541679537690
- Edward Hall, M.D.Merrimack, NH 030541083622674
- Ewa Jankowska, MDMerrimack, NH 030541659682961
- Nicola Kernan, M.D.Merrimack, NH 030541093791832
Common questions
What is Gregory Williams's NPI number?
Gregory Williams's National Provider Identifier (NPI) is 1427045632, issued on Oct 3, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Williams located?
The NPPES record lists a practice address at 382 DW Hwy, Merrimack, NH, 03054. Phone: (603) 424-4181. Providers update this record themselves, so call before visiting.
How can I verify Gregory Williams's license?
NPPES lists New Hampshire license number 11119, as entered by the provider. Search the New Hampshire Board of Medicine at https://www.oplc.nh.gov/board-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Williams prescribe under Medicare Part D?
In 2024, Gregory Williams had 100 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions 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.