Gregory M. Bolduc, MD
Gastroenterology Physician · South Weymouth, MA
Gregory M. Bolduc, MD is a gastroenterology physician with a practice address in South Weymouth, Massachusetts, and NPI 1821078767, issued on Jan 18, 2006. Check the license (Massachusetts 78133, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Gregory M. Bolduc
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 78133 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1085 Main St, South Weymouth, MA 02190
- Phone
- (781) 331-2922
- Enumerated
- Jan 18, 2006
- Record last updated
- Jul 14, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicaid ID
- 3125840 MA
- Medicare enrollment
- Enrolled (PECOS I20110209000686); accepts Medicare assignment
- Medical or professional school
- State University Of Ny Upstate Medical University, 1991
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 686 in Massachusetts → Look up another NPI →
Also registered at 1085 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mona AkbariGastroenterology Physician1871720037
- Clayland Cox, MDGastroenterology Physician1043290752
- Fernando Martinez, M.D.Gastroenterology Physician1255598165
- James Moore, MDGastroenterology Physician1154301422
- Jonathan Nass, M.D.Gastroenterology Physician1558587998
- Bradford Sampson, M.D.Gastroenterology Physician1962410548
Verify Gregory M. Bolduc in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 78133Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% more Medicare Part D claims than the average gastroenterology physician in 2024
1,504 Medicare Part D claims for 301 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
Most prescribed
- Omeprazole281 claims
- Pantoprazole Sodium229 claims
- Dicyclomine Hcl163 claims
- Linzess103 claims
- Famotidine59 claims
- Mesalamine58 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.
The MIPS final score for 2023 (Medicare payment program): 54.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- South Shore Medical Center, Inc.Norwell, MA
- South Suburban Gastroenterology PCWeymouth, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory M. Bolduc among 686 gastroenterology physician records in Massachusetts
Gregory M. Bolduc, MD is one of 686 gastroenterology physician records with a practice address in Massachusetts. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 49% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1991 · median 2004 among the 491 with a school on file
- Record last updated2010 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 gastroenterology physician records list a practice address in South Weymouth
They are 8 of the 445 NPPES records with a practice address in South Weymouth, and 686 gastroenterology physician records in Massachusetts.
All 686 in Massachusetts → Every provider in South Weymouth → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Mona AkbariSouth Weymouth, MA 021901871720037
- Clayland Cox, MDSouth Weymouth, MA 021901043290752
- Fernando Martinez, M.D.South Weymouth, MA 021901255598165
- James Moore, MDSouth Weymouth, MA 021901154301422
- Jonathan Nass, M.D.South Weymouth, MA 021901558587998
- Bradford Sampson, M.D.South Weymouth, MA 021901962410548
- John Vermeulen, MDSouth Weymouth, MA 021901215917596
- Daniel Mishkin, M.D.Weymouth, MA 021891801822564
Common questions
What is Gregory M. Bolduc, MD's NPI number?
Gregory M. Bolduc, MD's National Provider Identifier (NPI) is 1821078767, issued on Jan 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory M. Bolduc, MD located?
The NPPES record lists a practice address at 1085 Main St, South Weymouth, MA, 02190. Phone: (781) 331-2922. Providers update this record themselves, so call before visiting.
How can I verify Gregory M. Bolduc, MD's license?
NPPES lists Massachusetts license number 78133, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory M. Bolduc, MD prescribe under Medicare Part D?
In 2024, Gregory M. Bolduc, MD had 1,504 Medicare Part D claims for 301 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Gregory M. Bolduc, MD's MIPS final score?
The 2023 MIPS final score is 54.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.