Dr. Gregory M. Bolduc, MD

  • South Weymouth, MA
  • Gastroenterologist
NPI1821078767PAC ID5890975759
Medicare services, 2024
939
Medicare patients, 2024
608
Part D claims, 2024
1,504
MIPS score, 2024
20
Hospital affiliations
2
Practice address
1085 Main Street, South Weymouth, MA 02190
Practice phone
Call (781) 331-2922
Professional email
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Personal email
Get personal email
Mobile number
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Social profiles

Primary practice

Weymouth Endoscopy

Surgery Center - Medicare-Certified · South Weymouth, Massachusetts

See all 9 affiliations

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Dr. Gregory M. Bolduc is a gastroenterologist in South Weymouth, Massachusetts

Dr. Bolduc practices at Weymouth Endoscopy in South Weymouth, Massachusetts.

Dr. Bolduc's NPI, 1821078767, was assigned on January 18, 2006. Dr. Bolduc graduated from SUNY Upstate Medical University in 1991. Dr. Bolduc holds Massachusetts license 78133.

NPI and contact details
Medicare PAC ID
5890975759
NPI enumeration date
January 18, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(781) 331-2922
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
61
Medical school graduation
1991

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Gregory M. Bolduc practices at Weymouth Endoscopy in South Weymouth, Massachusetts

Dr. Bolduc's primary practice is Weymouth Endoscopy, at 1085 Main Street, South Weymouth, MA 02190. The practice phone is (781) 331-2922.

  • Weymouth Endoscopy
    1085 Main Street, South Weymouth, MA 02190Phone(781) 331-2922

Source: Dmand AI Affiliation Data

Dr. Gregory M. Bolduc is affiliated with 6 sites of care and 3 medical groups

Dr. Bolduc's primary practice is Weymouth Endoscopy in South Weymouth, Massachusetts. Dr. Bolduc is also affiliated with South Shore Hospital. The medical group on file is South Shore Medical Center. Dmand AI also links Dr. Bolduc to 1 more hospital, 3 group practices and clinics and 2 medical groups, each named with a free account.

See all 9 affiliations for Dr. Bolduc

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Gregory M. Bolduc's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Bolduc practices, 6 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Weymouth EndoscopyAvailable with a free account
+5 more sites and 2 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Gregory M. Bolduc is one of 597 gastroenterologists in Massachusetts

Gastroenterology is Dr. Bolduc's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Bolduc is board certified in gastroenterology by the American Board of Internal Medicine. Dmand AI has Dr. Bolduc's licenses on file in 2 states: Massachusetts and Virginia.

Specialties and state licenses

  • Gastroenterology, MassachusettsPrimaryLicense 78133 · 1993 to 2026 · taxonomy 207RG0100X
  • Virginia license1997 to 2026

Clinical focus

Dmand AI lists acid reflux, chronic inflammatory bowel disease (IBD), cirrhosis of the liver, colonoscopy, gastroenteritis, gastrointestinal bleeding, irritable bowel syndrome (IBS) and pancreas or bile duct endoscopy (ERCP) among the conditions Dr. Bolduc treats.

Gastroenterologists near Dr. Bolduc

Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Gregory M. Bolduc billed Medicare for 939 services in 2024

CMS data shows 939 Medicare services from Dr. Bolduc across 12 procedure codes in 2024, for 608 Medicare patients. Medicare paid $102,703 for them.

Medicare services, 2024939
Medicare patients608
Paid by Medicare$102,703
Procedure codes12

Dr. Bolduc's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 3372024: 43429%
Surgery
2023: 4592024: 41410%
Other services
2023: 892024: 912%

Where Dr. Bolduc's Medicare services took place, 2024

  • In an office23024%
  • In a facility70976%

Dr. Bolduc compared with the Massachusetts median for gastroenterologists, 2024

  • Dr. Bolduc
  • Massachusetts median
Medicare services
939vs 51981% above
Medicare patients
608vs 34377% above
Part D claims
1,325vs 3004.4 times

Medians across 583 gastroenterologists in Massachusetts with Dmand AI profiles that report each measure.

Dr. Bolduc's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Bolduc

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Gregory M. Bolduc treated 608 Medicare patients in 2024, average age 74

CMS counts 608 Medicare patients who saw Dr. Bolduc in 2024. The largest group is 65 to 74, with 287 patients. 75% of them have high cholesterol, and 69% have high blood pressure. 15% are also on Medicaid. Their average risk score is 1.31, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Bolduc's median patient age at 61, with 53% women.

Medicare patients, 2024608
Average age74
Average risk score1.31
Also on Medicaid15%

Dr. Bolduc's Medicare patients by age, 2024

Dr. Bolduc's Medicare patients by sex, 2024

  • Women36159%
  • Men24741%

Chronic conditions among Dr. Bolduc's Medicare patients, 2024

  1. High cholesterol75%
  2. High blood pressure69%
  3. Arthritis47%
  4. Anxiety35%
  5. Mood disorders30%
  6. Chronic kidney disease26%
  7. Depression26%
  8. Ischemic heart disease26%

Share of Medicare patients with each condition. A patient can have several.

Dr. Bolduc's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 61

Patient panel by sex, all payers

  • Women53%
  • Men45%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Gregory M. Bolduc wrote 1,504 Medicare Part D claims in 2024

In 2024, Dr. Bolduc wrote 1,504 Medicare Part D claims for 301 patients. 86% of them were for generic drugs. CMS names the drug for 1,325 of them, across 26 drugs with 11 or more claims each, at $204,409 in total drug cost. In 2023, CMS named 1,247 claims across 27 drugs.

Part D claims, 20241,504
Drugs named by CMS26
Total drug cost$204,409
Part D patients301

Dr. Bolduc's Part D claims by kind of drug, 2024

  • Generic1,291 claims86%
  • Brand-name and other213 claims14%

Dr. Bolduc's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Dr. Bolduc's Part D claims, 2024

  • Antibiotics1%19 of 1,504 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 1,2472024: 1,3256%

Drugs named by CMS: 26 in 2024, 27 in 2023.

See all prescribing by Dr. Bolduc

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Gregory M. Bolduc scored 20 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 20 out of 100 for Dr. Bolduc for performance year 2024, reported individually. Dr. Bolduc accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Bolduc as offering telehealth. CMS counts 169 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Bolduc, more than 87% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Bolduc's MIPS scores, performance year 2024

  • 20of 100Final score
  • 0of 100Quality
  • 0of 100Promoting Interoperability
  • 0of 100Improvement Activities
  • 66of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Where Dr. Bolduc ranks in Medicare procedure volume

Upper gastrointestinal (GI) endoscopy for acid reflux
87th percentile169 procedures
Colonoscopy
87th percentile138 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)

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Dr. Gregory M. Bolduc received $615 in industry payments from 2016 to 2025

CMS Open Payments shows 16 general payments to Dr. Bolduc from 8 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Janssen Pharmaceuticals, Inc paid the most, $288.

General payments to Dr. Bolduc by program year, 2016 to 2025

General payments to Dr. Bolduc by kind, 2016 to 2025

$615in total
  • Food and beverage$60398%
  • Education$122%

Companies that paid Dr. Bolduc the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Bolduc

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Gregory M. Bolduc has 1 award and honors on record

Dmand AI lists 1 award for Dr. Bolduc.

Awards and honors for Dr. Bolduc

  1. Undated
    • Super Doc

Source: Dmand AI Professional Profile Data

Dr. Gregory M. Bolduc graduated from SUNY Upstate Medical University

Dr. Bolduc graduated from SUNY Upstate Medical University in 1991.

  1. Medical schoolSUNY Upstate Medical University
  2. Board certified in gastroenterologyAmerican Board of Internal Medicine
  3. Board certified in internal medicineAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Gregory M. Bolduc accepts plans from 12 insurance carriers

Dr. Bolduc is in network with 12 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • United Healthcare
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • Elevance
  • Molina
  • Regence Health Plans
  • +4 more carriersWith a free account

Plan types Dr. Bolduc accepts, by number of carriers

  1. Medicare8
  2. PPO7
  3. HMO6
  4. EPO4
  5. POS3
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Gregory M. Bolduc's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Gregory M. Bolduc

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Gregory M. Bolduc's NPI number?

Dr. Gregory M. Bolduc's NPI number is 1821078767. It was assigned on January 18, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Gregory M. Bolduc?

Dr. Gregory M. Bolduc is a gastroenterologist in South Weymouth, Massachusetts. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).

Where does Dr. Gregory M. Bolduc practice?

Dr. Bolduc practices at 1085 Main Street, South Weymouth, MA 02190. Dr. Bolduc's primary practice is Weymouth Endoscopy in South Weymouth, Massachusetts. Dmand AI also links Dr. Bolduc to 1 hospital, 3 group practices and clinics and 2 medical groups.

What is Dr. Gregory M. Bolduc's office phone number?

The practice phone on file for Dr. Bolduc is (781) 331-2922.

What is Dr. Gregory M. Bolduc's medical license number?

Dr. Bolduc holds Massachusetts license 78133, one of the licenses on file in 2 states.

Which states has Dr. Gregory M. Bolduc been licensed in?

Dmand AI has state licenses on file for Dr. Bolduc in Massachusetts (1993 to 2026) and Virginia (1997 to 2026).

Which hospitals is Dr. Gregory M. Bolduc affiliated with?

Dr. Bolduc is affiliated with South Shore Hospital. Dmand AI links Dr. Bolduc to 1 more hospital.

What medical group is Dr. Gregory M. Bolduc part of?

Dr. Bolduc is linked to South Shore Medical Center. Dmand AI links Dr. Bolduc to 2 more medical groups.

Does Dr. Gregory M. Bolduc accept Medicare?

Yes. CMS data shows Dr. Bolduc billed Medicare for 939 services in 2024, and Dr. Bolduc accepts Medicare assignment.

Does Dr. Gregory M. Bolduc offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Bolduc as offering telehealth services.

Show 9 more questionsShow fewer questions

What is Dr. Gregory M. Bolduc's MIPS score?

Dr. Bolduc's MIPS final score for performance year 2024 is 20 out of 100, reported individually.

How many Medicare patients does Dr. Gregory M. Bolduc see?

CMS counts 608 Medicare patients who saw Dr. Bolduc in 2024, with an average age of 74.

Is Dr. Gregory M. Bolduc board certified?

Yes. Dr. Bolduc is board certified in gastroenterology by the American Board of Internal Medicine.

What services does Dr. Gregory M. Bolduc bill to Medicare?

In 2024, Dr. Bolduc's most billed Medicare services were surgery: digestive system (45385), office visit, established patient (99213) and hospital inpatient care (99232).

Where did Dr. Gregory M. Bolduc go to medical school?

Dr. Bolduc graduated from SUNY Upstate Medical University in 1991.

What drugs does Dr. Gregory M. Bolduc prescribe most?

In 2024 Medicare Part D data, Dr. Bolduc's most prescribed drugs by claims were Omeprazole, Pantoprazole Sodium and Dicyclomine HCl.

Has Dr. Gregory M. Bolduc received payments from drug or device companies?

CMS Open Payments shows $615 in general payments to Dr. Bolduc from 8 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.

How long has Dr. Gregory M. Bolduc been practicing?

Dr. Bolduc graduated from medical school in 1991, 35 years ago.

What insurance does Dr. Gregory M. Bolduc accept?

Dr. Bolduc is in network with 12 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

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