Peter Carolan, MD
NPI 1659407427 · Gastroenterology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Carolan, MD is a Gastroenterology Physician provider in Boston, MA (NPI 1659407427).
Provider details
- NPI number
- 1659407427
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- L-221790 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
349 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 77 | $102 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 55 | $140 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 46 | $255 |
| Moderate Sedation Services Provided By the Same Physician Or Other Qualified Health Care Professional Performing a Gastrointestinal Endoscopic Service That Sedation Supports, Requiring the Presence of an Independent Trained Observer to Assist in the MonitoG0500 | 46 | $6 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 35 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 147 | 51 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 119 | 112 |
| Famotidine | 79 | 26 |
| Linaclotidebrand: Linzess | 39 | 12 |
| Pantoprazole Sodium | 38 | — |
| Esomeprazole Magnesium | 30 | — |
| Sucralfate | 28 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-26
- Last updated
- 2007-07-08
Frequently asked questions
- What is Peter Carolan's NPI number?
- Peter Carolan's National Provider Identifier (NPI) is 1659407427, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Carolan's specialty?
- Peter Carolan is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Carolan located?
- Peter Carolan's practice location on file with NPPES is Massachusetts General Hospital, Boston, MA 02114.
- What is Peter Carolan's phone number?
- The practice phone number listed in the NPPES registry for Peter Carolan is (617) 724-6113.
- Does Peter Carolan accept Medicare?
- Peter Carolan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Carolan's NPI active?
- Yes — Peter Carolan's NPI (1659407427) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.