Doctor profile · Federal record
Dr. Gregory McCarthy, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Geriatric Medicine (Internal Medicine) Physician · Gastroenterology Physician · Manchester, NH
- NPI 1942393525
- Accepts Medicare
- 46 yrs in practice
- Licensed in 2 states
- Male
- Solo practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
100 Hitchcock Way
Manchester, NH 031044125
(603) 695-2500
fax (603) 369-6365 - Additional location
-
2030 Mountain View Ave
Longmont, CO 805013178
(720) 652-8650
fax (720) 652-8655
Credentials & registration
- NPI registered
- October 2006 — 20 yrs on file
- Profile last updated
- August 19, 2022
- Year of graduation
- 1980 — 46 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (2)
- New Hampshire #7256 · Colorado #CDR.0000643
- Medicaid
- NH #3081639
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1942393525. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
255
Distinct HCPCS
6
Medicare allowed
$32,445
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
G0500 |
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 monito | 75 | 75 | $5 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 46 | 46 | $248 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 44 | 44 | $152 | |
G0121 |
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | 43 | 43 | $183 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 25 | 25 | $87 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 22 | 22 | $178 |
In context: peer comparison
Among 5 peers in this city , average services per provider: 55. This provider delivers 4.6× the peer median.Open Payments
Industry payments received
All-time total
$27
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Boston Scientific Corporation | 1 | $27.14 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
60
Patients
60
Total drug cost
$1,082
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Gavilyte-G (Peg3350/Sod Sulf,bicarb,cl/Kcl) | Brand | 49 | 49 | $908 |
| Peg-3350 And Electrolytes (Peg3350/Sod Sulf,bicarb,cl/Kcl) | Brand | 11 | 11 | $174 |
Hospital affiliations
Frequently asked questions
What is Dr. Gregory McCarthy's medical specialty?
Dr. Gregory McCarthy practices Gastroenterology Physician in Manchester, NH.
Where does Dr. Gregory McCarthy practice?
Dr. Gregory McCarthy practices at 100 Hitchcock Way, Manchester, NH 031044125. Office phone: 6036952500.
What is Dr. Gregory McCarthy's NPI?
Dr. Gregory McCarthy's National Provider Identifier (NPI) is 1942393525, issued by NPPES.
Does Dr. Gregory McCarthy accept Medicare assignment?
Yes. Dr. Gregory McCarthy accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gregory McCarthy commonly perform?
Top Medicare-reported procedures in 2023: 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 monito (HCPCS G0500); Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385); Biopsy of large bowel using a flexible endoscope (HCPCS 45380). Source: CMS Medicare Physician & Other Practitioners file.