Physician Profile
Unclaimed ProfileAbout MCCARTHY
Gregory M McCarthy, M.D. is a healthcare provider in Manchester, NH specialising in gastroenterology. Gregory is also listed as specialising in geriatric medicine.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. McCarthy specialise in?
Dr. McCarthy is a gastroenterology in Manchester, NH. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
Where is Dr. McCarthy located?
Dr. McCarthy is listed at 100 HITCHCOCK WAY, Manchester, NH 03104. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. McCarthy's phone number?
The number on file is (603) 695-2500. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. McCarthy?
Dr. McCarthy's National Provider Identifier is 1942393525. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. McCarthy go to medical school?
Dr. McCarthy attended Other, graduating in 1980. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. McCarthy have?
Dr. McCarthy has 46 years experience. Calculated from a graduation year of 1980, reported in the CMS National Downloadable File.
CMS public data
What does Dr. McCarthy do most often?
According to Medicare billing data, Dr. McCarthy performs procedures including biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, biopsy of large bowel using a flexible endoscope and removal of polyps or growths of large bowel using an endoscope with mechanical snare, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. McCarthy's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. McCarthy. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (603) 695-2500
- Email not available
Practice Locations
100 HITCHCOCK WAY
Manchester, NH 03104
Procedures Most Often Billed to Medicare
342 services · 339 patients · 9 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
67 |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
61 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
53 |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
21 |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43235 |
21 |
| Insertion of guide wire with dilation of esophagus using a flexible endoscope | Procedure | 43248 |
13 |
| Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | Billing code | G0121 |
41 |
| Colorectal cancer screening; colonoscopy on individual at high risk | Billing code | G0105 |
37 |
| Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | Office visit | 99221 |
28 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other gastroenterology specialists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 4
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 31 related providers in 4 groups
Other gastroenterology specialists in Manchester 7
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1980 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 8
Providers in NH who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.