Doctor profile · Federal record
Dr. Thomas McMahon, MD
Gastroenterology Physician (CMS: Gastroenterology) · Gastroenterology Physician · Wareham, MA
- NPI 1619048030
- Accepts Medicare
- 46 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
100 Rosebrook Way
Wareham, MA 025711138
(508) 973-4974
fax (508) 273-4954 - Mailing address
-
200 Mill RD
Fairhaven, MA 027195252
Credentials & registration
- NPI registered
- November 2006 — 20 yrs on file
- Profile last updated
- February 2, 2026
- Year of graduation
- 1980 — 46 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (2)
- Massachusetts #50774 · Rhode Island #6825
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1619048030. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
114
Distinct HCPCS
6
Medicare allowed
$15,156
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 28 | 23 | $123 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 26 | 26 | $113 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 23 | 22 | $93 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 13 | 13 | $240 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 12 | 12 | $109 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 12 | 12 | $184 |
In context: peer comparison
Among 1 peers in Wareham Gastroenterology Physician, average services per provider: 19. This provider delivers 6.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
536
Patients
134
Total drug cost
$201,445
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 195 | 80 | $3,285 |
| Pantoprazole Sodium | Generic | 101 | 38 | $2,061 |
| Colestipol Hcl | Generic | 40 | 16 | $2,734 |
| Linzess (Linaclotide) | Brand | 39 | 0 | $23,580 |
| Esomeprazole Magnesium | Generic | 26 | 0 | $2,167 |
| Mesalamine | Generic | 26 | 0 | $20,193 |
| Dicyclomine Hcl | Generic | 25 | 0 | $1,133 |
| Dexlansoprazole Dr (Dexlansoprazole) | Brand | 24 | 0 | $10,603 |
| Azathioprine | Generic | 13 | 0 | $1,170 |
| Humira(Cf) Pen (Adalimumab) | Brand | 13 | 0 | $128,179 |
Frequently asked questions
What is Dr. Thomas McMahon's medical specialty?
Dr. Thomas McMahon practices Gastroenterology Physician in Wareham, MA.
Where does Dr. Thomas McMahon practice?
Dr. Thomas McMahon practices at 100 Rosebrook Way, Wareham, MA 025711138. Office phone: 5089734974.
What is Dr. Thomas McMahon's NPI?
Dr. Thomas McMahon's National Provider Identifier (NPI) is 1619048030, issued by NPPES.
Does Dr. Thomas McMahon accept Medicare assignment?
Yes. Dr. Thomas McMahon accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Thomas McMahon commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.