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THOMAS P. MCMAHON MD
NPI 1619048030
Internal Medicine - Gastroenterology in Wareham, MA

Active since November 10, 2006PECOS EnrolledAccepts Medicare Assignment
100 ROSEBROOK WAY, WAREHAM, MA 02571(508) 973-4974(508) 273-4954 Get Directions Write a Review

NPPES record last updated: February 2, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Thomas P. Mcmahon Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

THOMAS P. MCMAHON MD (NPI 1619048030) is an individual gastroenterology provider in Wareham, Massachusetts, licensed in Massachusetts (50774) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS, is affiliated with Southcoast Hospitals Group, and is a graduate of Other (1980).

NPPES Registry Identity

NPI1619048030
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameTHOMAS P. MCMAHONCredential: MD
Location Address100 ROSEBROOK WAYWareham, MA 02571-1138
Mailing Address200 Mill RdFairhaven, MA 02719-5252 · (508) 973-2000 · Fax (508) 973-2001
Phone(508) 973-4974
Fax(508) 273-4954
Sole ProprietorNo
Medical School CMSOtherGraduated 1980
Enumeration DateNovember 10, 2006
Last NPPES UpdateFebruary 2, 2026
NPPES CertifiedFebruary 2, 2026
✔ NPI 1619048030 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Licenses✔ Licensed in MA · 50774✔ Licensed in RI · 6825
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
100 ROSEBROOK WAY, Wareham, MA 02571
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Medica.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Thomas P. Mcmahon Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5092893214
PECOS Enrollment IDI20240625001029, I20260116000202
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
45 services43 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
22 services22 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
12 services12 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Southcoast Hospitals Group

Acute Care Hospitals · Fall River, MA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220074
Location363 Highland AvenueFall River, MA 02720 · Bristol County
Emergency services Birthing friendly

Lakewood Health System

Critical Access Hospitals · Staples, MN
OwnershipVoluntary non-profit - Other
CMS Certification Number241329
Location49725 County Road 83Staples, MN 56479 · Todd County
Emergency services

Geisinger Wyoming Valley Medical Center

Acute Care Hospitals · Wilkes Barre, PA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390270
Location1000 East Mountain BoulevardWilkes Barre, PA 18711 · Luzerne County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02571 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$134.47 typical visit price
range $58.86 – $177.36
Typical copayment $33.61 (range $14.71 – $44.34)
Most-billed visit code 99204
Established Patient
$103.48 typical visit price
range $19.11 – $144.84
Typical copayment $25.87 (range $4.77 – $36.21)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

RAYFORD S. KRUGER JR. M.D.
Surgery
100 ROSEBROOK WAY, 3RD FL
WAREHAM, MA 02571
Plymouth County (508) 273-4900
OLIVIA DUHAIME
Surgery
100 ROSEBROOK WAY
WAREHAM, MA 02571
Plymouth County (508) 273-4901
KAREN A HUSSION ANP-BC
Nurse Practitioner (Adult Health)
100 ROSEBROOK WAY, 2ND FLOOR
WAREHAM, MA 02571
Plymouth County (508) 273-4950
RACHEL E. FORTES N.P.
Nurse Practitioner (Family)
100 ROSEBROOK WAY
WAREHAM, MA 02571
Plymouth County (508) 273-4900
KATIE CAMARA
Nurse Practitioner
100 ROSEBROOK WAY
WAREHAM, MA 02571
Plymouth County (508) 273-4950
DR. APRIL FASEL PHARMD
Pharmacist (Ambulatory Care)
100 ROSEBROOK WAY
WAREHAM, MA 02571
Plymouth County (508) 273-4950
THOMAS SPIRO P.A.
Physician Assistant
100 ROSEBROOK WAY, SOUTHCOAST PHYSICIAN SERVICES, INC 2ND FLOOR
WAREHAM, MA 02571
Plymouth County (508) 273-4950
BRUCE M BROWN MD
Internal Medicine (Cardiovascular Disease)
100 ROSEBROOK WAY
WAREHAM, MA 02571
Plymouth County (508) 273-4950

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Thomas Mcmahon's NPI number?

The NPI number for Thomas Mcmahon is 1619048030. It was assigned to this individual provider in the NPPES registry on November 10, 2006.

Where is Thomas Mcmahon located?

Thomas Mcmahon practices at 100 Rosebrook Way, Wareham, MA 02571. The listed phone number is (508) 973-4974.

What is Thomas Mcmahon's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Thomas Mcmahon enrolled in Medicare?

Yes. Thomas Mcmahon is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Thomas Mcmahon accept?

Health plans from Medica list Thomas Mcmahon as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Thomas Mcmahon affiliated with any hospitals?

According to CMS data, Thomas Mcmahon is affiliated with Southcoast Hospitals Group, Lakewood Health System and Geisinger Wyoming Valley Medical Center.

When was this NPI record last updated?

The NPPES record for Thomas Mcmahon was last updated on February 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.