Thomas P Mcmahon, MD in Wareham, MA - Medicare Gastroenterology

Thomas P Mcmahon, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Wareham, Massachusetts. He graduated from medical school in 1984 and has 42 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice Lakewood Health System, Lakewood Health System, Geisinger Clinic and his current practice location is 100 Rosebrook Way, Wareham, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (508) 973-4974.

Thomas P Mcmahon is licensed to practice in Massachusetts (license number 50774) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1619048030.

Contact Information

	Thomas P Mcmahon, MD
	100 Rosebrook Way, Wareham, MA 02571-1138
	(508) 973-4974
	(508) 273-4954

Map and Direction

Physician's Profile

Full Name	Thomas P Mcmahon
Gender	Male
Speciality	Gastroenterology
Experience	42 Years
Location	100 Rosebrook Way, Wareham, Massachusetts
Accepts Medicare Assignments	Yes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.

Medical Education and Training:

Thomas P Mcmahon graduated from medical school in 1984

NPI Data:

NPI Number: 1619048030
Provider Enumeration Date: 11/10/2006
Last Update Date: 02/02/2026

Medicare PECOS Information:

PECOS PAC ID: 5092893214
Enrollment ID: I20240625001029

Medical Identifiers

Medical identifiers for Thomas P Mcmahon such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1619048030	NPI	-	NPPES

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
207RG0100X	Internal Medicine - Gastroenterology	6825 (Rhode Island)	Secondary
207RG0100X	Internal Medicine - Gastroenterology	50774 (Massachusetts)	Primary

Medical Facilities Affiliation

Facility Name	Location	Facility Type
Geisinger Wyoming Valley Medical Center	Wilkes barre, PA	Hospital
Lakewood Health System	Staples, MN	Hospital
Riverside Regional Medical Center	Newport news, VA	Hospital

Group Practice Association

Group Practice Name	Group PECOS PAC ID	No. of Members
Lakewood Health System	1052229671	90
Lakewood Health System	1052229671	90
Geisinger Clinic	5395657001	3078

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Thomas P Mcmahon allows following entities to bill medicare on his behalf.

Entity Name	Geisinger Clinic
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1366493868 PECOS PAC ID: 5395657001 Enrollment ID: O20040130000518

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Thomas P Mcmahon is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing Address	Practice Location Address
Thomas P Mcmahon, MD 200 Mill Rd, Fairhaven, MA 02719-5252 Ph: (508) 973-2000	Thomas P Mcmahon, MD 100 Rosebrook Way, Wareham, MA 02571-1138 Ph: (508) 973-4974

Reviews and Comments

Internal Medicine Doctors in Wareham, MA

Dr. Charles J Kert, M.D. Gastroenterology Medicare: Accepting Medicare Assignments Practice Location: 43 High St, Wareham, MA 02571 Phone: 508-973-5919 Fax: 508-973-5916
Sirjana Dhungana Parajuli, MD Gastroenterology Medicare: May Accept Medicare Assignments Practice Location: 43 High St, Wareham, MA 02571 Phone: 508-973-5919 Fax: 508-973-5916
Bruce M Brown, MD Gastroenterology Medicare: Accepting Medicare Assignments Practice Location: 100 Rosebrook Way, Wareham, MA 02571 Phone: 508-273-4950 Fax: 508-273-1890
Paymon Kayhani, M.D. Gastroenterology Medicare: Accepting Medicare Assignments Practice Location: 43 High St, Wareham, MA 02571 Phone: 508-973-5919 Fax: 508-973-5916
Robert J Mcgowen, MD Gastroenterology Medicare: Accepting Medicare Assignments Practice Location: 100 Rosebrook Way, 2nd Floor, Wareham, MA 02571 Phone: 508-273-4950 Fax: 508-273-4951
Amy Gleason Wiegandt, MD Gastroenterology Medicare: Accepting Medicare Assignments Practice Location: 2621 Cranberry Highway, Wareham, MA 02571 Phone: 508-295-4902 Fax: 508-295-2455
Dr. Randy H. Caplan, D.O. Gastroenterology Medicare: Not Enrolled in Medicare Practice Location: 40 Church Avenue, Suite 103, Wareham, MA 02571 Phone: 508-295-3848 Fax: 508-295-4565

Thomas P Mcmahon, MD - Medicare Gastroenterology in Wareham, MA