Dr Francis X Walsh, MD in Cos Cob, CT

Dr Francis X Walsh, MD is a medicare enrolled "Internal Medicine" physician in Cos Cob, Connecticut. He went to New York Medical College and graduated in 1967 and has 58 years of diverse experience with area of expertise as Nephrology. His current practice location is 35 River Rd, Suite 200, Cos Cob, Connecticut. You can reach out to his office (for appointments etc.) via phone at (203) 661-9433.

Dr Francis X Walsh is licensed to practice in Connecticut (license number 14105) 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 1124174347.

Contact Information

	Dr Francis X Walsh, MD
	35 River Rd, Suite 200, Cos Cob, CT 06807-2717
	(203) 661-9433
	(203) 661-2918

Map and Direction

Physician's Profile

Full Name	Dr Francis X Walsh
Gender	Male
Speciality	Nephrology
Experience	58 Years
Location	35 River Rd, Cos Cob, Connecticut
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:

Dr Francis X Walsh attended and graduated from New York Medical College in 1967

NPI Data:

NPI Number: 1124174347
Provider Enumeration Date: 01/29/2007
Last Update Date: 09/11/2025

Medicare PECOS Information:

PECOS PAC ID: 0941107270
Enrollment ID: I20040224001197

Medical Identifiers

Medical identifiers for Dr Francis X Walsh such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1124174347	NPI	-	NPPES
010014105CT02	Other	CT	ANTHEM BLUE CROSS
00516867	Medicaid	NY

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
207R00000X	Internal Medicine	14105 (Connecticut)	Primary
207RN0300X	Internal Medicine - Nephrology	14105 (Connecticut)	Secondary

Medical Facilities Affiliation

Facility Name	Location	Facility Type
Greenwich Hospital Association -	Greenwich, CT	Hospital
Stamford Hospital	Stamford, CT	Hospital
Witherell, Nathaniel	Greenwich, CT	Nursing home
Edgehill Health Center	Stamford, CT	Nursing home

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. Dr Francis X Walsh allows following entities to bill medicare on his behalf.

Entity Name	Francis X Walsh Md Pc
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1902271729 PECOS PAC ID: 0143127472 Enrollment ID: O20160127002673

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. Dr Francis X Walsh 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
Dr Francis X Walsh, MD 35 River Rd, Suite 200, Cos Cob, CT 06807-2717 Ph: (203) 661-9433	Dr Francis X Walsh, MD 35 River Rd, Suite 200, Cos Cob, CT 06807-2717 Ph: (203) 661-9433

Reviews and Comments

Internal Medicine Doctors in Cos Cob, CT

Ronald M Levine, MD Internal Medicine Medicare: Not Enrolled in Medicare Practice Location: 475 Cognewaugh Rd, Cos Cob, CT 06807 Phone: 203-629-5560
Ellen N Wolfson, M.D. Internal Medicine Medicare: Not Enrolled in Medicare Practice Location: 35 River Road, Cos Cob, CT 06807 Phone: 203-625-0333 Fax: 203-625-8331
Adam Messenger, M.D. Internal Medicine Medicare: Medicare Enrolled Practice Location: 31 River Rd, 200, Cos Cob, CT 06807 Phone: 203-661-9433
Dr. Rosemary Mazanet, MD Internal Medicine Medicare: Not Enrolled in Medicare Practice Location: 24 Daffodil Ln, Cos Cob, CT 06807 Phone: 203-861-0077
Dr. Kush Patel, MD Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 40 E Putnam Ave, Cos Cob, CT 06807 Phone: 203-489-5442
Chaula K. Vora, M.D. Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 35 River Rd Ste 101, Cos Cob, CT 06807 Phone: 203-863-4750 Fax: 203-863-4580

Dr Francis X Walsh, MD - Medicare Nephrology in Cos Cob, CT