Dr Karthik Gunachelvan, in Darien, CT - Medicare Internal Medicine

Dr Karthik Gunachelvan, is a medicare enrolled "Internal Medicine" physician in Darien, Connecticut. He graduated from medical school in 2013 and has 12 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Riverbend Medical Group Inc, Select Rehabilitation Llc and his current practice location is 1500 Post Rd Ste 100, Darien, Connecticut. You can reach out to his office (for appointments etc.) via phone at (203) 655-8749.

Dr Karthik Gunachelvan is licensed to practice in Connecticut (license number 82825) 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 1740604941.

Contact Information

	Dr Karthik Gunachelvan,
	1500 Post Rd Ste 100, Darien, CT 06820-5936
	(203) 655-8749
	(203) 656-0701

Map and Direction

Physician's Profile

Full Name	Dr Karthik Gunachelvan
Gender	Male
Speciality	Internal Medicine
Experience	12 Years
Location	1500 Post Rd Ste 100, Darien, 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 Karthik Gunachelvan graduated from medical school in 2013

NPI Data:

NPI Number: 1740604941
Provider Enumeration Date: 02/07/2014
Last Update Date: 10/21/2025

Medicare PECOS Information:

PECOS PAC ID: 6103104211
Enrollment ID: I20161025000455

Medical Identifiers

Medical identifiers for Dr Karthik Gunachelvan such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1740604941	NPI	-	NPPES

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
207R00000X	Internal Medicine	82825 (Connecticut)	Primary

Medical Facilities Affiliation

Facility Name	Location	Facility Type
Elara Caring	Newton, MA	Home health agency
Baystate Home Health	Springfield, MA	Home health agency
Mercy Medical Ctr	Springfield, MA	Hospital
Baystate Medical Center	Springfield, MA	Hospital

Group Practice Association

Group Practice Name	Group PECOS PAC ID	No. of Members
Riverbend Medical Group Inc	5698064343	207
Select Rehabilitation Llc	9032020490	1538

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 Karthik Gunachelvan allows following entities to bill medicare on his behalf.

Entity Name	Riverbend Medical Group Inc
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1841651197 PECOS PAC ID: 5698064343 Enrollment ID: O20160614001710

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 Karthik Gunachelvan 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 Karthik Gunachelvan, 1500 Post Rd Ste 100, Darien, CT 06820-5936 Ph: (203) 655-8749	Dr Karthik Gunachelvan, 1500 Post Rd Ste 100, Darien, CT 06820-5936 Ph: (203) 655-8749

Reviews and Comments

Internal Medicine Doctors in Darien, CT

Dr. Lawrence Paul-anthony Debellis, DO, MS Internal Medicine Medicare: May Accept Medicare Assignments Practice Location: 36 Old Kings Hwy S Ste 200, Darien, CT 06820 Phone: 203-852-2270
Dr. William James Giesen, M.D. Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 1500 Post Rd., Darien, CT 06820 Phone: 203-655-2516 Fax: 203-656-3665
Dr. Victor John William Lawrence, M.D. Internal Medicine Medicare: Not Enrolled in Medicare Practice Location: 29 Thomasina Ln, Darien, CT 06820 Phone: 203-655-4319 Fax: 203-655-4319
Dr. Amanda C Collins- Baine, M.D. Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 53 Old Kings Hwy N Ste 205, Darien, CT 06820 Phone: 203-286-5604 Fax: 475-328-9072
Margaret Baran, Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 1500 Post Rd Ste 100, Darien, CT 06820 Phone: 203-655-8749 Fax: 203-655-0701
Dr. Robert A Lindberg, M.D. Internal Medicine Medicare: Not Enrolled in Medicare Practice Location: 1500 Post Rd, Darien, CT 06820 Phone: 203-656-1012 Fax: 203-656-1005
Sujana Sunkara, MD Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 1500 Post Rd, Darien, CT 06820 Phone: 203-655-8749 Fax: 203-656-0701

Dr Karthik Gunachelvan, - Medicare Internal Medicine in Darien, CT