Dr Jeffrey Robert Unger, MD in Rancho Cucamonga, CA

Dr Jeffrey Robert Unger, MD is a medicare enrolled "Internal Medicine - Endocrinology, Diabetes & Metabolism" physician in Rancho Cucamonga, California. He went to Northwestern University Feinberg Medical School and graduated in 1980 and has 46 years of diverse experience with area of expertise as Internal Medicine. His current practice location is 9220 Haven Ave Ste 230, Rancho Cucamonga, California. You can reach out to his office (for appointments etc.) via phone at (909) 590-8409.

Dr Jeffrey Robert Unger is licensed to practice in California (license number G45569) and he also participates in the medicare program. He may accept medicare assignments (which means he may accept the Medicare-approved amount; you may be billed for more than the Medicare deductible and coinsurance) and his NPI Number is 1003856188.

Contact Information

	Dr Jeffrey Robert Unger, MD
	9220 Haven Ave Ste 230, Rancho Cucamonga, CA 91730-8565
	(909) 590-8409
	(909) 590-8695

Map and Direction

Physician's Profile

Full Name	Dr Jeffrey Robert Unger
Gender	Male
Speciality	Internal Medicine
Experience	46 Years
Location	9220 Haven Ave Ste 230, Rancho Cucamonga, California
Accepts Medicare Assignments	May be. He may accept the Medicare-approved amount; you may be billed for more than the Medicare deductible and coinsurance.

Medical Education and Training:

Dr Jeffrey Robert Unger attended and graduated from Northwestern University Feinberg Medical School in 1980

NPI Data:

NPI Number: 1003856188
Provider Enumeration Date: 06/07/2006
Last Update Date: 05/18/2026

Medicare PECOS Information:

PECOS PAC ID: 8820092844
Enrollment ID: I20081010000546

Medical Identifiers

Medical identifiers for Dr Jeffrey Robert Unger such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1003856188	NPI	-	NPPES

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
207RE0101X	Internal Medicine - Endocrinology, Diabetes & Metabolism	G45569 (California)	Primary
207Q00000X	Family Medicine	G45569 (California)	Secondary

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 Jeffrey Robert Unger allows following entities to bill medicare on his behalf.

Entity Name	Jeffrey R Unger Md Inc
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1750556346 PECOS PAC ID: 6305914813 Enrollment ID: O20081010000588

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 Jeffrey Robert Unger 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 Jeffrey Robert Unger, MD 9220 Haven Ave Ste 230, Rancho Cucamonga, CA 91730-8565 Ph: (909) 484-2105	Dr Jeffrey Robert Unger, MD 9220 Haven Ave Ste 230, Rancho Cucamonga, CA 91730-8565 Ph: (909) 590-8409

Reviews and Comments

Internal Medicine Doctors in Rancho Cucamonga, CA

Behnam Ebrahimi, M.D. Endocrinology, Diabetes & Metabolism Medicare: Accepting Medicare Assignments Practice Location: 12577 Naples Way, Rancho Cucamonga, CA 91739 Phone: 714-281-2993
Catherine Joy Cabugao, Endocrinology, Diabetes & Metabolism Medicare: Accepting Medicare Assignments Practice Location: 10841 White Oak Ave Ste 107, Rancho Cucamonga, CA 91730 Phone: 909-466-8888
Muhammad Bader Hammami, M.D. Endocrinology, Diabetes & Metabolism Medicare: Accepting Medicare Assignments Practice Location: 9140 Haven Ave Ste 115, Rancho Cucamonga, CA 91730 Phone: 909-606-4860
Dr. Vatsal Haren Mody, MD Endocrinology, Diabetes & Metabolism Medicare: Accepting Medicare Assignments Practice Location: 10832 Laurel St Ste 101, Rancho Cucamonga, CA 91730 Phone: 909-477-3015
Hetalben Makwana, MD Endocrinology, Diabetes & Metabolism Medicare: Accepting Medicare Assignments Practice Location: 9190 Haven Ave Ste 102, Rancho Cucamonga, CA 91730 Phone: 909-981-0989 Fax: 909-949-6214
Tuan A Pham, M.D. Endocrinology, Diabetes & Metabolism Medicare: Accepting Medicare Assignments Practice Location: 9333 Baseline Rd, Ste. 160, Rancho Cucamonga, CA 91730 Phone: 909-941-4777 Fax: 909-941-4599

Dr Jeffrey Robert Unger, MD - Medicare Internal Medicine in Rancho Cucamonga, CA