Gary Altwerger, MD in Chicago, IL - Medicare Obstetrics/gynecology

Gary Altwerger, MD is a medicare enrolled "Obstetrics & Gynecology - Gynecologic Oncology" physician in Chicago, Illinois. He went to State University Of New York At Buffalo School Of Medicine and graduated in 2012 and has 13 years of diverse experience with area of expertise as Obstetrics/gynecology. He is a member of the group practice Yale University and his current practice location is 5841 S Maryland Ave, Chicago, Illinois. You can reach out to his office (for appointments etc.) via phone at (888) 824-0200.

Gary Altwerger is licensed to practice in Illinois (license number 036176993) 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 1407114630.

Contact Information

	Gary Altwerger, MD
	5841 S Maryland Ave, Chicago, IL 60637-1443
	(888) 824-0200
	Not Available

Map and Direction

Physician's Profile

Full Name	Gary Altwerger
Gender	Male
Speciality	Obstetrics/gynecology
Experience	13 Years
Location	5841 S Maryland Ave, Chicago, Illinois
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:

Gary Altwerger attended and graduated from State University Of New York At Buffalo School Of Medicine in 2012

NPI Data:

NPI Number: 1407114630
Provider Enumeration Date: 04/25/2012
Last Update Date: 10/24/2025

Medicare PECOS Information:

PECOS PAC ID: 2466769849
Enrollment ID: I20160805001059

Medical Identifiers

Medical identifiers for Gary Altwerger such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1407114630	NPI	-	NPPES

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
207VX0201X	Obstetrics & Gynecology - Gynecologic Oncology	036176993 (Illinois)	Primary

Medical Facilities Affiliation

Facility Name	Location	Facility Type
Yale-new Haven Hospital	New haven, CT	Hospital
Bridgeport Hospital	Bridgeport, CT	Hospital
Lawrence & Memorial Hospital	New london, CT	Hospital

Group Practice Association

Group Practice Name	Group PECOS PAC ID	No. of Members
Yale University	9436061736	2389

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. Gary Altwerger allows following entities to bill medicare on his behalf.

Entity Name	Yale University
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1205822236 PECOS PAC ID: 9436061736 Enrollment ID: O20031105000015

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. Gary Altwerger 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
Gary Altwerger, MD 150 Harvester Dr Ste 300, Burr Ridge, IL 60527-5965 Ph: () -	Gary Altwerger, MD 5841 S Maryland Ave, Chicago, IL 60637-1443 Ph: (888) 824-0200

Reviews and Comments

Obstetrics & Gynecology Doctors in Chicago, IL

Elizabeth Isak, Obstetrics & Gynecology Medicare: Accepting Medicare Assignments Practice Location: 680 N Lake Shore Dr Ste 810, Chicago, IL 60611 Phone: 312-926-8811 Fax: 312-926-8855
Malavika Kalyani Perinchery, MD Obstetrics & Gynecology Medicare: Medicare Enrolled Practice Location: 5841 S Maryland Ave # Mc2050, Chicago, IL 60637 Phone: 773-834-0598
Margaret C Schermerhorn, MD Obstetrics & Gynecology Medicare: Medicare Enrolled Practice Location: 1620 W Harrison St, Chicago, IL 60612 Phone: 312-942-5000
Emily Gaffney Gleason, Obstetrics & Gynecology Medicare: Not Enrolled in Medicare Practice Location: 251 E Huron St, Chicago, IL 60611 Phone: 312-926-2000
Maria Teresa Tam, MD Obstetrics & Gynecology Medicare: Accepting Medicare Assignments Practice Location: 2845 N Sheridan Rd, Ste 902, Chicago, IL 60657 Phone: 773-904-8641 Fax: 872-888-1206
Mr. Clyde Harris Lawson, MD Obstetrics & Gynecology Medicare: Not Enrolled in Medicare Practice Location: 8234 S. Ashland Avenue, Chicago, IL 60620 Phone: 773-874-1400 Fax: 773-874-9245
Rebekah Osgood, M.D. Obstetrics & Gynecology Medicare: Accepting Medicare Assignments Practice Location: 680 N Lake Shore Dr Ste 810, Chicago, IL 60611 Phone: 312-926-3627 Fax: 312-587-9802

Gary Altwerger, MD - Medicare Obstetrics/gynecology in Chicago, IL