Ahmad Osama Rez, MD in Alton, IL - Medicare Internal Medicine

Ahmad Osama Rez, MD is a medicare enrolled "Hospitalist" physician in Alton, Illinois. He graduated from medical school in 2003 and has 22 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Galen Inpatient Physicians Pc, Galen Inpatient Physicians Pc and his current practice location is 1 Saint Anthonys Way, Alton, Illinois. You can reach out to his office (for appointments etc.) via phone at (314) 317-0600.

Ahmad Osama Rez is licensed to practice in Illinois (license number 036.131216) 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 1356537179.

Contact Information

	Ahmad Osama Rez, MD
	1 Saint Anthonys Way, Alton, IL 62002-4568
	(314) 317-0600
	(314) 317-0606

Map and Direction

Physician's Profile

Full Name	Ahmad Osama Rez
Gender	Male
Speciality	Internal Medicine
Experience	22 Years
Location	1 Saint Anthonys Way, Alton, 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:

Ahmad Osama Rez graduated from medical school in 2003

NPI Data:

NPI Number: 1356537179
Provider Enumeration Date: 09/16/2007
Last Update Date: 09/19/2025

Medicare PECOS Information:

PECOS PAC ID: 1951435510
Enrollment ID: I20100818000219

Medical Identifiers

Medical identifiers for Ahmad Osama Rez such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1356537179	NPI	-	NPPES

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
208M00000X	Hospitalist	2010014085 (Missouri)	Secondary
208M00000X	Hospitalist	036131216 (Illinois)	Secondary
208M00000X	Hospitalist	036.131216 (Illinois)	Primary
207R00000X	Internal Medicine	036.131216 (Illinois)	Secondary

Medical Facilities Affiliation

Facility Name	Location	Facility Type
Ssm St Clare Health Center	Fenton, MO	Hospital
Missouri Baptist Medical Center	Town and country, MO	Hospital

Group Practice Association

Group Practice Name	Group PECOS PAC ID	No. of Members
Galen Inpatient Physicians Pc	3678464633	692
Galen Inpatient Physicians Pc	3678464633	692

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. Ahmad Osama Rez allows following entities to bill medicare on his behalf.

Entity Name	Galen Inpatient Physicians Pc
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1538714688 PECOS PAC ID: 3678464633 Enrollment ID: O20191115000362

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. Ahmad Osama Rez 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
Ahmad Osama Rez, MD 12101 Woodcrest Executive Dr, Suite 210, Saint Louis, MO 63141-5047 Ph: (314) 317-0600	Ahmad Osama Rez, MD 1 Saint Anthonys Way, Alton, IL 62002-4568 Ph: (314) 317-0600

Reviews and Comments

Hospitalist Doctors in Alton, IL

Winnie Shaba, MD Hospitalist Medicare: Not Enrolled in Medicare Practice Location: 1 Memorial Dr, Alton, IL 62002 Phone: 618-463-7240 Fax: 618-463-7216
Dr. John Albert Richards Jr., M.D. Hospitalist Medicare: Accepting Medicare Assignments Practice Location: 1 Memorial Dr, Alton, IL 62002 Phone: 618-463-7240 Fax: 618-463-7216
Dr. Sewuese Akuse, MD Hospitalist Medicare: May Accept Medicare Assignments Practice Location: 1 Memorial Dr, Alton, IL 62002 Phone: 618-463-7240 Fax: 618-463-7216
Dr. Nazanin Kheirkhahan, MD Hospitalist Medicare: Accepting Medicare Assignments Practice Location: 1 Memorial Dr, Alton, IL 62002 Phone: 618-463-7240 Fax: 618-463-7216

Ahmad Osama Rez, MD - Medicare Internal Medicine in Alton, IL