Alexa Jo Duling Williams, MD in O Fallon, MO - Medicare Obstetrics/gynecology

Alexa Jo Duling Williams, MD is a medicare enrolled "Obstetrics & Gynecology" physician in O Fallon, Missouri. She went to University Of Arizona College Of Medicine and graduated in 2017 and has 8 years of diverse experience with area of expertise as Obstetrics/gynecology. She is a member of the group practice Mercy Clinic East Communities and her current practice location is 1101 Highway K, O Fallon, Missouri. You can reach out to her office (for appointments etc.) via phone at (636) 379-6363.

Alexa Jo Duling Williams is licensed to practice in Missouri (license number 2021013439) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1972033652.

Contact Information

	Alexa Jo Duling Williams, MD
	1101 Highway K, O Fallon, MO 63366-8431
	(636) 379-6363
	Not Available

Map and Direction

Physician's Profile

Full Name	Alexa Jo Duling Williams
Gender	Female
Speciality	Obstetrics/gynecology
Experience	8 Years
Location	1101 Highway K, O Fallon, Missouri
Accepts Medicare Assignments	Yes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.

Medical Education and Training:

Alexa Jo Duling Williams attended and graduated from University Of Arizona College Of Medicine in 2017

NPI Data:

NPI Number: 1972033652
Provider Enumeration Date: 06/15/2017
Last Update Date: 11/10/2025

Medicare PECOS Information:

PECOS PAC ID: 6204230352
Enrollment ID: I20210811002105

Medical Identifiers

Medical identifiers for Alexa Jo Duling Williams such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1972033652	NPI	-	NPPES

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
207V00000X	Obstetrics & Gynecology	2021013439 (Missouri)	Primary
207V00000X	Obstetrics & Gynecology	2017019537 (Missouri)	Secondary

Medical Facilities Affiliation

Facility Name	Location	Facility Type
Mercy Hospital St Louis	Saint louis, MO	Hospital
Mercy Hospital South	Saint louis, MO	Hospital

Group Practice Association

Group Practice Name	Group PECOS PAC ID	No. of Members
Mercy Clinic East Communities	7214827922	535

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. Alexa Jo Duling Williams allows following entities to bill medicare on her behalf.

Entity Name	Mercy Clinic East Communities
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1851335228 PECOS PAC ID: 7214827922 Enrollment ID: O20070521000006

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. Alexa Jo Duling Williams 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
Alexa Jo Duling Williams, MD Po Box 955534, Saint Louis, MO 63195-5534 Ph: (557) 203-1531	Alexa Jo Duling Williams, MD 1101 Highway K, O Fallon, MO 63366-8431 Ph: (636) 379-6363

Reviews and Comments

Obstetrics & Gynecology Doctors in O Fallon, MO

Michael B Chen, M.D. Obstetrics & Gynecology Medicare: Medicare Enrolled Practice Location: 20 Progress Point Pkwy, Suite 100, O Fallon, MO 63368 Phone: 636-344-3105 Fax: 636-344-3104
Dr. Leah Rose Glass, D.O. Obstetrics & Gynecology Medicare: Accepting Medicare Assignments Practice Location: 300 Winding Woods Dr, Suite 200, O Fallon, MO 63366 Phone: 636-240-0130 Fax: 636-240-6822
Jamie L. Puckett, M.D. Obstetrics & Gynecology Medicare: Accepting Medicare Assignments Practice Location: 1101 Highway K, O Fallon, MO 63366 Phone: 636-379-6363
Dr. Margaretta Lynn Mendenhall, M.D. Obstetrics & Gynecology Medicare: Accepting Medicare Assignments Practice Location: 300 Winding Woods Dr, Suite 200, O Fallon, MO 63366 Phone: 636-240-0130 Fax: 636-240-6822
Dr. Danielle Suzanne Grunloh-gumpenberger, MD Obstetrics & Gynecology Medicare: Accepting Medicare Assignments Practice Location: 300 Winding Woods Dr Ste 200, O Fallon, MO 63366 Phone: 636-240-0130
Dr. Emma Rose Eubanks, MD Obstetrics & Gynecology Medicare: Accepting Medicare Assignments Practice Location: 1101 State Highway K, O Fallon, MO 63366 Phone: 636-379-6363
Dr. Christine C Cortadillo, D.O. Obstetrics & Gynecology Medicare: Medicare Enrolled Practice Location: 1101 Highway K, O Fallon, MO 63366 Phone: 636-379-6363 Fax: 636-379-1297

Alexa Jo Duling Williams, MD - Medicare Obstetrics/gynecology in O Fallon, MO