Jason Haas, DO in Chesterfield, MO - Medicare Gastroenterology

Jason Haas, DO is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Chesterfield, Missouri. He went to At Still University Of Health Sciences, College Of Osteo Med, Kirksville and graduated in 2008 and has 18 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice Gateway Gastroenterology Inc and his current practice location is 121 Saint Lukes Center Dr Ste 406, Chesterfield, Missouri. You can reach out to his office (for appointments etc.) via phone at (314) 529-4900.

Jason Haas is licensed to practice in Missouri (license number 2014006550) 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 1790948008.

Contact Information

	Jason Haas, DO
	121 Saint Lukes Center Dr Ste 406, Chesterfield, MO 63017
	(314) 529-4900
	(314) 434-2679

Map and Direction

Physician's Profile

Full Name	Jason Haas
Gender	Male
Speciality	Gastroenterology
Experience	18 Years
Location	121 Saint Lukes Center Dr Ste 406, Chesterfield, Missouri
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:

Jason Haas attended and graduated from At Still University Of Health Sciences, College Of Osteo Med, Kirksville in 2008

NPI Data:

NPI Number: 1790948008
Provider Enumeration Date: 07/07/2008
Last Update Date: 06/08/2025

Medicare PECOS Information:

PECOS PAC ID: 8022232883
Enrollment ID: I20140617002213

Medical Identifiers

Medical identifiers for Jason Haas such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1790948008	NPI	-	NPPES
1790948008	Medicaid	MO
200015314	Medicaid	MO

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
207RG0100X	Internal Medicine - Gastroenterology	2014006550 (Missouri)	Primary

Medical Facilities Affiliation

Facility Name	Location	Facility Type
St Lukes Hospital	Chesterfield, MO	Hospital

Group Practice Association

Group Practice Name	Group PECOS PAC ID	No. of Members
Gateway Gastroenterology Inc	2668448713	12

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. Jason Haas allows following entities to bill medicare on his behalf.

Entity Name	Gateway Gastroenterology Inc
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1043250400 PECOS PAC ID: 2668448713 Enrollment ID: O20040909000422

Entity Name	Lester E Cox Medical Centers
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1174952212 PECOS PAC ID: 1658509864 Enrollment ID: O20140115001602

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. Jason Haas 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
Jason Haas, DO 121 Saint Lukes Center Dr Ste 406, Chesterfield, MO 63017-3519 Ph: (314) 529-4900	Jason Haas, DO 121 Saint Lukes Center Dr Ste 406, Chesterfield, MO 63017 Ph: (314) 529-4900

Reviews and Comments

Internal Medicine Doctors in Chesterfield, MO

Rachel Lynn Fishman Oiknine, M.D. Gastroenterology Medicare: Accepting Medicare Assignments Practice Location: 222 S Woods Mill Rd, Suite 410n, Chesterfield, MO 63017 Phone: 314-469-6224 Fax: 314-469-0744
Xiaoling Wu, MD Gastroenterology Medicare: Medicare Enrolled Practice Location: 224 S Woods Mill Rd, Suite 370 South, Chesterfield, MO 63017 Phone: 314-878-2460
Michael Carl Fusco, M.D. Gastroenterology Medicare: Not Enrolled in Medicare Practice Location: 14528 S Outer 40, Suite 300, Chesterfield, MO 63017 Phone: 314-214-8100 Fax: 314-214-8233
David H Cort, M.D. Gastroenterology Medicare: Medicare Enrolled Practice Location: 226 S Woods Mill Rd, Suite 52 West, Chesterfield, MO 63017 Phone: 314-434-2399 Fax: 314-434-5653
Meghashyam Jayateerth Koti, MD Gastroenterology Medicare: Not Enrolled in Medicare Practice Location: 15740 S Outer 40 Rd # C, Chesterfield, MO 63017 Phone: 636-735-4963
Muhammad Arsalan, MD Gastroenterology Medicare: Not Enrolled in Medicare Practice Location: 224 S Woods Mill Rd Ste 400, Chesterfield, MO 63017 Phone: 314-205-6050 Fax: 314-205-6350
Svetha Chunduri, M.D. Gastroenterology Medicare: Accepting Medicare Assignments Practice Location: 224 S Woods Mill Rd # 404s, Chesterfield, MO 63017 Phone: 314-682-6500 Fax: 314-552-7276

Jason Haas, DO - Medicare Gastroenterology in Chesterfield, MO