David Alan Janssen, MD in O Fallon, MO - Medicare Infectious Disease

David Alan Janssen, MD is a medicare enrolled "Internal Medicine - Infectious Disease" physician in O Fallon, Missouri. He went to Indiana University School Of Medicine and graduated in 1988 and has 38 years of diverse experience with area of expertise as Infectious Disease. He is a member of the group practice Fairview Heights Medical Group Sc, Fairview Heights Medical Group Sc and his current practice location is 20 Progress Point Pkwy Ste 206, O Fallon, Missouri. You can reach out to his office (for appointments etc.) via phone at (636) 344-2014.

David Alan Janssen is licensed to practice in Missouri (license number 208810309) 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 1700995339.

Contact Information

	David Alan Janssen, MD
	20 Progress Point Pkwy Ste 206, O Fallon, MO 63368-2207
	(636) 344-2014
	(314) 747-1476

Map and Direction

Physician's Profile

Full Name	David Alan Janssen
Gender	Male
Speciality	Infectious Disease
Experience	38 Years
Location	20 Progress Point Pkwy Ste 206, O Fallon, 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:

David Alan Janssen attended and graduated from Indiana University School Of Medicine in 1988

NPI Data:

NPI Number: 1700995339
Provider Enumeration Date: 08/29/2006
Last Update Date: 10/21/2025

Medicare PECOS Information:

PECOS PAC ID: 3173622339
Enrollment ID: I20251031003877

Medical Identifiers

Medical identifiers for David Alan Janssen such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1700995339	NPI	-	NPPES

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
207RI0200X	Internal Medicine - Infectious Disease	208810309 (Missouri)	Primary
174400000X	Specialist	103905 (Missouri)	Secondary
207RI0200X	Internal Medicine - Infectious Disease	036176531 (Illinois)	Secondary

Medical Facilities Affiliation

Facility Name	Location	Facility Type
Parkland Health Center	Farmington, MO	Hospital
Progress West Hospital	O fallon, MO	Hospital

Group Practice Association

Group Practice Name	Group PECOS PAC ID	No. of Members
Fairview Heights Medical Group Sc	6800784083	452
Fairview Heights Medical Group Sc	6800784083	452

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. David Alan Janssen 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
David Alan Janssen, MD 20 Progress Point Pkwy Ste 206, O Fallon, MO 63368-2207 Ph: (636) 344-2014	David Alan Janssen, MD 20 Progress Point Pkwy Ste 206, O Fallon, MO 63368-2207 Ph: (636) 344-2014

Reviews and Comments

Internal Medicine Doctors in O Fallon, MO

Eldad Shaul Bialecki, M.D. Infectious Disease Medicare: Accepting Medicare Assignments Practice Location: 20 Progress Point Pkwy Ste 206, O Fallon, MO 63368 Phone: 636-344-1073 Fax: 636-344-1075
Brian A Grus, MD Infectious Disease Medicare: Accepting Medicare Assignments Practice Location: 20 Progress Point Pkwy Ste 108, O Fallon, MO 63368 Phone: 636-344-2400
Nadia Zia, MD Infectious Disease Medicare: Accepting Medicare Assignments Practice Location: 2 Progress Point Ct, O Fallon, MO 63368 Phone: 314-317-0600 Fax: 314-317-0606
Dr. Amy Kathleen Davis, M.D. Infectious Disease Medicare: Not Enrolled in Medicare Practice Location: 1008 Rock Creek Elementary School Dr, O Fallon, MO 63366 Phone: 636-281-4410 Fax: 636-281-4412
Neal Holzum, MD Infectious Disease Medicare: Accepting Medicare Assignments Practice Location: 2 Progress Point Ct, Ste 101a, O Fallon, MO 63368 Phone: 636-236-9945
Kent Alexander Neil Cassmeyer, MD Infectious Disease Medicare: Accepting Medicare Assignments Practice Location: 300 Winding Woods Dr Ste 214, O Fallon, MO 63366 Phone: 636-614-3289 Fax: 636-272-3680
Dr. Qaiser Jawaid, M.D. Infectious Disease Medicare: Accepting Medicare Assignments Practice Location: 20 Progress Point Pkwy Ste 206, O Fallon, MO 63368 Phone: 636-344-1073

David Alan Janssen, MD - Medicare Infectious Disease in O Fallon, MO