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DR. MICHAEL L WILLIAMS D.O.
NPI 1851353247
Family Medicine in O'fallon, MO

Active since April 03, 2006Opted out of Medicare · through Nov 17, 2026
ULTRA WELLNESS MEDICAL, LLC, 3026 WINGHAVEN BLVD., O'FALLON, MO 63368(636) 333-9820(636) 228-0039 Get Directions Write a Review

NPPES record last updated: September 23, 2022. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Sep 23, 2022, Oct 28, 2020, Nov 14, 2018 (3 updates tracked since 2018).

About Dr. Michael L Williams D.o. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MICHAEL L WILLIAMS D.O. (NPI 1851353247) is an individual family medicine provider in O'fallon, Missouri, licensed in Illinois (2005036219) and active in the NPI registry since April 2006. He has opted out of Medicare through November 17, 2026 and remains eligible to order and refer and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1851353247
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. MICHAEL L WILLIAMSCredential: D.O.
Location AddressULTRA WELLNESS MEDICAL, LLC, 3026 WINGHAVEN BLVD.O'fallon, MO 63368
Mailing Address3026 Winghaven Blvd.O'fallon, MO 63368 · (636) 333-9820 · Fax (636) 228-0039
Phone(636) 333-9820
Fax(636) 228-0039
Sole ProprietorYes
Enumeration DateApril 3, 2006
Last NPPES UpdateSeptember 23, 20223 updates tracked since enumeration
NPPES CertifiedSeptember 20, 2022
✔ NPI 1851353247 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
Licenses✔ Licensed in IL · 2005036219✔ Licensed in CA · 20A18065
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
ULTRA WELLNESS MEDICAL, LLC, O'fallon, MO 63368
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1400 Medical Plz Ste 200Lake St Louis, MO 63367-1417 · Phone (636) 625-2662
Location 27421 Highway NDardenne Prairie, MO 63368-7014 · Phone (636) 561-5699 · Fax (636) 669-2401

Other Identifiers 1

Medicaid200202505MO

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Michael L Williams D.o. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from November 17, 2022 through November 17, 2026.

Opt-Out Effective DateNovember 17, 2022
Opt-Out In Effect ThroughNovember 17, 2026Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63368 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$86.32 typical visit price
range $55.65 – $169.38
Typical copayment $21.58 (range $13.91 – $42.34)
Most-billed visit code 99203
Established Patient
$98.37 typical visit price
range $17.76 – $137.92
Typical copayment $24.59 (range $4.44 – $34.48)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Michael Williams's NPI number?

The NPI number for Michael Williams is 1851353247. It was assigned to this individual provider in the NPPES registry on April 3, 2006.

Where is Michael Williams located?

Michael Williams practices at Ultra Wellness Medical, LLC 3026 Winghaven Blvd., O'fallon, MO 63368. The listed phone number is (636) 333-9820.

What is Michael Williams's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Michael Williams enrolled in Medicare?

No. Michael Williams has opted out of Medicare through November 17, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Michael Williams was last updated on September 23, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.