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Family Medicine Providers in O Fallon, MO

Browse 36 Family Medicine providers listed in NPPES with a practice address in O Fallon, Missouri.

36 Healthcare Providers

How O Fallon compares with the U.S.

O Fallon has 38 clinicians in Family Medicine per 100,000 residents, 18% lower than the U.S. rate of 47.

That is 36 active clinicians in Family Medicine with a practice address in O Fallon, for a population of 93,801.

The Missouri rate is 49 per 100,000 residents.

What these numbers mean

Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.

A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.

City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places.

91% of clinicians in Family Medicine in O Fallon listed in the CMS Medicare file (20 of 22) accept Medicare assignment. That is lower than the Missouri share of 97%.

What is Medicare assignment?

A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.

Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.

55% of clinicians in Family Medicine in O Fallon listed in the CMS Medicare file (12 of 22) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than the Missouri share of 25%.

About the telehealth indicator

The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.

These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.

Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@t-medinfo.com ยท Methodology

Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of November 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

Family Medicine Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Family Medicine practitioners in O Fallon, MO

Source: CMS PECOS
PECOS Enrolled Specialists 25 In O Fallon, MO
Part B Lab & Imaging Eligible 28 Diagnostic Referrals
DME Ordering Eligible 28 Durable Medical Equipment
Home Health Agency Referrals 28 HHA Ordering Eligible
Showing 1โ€“20 of 36 providers
With recent CMS data first, then Aโ€“Z

Dr. Alison Juliete Ball , DO

Family Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
2223 Technology Dr, Suite 40, O Fallon, MO 633687272
Phone: 6367554400
NPI Identifier 1427345263
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Dr. Alissa Ballard , DO

Family Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
2630 State Highway K, Ste 100, O'fallon, MO 63368
Phone: 6362405454
NPI Identifier 1508359100
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Dr. Mckayla M Dinwiddie , MD

Family Medicine

Active NPI Status
2299 Technology Dr Ste 320, O Fallon, MO 633687341
Phone: 6366950535
NPI Identifier 1194429290
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Dr. Michael E Engel , MD

Family Medicine

Active NPI Status
1000 Technology Drive, O'fallon, MO 63368
Phone: 6362611600
NPI Identifier 1861431983
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Dr. Emma Marie Gloe , MD

Family Medicine

Active NPI Status
2299 Technology Dr Ste 320, O Fallon, MO 633687341
Phone: 6366950535
NPI Identifier 1467148361
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Dr. Amanda Heidemann , MD

Family Medicine

Active NPI Status
2630 Highway K, O Fallon, MO 633686624
Phone: 6369805300
NPI Identifier 1043329105
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Dr. Michael P Hemmersmeier , DO

Family Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1101 Highway K, O Fallon, MO 633668431
Phone: 6363794590
NPI Identifier 1366404832
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Dr. Leonard M Hoffmann , MD

Family Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1101 Highway K, O Fallon, MO 633668431
Phone: 6363794590
NPI Identifier 1174585665
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Dr. Emily Rebecca Hutchinson , DO

Family Medicine

Active NPI Status Accepts Medicare Assignment
20 Progress Point Pkwy Ste 108, O Fallon, MO 633682207
Phone: 6363442400
NPI Identifier 1235876863
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Marium Iqbal

Family Medicine

Active NPI Status Accepts Medicare Assignment
301 Caledonia Pkwy Ste 150, O Fallon, MO 633686690
Phone: 6362026802
NPI Identifier 1215679782
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Dr. Sarah Marie Jackson , DO

Family Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
300 Winding Woods Dr Ste 120, O Fallon, MO 633664772
Phone: 6366143280
NPI Identifier 1134858392
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Dr. Alyssa Leigh Keller , MD

Family Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
300 Winding Woods Dr, Suite 222, O Fallon, MO 633664771
Phone: 6369788600
NPI Identifier 1588892665
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Dr. Wan In L Koo , DO

Family Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1101 Highway K, O Fallon, MO 633668431
Phone: 6363798138
NPI Identifier 1871554865
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Dr. Jyoti G Kulkarni , MD

Family Medicine

Active NPI Status Accepts Medicare Assignment
2630 Highway K, O Fallon, MO 633686624
Phone: 6362405454
NPI Identifier 1649281668
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Dr. Amy Colleen Mcclintock , MD

Family Medicine

Active NPI Status
3449 Pheasant Meadow Dr Ste 107, O Fallon, MO 633687364
Phone: 5732712927
NPI Identifier 1073809141
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Sean A Mcintosh

Family Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
20 Progress Point Pkwy, Ste 108, O Fallon, MO 633682206
Phone: 6363442400
NPI Identifier 1700997731
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Dr. Timothy D Moore , DO

Family Medicine

Active NPI Status Accepts Medicare Assignment
2630 Highway K, O Fallon, MO 633686624
Phone: 6362405454
NPI Identifier 1396762910
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Dr. Maryam Naemi , DO

Family Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1101 Highway K, O Fallon, MO 633668431
Phone: 6363794590
NPI Identifier 1619938628
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Dr. John J. O'brien , MD

Family Medicine

Active NPI Status
2630 Highway K, O Fallon, MO 633686624
Phone: 6362405454
NPI Identifier 1083689061
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Dr. Caitlin Sue Rogers , DO

Family Medicine

Active NPI Status Accepts Medicare Assignment
20 Progress Point Pkwy Ste 108, O Fallon, MO 63368
Phone: 6363442400
NPI Identifier 1861873077
View Full Profile

Frequently Asked Questions about Family Medicine in O Fallon

How do I check a Family Medicine practitioner's license?

Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the Missouri licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.

Why is a practitioner missing from this list?

This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.