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DR. MARGARETTA LYNN MENDENHALL M.D.
NPI 1275730111
Obstetrics & Gynecology in O Fallon, MO

Active since July 02, 2007PECOS EnrolledAccepts Medicare Assignment
300 WINDING WOODS DR, SUITE 200, O FALLON, MO 63366(636) 240-0130(636) 240-6822 Get Directions Write a Review

NPPES record last updated: March 11, 2014. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Margaretta Lynn Mendenhall M.d. NPPES

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

DR. MARGARETTA LYNN MENDENHALL M.D. (NPI 1275730111) is an individual obstetrics & gynecology provider in O Fallon, Missouri, licensed in Missouri (2011009917) and active in the NPI registry since July 2007. She is enrolled in Medicare PECOS, is affiliated with Mercy Hospital St Louis, and is a graduate of Saint Louis University School Of Medicine (2007).

NPPES Registry Identity

NPI1275730111
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameDR. MARGARETTA LYNN MENDENHALLCredential: M.D.
Location Address300 WINDING WOODS DR, SUITE 200O Fallon, MO 63366-4771
Mailing Address21 Roclare LnSaint Louis, MO 63131-1100 · (314) 517-0178
Phone(636) 240-0130
Fax(636) 240-6822
Sole ProprietorNo
Medical School CMSSaint Louis University School Of MedicineGraduated 2007
Enumeration DateJuly 2, 2007
Last NPPES UpdateMarch 11, 2014
✔ NPI 1275730111 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in MO · 2011009917
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
300 WINDING WOODS DR, O Fallon, MO 63366
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health, Ambetter from Sunflower Health Plan and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Margaretta Lynn Mendenhall M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2668644022
PECOS Enrollment IDI20111006000313
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101
This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.
21 services21 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
14 services14 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mercy Hospital St Louis

Acute Care Hospitals · Saint Louis, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260020
Location615 New Ballas RoadSaint Louis, MO 63141 · St. Louis County
Emergency services Birthing friendly

Mercy Hospital South

Acute Care Hospitals · Saint Louis, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260077
Location10010 Kennerly RoadSaint Louis, MO 63128 · St. Louis County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63366 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
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
Established Patient
$69.50 typical visit price
range $17.76 – $137.92
Typical copayment $17.37 (range $4.44 – $34.48)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. LEAH ROSE GLASS D.O.
Obstetrics & Gynecology
300 WINDING WOODS DR, SUITE 200
O FALLON, MO 63366
St. Charles County (636) 240-0130
DR. JULIE ELIZABETH STEWART DPM
Podiatrist (Foot & Ankle Surgery)
300 WINDING WOODS DR, SUITE214
O FALLON, MO 63366
St. Charles County (636) 281-1705
DDK, LC
Podiatrist
300 WINDING WOODS DR, SUITE 214
O FALLON, MO 63366
St. Charles County (636) 281-8393
MS. SONDRA L MCCLANAHAN FNP
Nurse Practitioner (Family)
300 WINDING WOODS DR, SUITE 222
O FALLON, MO 63366
St. Charles County (636) 978-8600
ST. JOHN'S MERCY SUPPORT SERVICES
Obstetrics & Gynecology (Maternal & Fetal Medicine)
300 WINDING WOODS DR, SUITE 112
O FALLON, MO 63366
St. Charles County (636) 379-6600
DR. ALYSSA LEIGH KELLER M.D.
Family Medicine
300 WINDING WOODS DR, SUITE 222
O FALLON, MO 63366
St. Charles County (636) 978-8600
LOUIS GAEFKE DPM
Podiatrist
300 WINDING WOODS DR, STE 214
OFALLON, MO 63366
St. Charles County (636) 281-8393
DDK, LLC
Podiatrist
300 WINDING WOODS DR, SUITE 214
O FALLON, MO 63366
St. Charles County (636) 281-8393

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 Margaretta Mendenhall's NPI number?

The NPI number for Margaretta Mendenhall is 1275730111. It was assigned to this individual provider in the NPPES registry on July 2, 2007.

Where is Margaretta Mendenhall located?

Margaretta Mendenhall practices at 300 Winding Woods Dr Suite 200, O Fallon, MO 63366. The listed phone number is (636) 240-0130.

What is Margaretta Mendenhall's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Margaretta Mendenhall enrolled in Medicare?

Yes. Margaretta Mendenhall is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Margaretta Mendenhall accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health and Ambetter from Sunflower Health Plan and 5 other insurers list Margaretta Mendenhall as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Margaretta Mendenhall affiliated with any hospitals?

According to CMS data, Margaretta Mendenhall is affiliated with Mercy Hospital St Louis and Mercy Hospital South.

When was this NPI record last updated?

The NPPES record for Margaretta Mendenhall was last updated on March 11, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.