Dr. Margaretta L. Mendenhall
- Gender: Female
- Experience: 14 years
- Graduated from: Saint Louis University School Of Medicine
- Graduation year: 2007
- Sole propriator: No
- NPI: 1275730111
Dr. Margaretta L. Mendenhall M.D.
Obstetrician and Gynecologist
She is located at 300 Winding Woods Drive Suite 200 in O Fallon, MO 63366. Can help patients with the following: Bacterial Vaginosis, High Blood Pressure, Placenta Previa, Polycystic Ovary Syndrome (PCOS), Vaginal Atrophy and Dryness, Vaginal Pain. Her National Provider Identifier (NPI) number is 1275730111. Appointment can be made via the phone number (636) 240-0130. She is affiliated with 1 practices and 1 hospitals.
Conditions treated
Dr. Margaretta Lynn Mendenhall, being an obstetrician and gynecologist, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. Margaretta L. Mendenhall.
- Amenorrhea
- Bacterial Vaginosis
- Birth Control Counseling
- Blood in Urine
- Braxton Hicks Contractions
- Breast Cancer
- Breastfeeding
- Breastfeeding and Lactation
- Cancer
- Cervical Cancer
- Cervical Intraepithelial Neoplasia (CIN)
- Chlamydia
- Ectopic Pregnancy
- Endometriosis
- Fibrocystic Breast Disease
- Gestational Diabetes
- Group B Streptococcal Infection (GBS)
- Gynecological Exam
- High Blood Pressure
- Hot Flashes
- Human Papillomavirus (HPV)
- Infertility
- Labor and Birth
- Menopause
- Menstrual Cramps
- Miscarriage
- Morning Sickness
- Osteoporosis
- Ovarian Cancer
- Ovarian Cysts
- Overactive Bladder (OAB)
- Pelvic Inflammatory Disease (PID)
- Pelvic Pain
- Perimenopause
- Placenta Previa
- Polycystic Ovary Syndrome (PCOS)
- Preeclampsia and Eclampsia
- Pregnancy
- Premature Ovarian Failure (POF)
- Premenstrual Dysphoric Disorder (PMDD)
- Premenstrual Syndrome (PMS)
- Prenatal Care
- Sexually Transmitted Diseases (STDs)
- Trichomoniasis
- Urinary Incontinence (UI)
- Urinary Retention
- Urinary Tract Infection (UTI)
- Uterine Cancer
- Uterine Fibroids
- Uterine Growths
- VBAC
- Vaginal Atrophy and Dryness
- Vaginal Bleeding
- Vaginal Cancer
- Vaginal Pain
- Vaginitis
- Women's Health
- Yeast Infection
Procedures Performed by Dr. Margaretta L. Mendenhall
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. Margaretta L. Mendenhall as in-network for the following 2026 plans.
Health plans
Ambetter Health
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 16 plans from Ambetter Health
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Complete Gold | EPO · Gold | Preferred | Accepting new patients |
| Complete Gold + Vision + Adult Dental | EPO · Gold | Preferred | Accepting new patients |
| Complete Silver | EPO · Silver | Preferred | Accepting new patients |
| Complete Silver + Vision + Adult Dental | EPO · Silver | Preferred | Accepting new patients |
| Elite Bronze | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Elite Bronze + Vision + Adult Dental | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Everyday Bronze | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Everyday Bronze + Vision + Adult Dental | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Everyday Gold | EPO · Gold | Preferred | Accepting new patients |
| Everyday Gold + Vision + Adult Dental | EPO · Gold | Preferred | Accepting new patients |
| Standard Expanded Bronze | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Standard Expanded Bronze + Vision + Adult Dental | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Standard Gold | EPO · Gold | Preferred | Accepting new patients |
| Standard Gold + Vision + Adult Dental | EPO · Gold | Preferred | Accepting new patients |
| Standard Silver | EPO · Silver | Preferred | Accepting new patients |
| Standard Silver + Vision + Adult Dental | EPO · Silver | Preferred | Accepting new patients |
Anthem Blue Cross and Blue Shield
Network data as of Mar 26, 2026, as reported by the insurer.
Show all 10 plans from Anthem Blue Cross and Blue Shield
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Anthem Bronze Pathway 10150 ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Bronze | Participating | Accepting new patients at some locations |
| Anthem Bronze Pathway 6900 ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Expanded Bronze | Participating | Accepting new patients at some locations |
| Anthem Bronze Pathway 7500 Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Expanded Bronze | Participating | Accepting new patients at some locations |
| Anthem Catastrophic Pathway (+ Incentives) | EPO · Catastrophic | Participating | Accepting new patients at some locations |
| Anthem Gold Pathway 2000 Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Gold | Participating | Accepting new patients at some locations |
| Anthem Heart Healthy Bronze Pathway 4900 ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Expanded Bronze | Participating | Accepting new patients at some locations |
| Anthem Heart Healthy Silver Pathway 3100 ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Silver | Participating | Accepting new patients at some locations |
| Anthem Silver Pathway 5350 ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Silver | Participating | Accepting new patients at some locations |
| Anthem Silver Pathway 6000 Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Silver | Participating | Accepting new patients at some locations |
| Anthem Silver Pathway 7200 ($0 Virtual PCP + $0 Select Drugs + Incentives) | EPO · Silver | Participating | Accepting new patients at some locations |
Medica
Network data as of Jul 13, 2026, as reported by the insurer.
Show all 9 plans from Medica
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Balance by Medica Bronze $0 Copay PCP Visits | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Balance by Medica Bronze Premier | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Balance by Medica Expanded Bronze Standard | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Balance by Medica Gold $0 Copay PCP Visits | EPO · Gold | Preferred | Accepting new patients |
| Balance by Medica Gold Share | EPO · Gold | Preferred | Accepting new patients |
| Balance by Medica Gold Standard | EPO · Gold | Preferred | Accepting new patients |
| Balance by Medica Silver $0 Copay PCP Visits | EPO · Silver | Preferred | Accepting new patients |
| Balance by Medica Silver Share | EPO · Silver | Preferred | Accepting new patients |
| Balance by Medica Silver Standard | EPO · Silver | Preferred | Accepting new patients |
UnitedHealthcare
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 13 plans from UnitedHealthcare
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| UHC Bronze Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, No Referrals) | EPO · Expanded Bronze | Non Preferred | Not accepting new patients |
| UHC Bronze Essential (No Referrals) | EPO · Bronze | Non Preferred | Not accepting new patients |
| UHC Bronze Standard (No Referrals) | EPO · Expanded Bronze | Non Preferred | Not accepting new patients |
| UHC Bronze Standard+ (Dental + Vision, No Referrals) | EPO · Expanded Bronze | Non Preferred | Not accepting new patients |
| UHC Gold Advantage ($0 Virtual Urgent Care, No Referrals) | EPO · Gold | Non Preferred | Not accepting new patients |
| UHC Gold Advantage+ ($0 Virtual Urgent Care, Dental + Vision, No Referrals) | EPO · Gold | Non Preferred | Not accepting new patients |
| UHC Gold Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, $8 Tier 2 Rx, No Referrals) | EPO · Gold | Non Preferred | Not accepting new patients |
| UHC Gold Standard (No Referrals) | EPO · Gold | Non Preferred | Not accepting new patients |
| UHC Silver Advantage ($0 Virtual Urgent Care, No Referrals) | EPO · Silver | Non Preferred | Not accepting new patients |
| UHC Silver Advantage+ ($0 Virtual Urgent Care, Dental + Vision, No Referrals) | EPO · Silver | Non Preferred | Not accepting new patients |
| UHC Silver Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, No Referrals) | EPO · Silver | Non Preferred | Not accepting new patients |
| UHC Silver Standard (No Referrals) | EPO · Silver | Non Preferred | Not accepting new patients |
| UHC Silver Standard+ (Dental + Vision, No Referrals) | EPO · Silver | Non Preferred | Not accepting new patients |
This covers ACA Marketplace plans only, as reported by each insurer. It does not include employer, Medicare Advantage, or state-run exchange plans, and a plan missing from this list does not mean Dr. Margaretta L. Mendenhall is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Medicare Enrollment
Dr. Margaretta L. Mendenhall is enrolled to bill Medicare as a Practitioner - Obstetrics/gynecology .
Bills through: Mercy Hospitals East Communities
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Payments received
Drug payment
| Merck | $49 |
| Hologic | $25 |
| Otsuka Pharmaceutical | $13 |
Other
| Food and Beverage | $111 |
Studies
SAINT LOUIS UNIVERSITY SCHOOL OF MEDICINE
Graduated in 2007
Looking for more Obstetrician and Gynecologists?
There are 7 other obstetrician and gynecologists in this region.
- Gender: Female
- Address: 1101 Highway K O Fallon, 63366, MO
- Gender: Female
- Address: Suite 200 300 Winding Woods Drive O Fallon, 63366, MO
- Gender: Male
- Address: 1101 Highway K O Fallon, 63366, MO
- Gender: Male
- Address: 18800 Schnucks Drive Suite B Warrenton, 63383, MO
- Gender: Female
- Address: 1101 Highway K O Fallon, 63366, MO
- Gender: Female
- Address: 1101 State Highway K O Fallon, 63366, MO
- Gender: Female
- Address: Suite 200 300 Winding Woods Drive O'Fallon, 63366, MO
Questions & Answers
Does Dr. Margaretta Lynn Mendenhall have affiliation with practices?
Dr. Margaretta Lynn Mendenhall is affiliated with St. John's Mercy Support Services.
Does Dr. Margaretta Lynn Mendenhall accept patients with Anthem Blue Cross and Blue Shield?
Yes, Dr. Margaretta Lynn Mendenhall is listed in-network for Anthem Blue Cross and Blue Shield through the ACA Marketplace (Obamacare/HealthCare.gov). See the Marketplace plans section for details.
Has Dr. Margaretta Lynn Mendenhall affiliation with hospitals?
Dr. Margaretta Lynn Mendenhall is affiliated with MERCY HOSPITAL ST LOUIS.
Where can you meet with Dr. Margaretta Lynn Mendenhall?
Dr. Margaretta Lynn Mendenhall's office is located at 300 Winding Woods Drive Suite 200 in O Fallon, MO 63366.
What conditions does Dr. Margaretta Lynn Mendenhall treat?
Dr. Margaretta Lynn Mendenhall provides treatment for Bacterial Vaginosis, High Blood Pressure, Placenta Previa, Polycystic Ovary Syndrome (PCOS), Vaginal Atrophy and Dryness, Vaginal Pain. For the full list see this list.