Margaret Fonseca
- Gender: Female
- Experience: 4 years
- Graduation year: 2017
- Sole propriator: No
- NPI: 1992362776
Margaret Fonseca NP
Hospitalist
She is located at 224 South Woods Mill Road Suite 580 in Chesterfield, MO 63017. Her National Provider Identifier (NPI) number is 1992362776. Appointment can be made via the phone number (314) 413-0096. She is affiliated with 1 hospitals.
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Margaret Fonseca as in-network for the following 2026 plans.
Health plans
Oscar Insurance Company
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 11 plans from Oscar Insurance Company
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Bronze Classic 4700 | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Bronze Classic Standard | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Bronze Elite + PCP Saver Plus | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Bronze Simple Diabetes | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Gold Classic Standard | EPO · Gold | Preferred | Accepting new patients |
| Gold Simple | EPO · Gold | Preferred | Accepting new patients |
| Silver Classic Standard | EPO · Silver | Preferred | Accepting new patients |
| Silver Elite Saver Plus | EPO · Silver | Preferred | Accepting new patients |
| Silver Simple Diabetes | EPO · Silver | Preferred | Accepting new patients |
| Silver Simple PCP Saver | EPO · Silver | Preferred | Accepting new patients |
| Silver Simple Women's Health with Menopause Benefits | 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 | Accepting new patients |
| UHC Bronze Essential (No Referrals) | EPO · Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Standard (No Referrals) | EPO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Standard+ (Dental + Vision, No Referrals) | EPO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Gold Advantage ($0 Virtual Urgent Care, No Referrals) | EPO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Advantage+ ($0 Virtual Urgent Care, Dental + Vision, No Referrals) | EPO · Gold | Non Preferred | 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 | Accepting new patients |
| UHC Gold Standard (No Referrals) | EPO · Gold | Non Preferred | Accepting new patients |
| UHC Silver Advantage ($0 Virtual Urgent Care, No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Advantage+ ($0 Virtual Urgent Care, Dental + Vision, No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Standard (No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Standard+ (Dental + Vision, No Referrals) | EPO · Silver | Non Preferred | 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 Margaret Fonseca 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
Margaret Fonseca is enrolled to bill Medicare as a Practitioner - Nurse Practitioner .
Bills through: Physician Specialists Of St Lukes Llc
Based on Medicare's public enrollment records as of Sep 29, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Studies
Graduated in 2017
Looking for more Hospitalists?
There are 7 other hospitalists in this region.
- Gender: Male
- Address: 14314 Manderleigh Woods Drive Chesterfield, 63017, MO
- Gender: Male
- Address: Suite 410S 224 South Woods Mill Road Chesterfield, 63017, MO
- Gender: Female
- Address: 44045 Riverside Parkway Leesburg, 20176, VA
- Gender: Female
- Address: 550 White Road Chesterfield, 63017, MO
- Gender: Female
- Address: 15740 South Outer 40 Road Chesterfield, 63017, MO
- Gender: Female
- Address: 13001 North Outer 40 Road Chesterfield, 63017, MO
- Gender: Male
- Address: Suite 330E 232 South Woods Mill Road Chesterfield, 63017, MO
Questions & Answers
Does Margaret Fonseca accept insurance?
Margaret Fonseca is listed in-network for 24 ACA Marketplace (Obamacare/HealthCare.gov) plans from Oscar Insurance Company, UnitedHealthcare. See the Marketplace plans section for details.
Where can you meet with Margaret Fonseca?
Margaret Fonseca's office is located at 224 South Woods Mill Road Suite 580 in Chesterfield, MO 63017.
Has Margaret Fonseca affiliation with hospitals?
Margaret Fonseca is affiliated with ST LUKES HOSPITAL.