Dr. Ellen M. Nicastro
- Gender: Female
- Sole propriator: No
- NPI: 1861604423
Dr. Ellen M. Nicastro M.D.
Pediatrician
She is located at 845 North New Ballas Court Ste 205 in Saint Louis, MO 63141. Can help patients with the following: Anencephaly, Asthma, Birth Defects, Edwards Syndrome, Enuresis, General Care. Her National Provider Identifier (NPI) number is 1861604423. Appointment can be made via the phone number (314) 859-4460. She is affiliated with 1 practices.
Conditions treated
Dr. Ellen Margaret Nicastro, being an pediatrician, 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. Ellen M. Nicastro.
- Abdominal Pain
- Allergic Reaction
- Anemia
- Anencephaly
- Asthma
- Autism
- Bee and Wasp Stings
- Birth Defects
- Bronchitis
- Cerebral Palsy (CP)
- Childhood Behavioral and Emotional Disorders
- Childhood Obesity
- Chronic Cough
- Cleft Palate and Cleft Lip
- Colic
- Common Cold
- Croup
- Developmental Delays
- Down Syndrome
- Dyslexia
- Eczema
- Edwards Syndrome
- Enuresis
- Fetal Alcohol Syndrome (FAS)
- Fever
- Food Poisoning
- Fragile X Syndrome (FXS)
- General Care
- Hay Fever
- Head Lice
- Headache
- Hives
- Infant Care
- Influenza
- Jaundice
- Kawasaki Disease
- Learning Disability
- Migraine
- Muscular Dystrophy
- Nausea and Vomiting
- Noonan Syndrome
- Parenting
- Pervasive Developmental Disorders (PDD)
- Phenylketonuria (PKU)
- Pinworm Infection
- Prescription Refill
- Reye Syndrome
- Rickets
- Sinusitis
- Skin Rash
- Sore Throat
- Speech Disorders
- Stuttering
- Sudden Infant Death Syndrome (SIDS)
- Tourette Syndrome
- Turner Syndrome
- Upper Respiratory Infection (URI)
- Urinary Tract Infection (UTI)
- Williams Syndrome
- Wilson-Turner Syndrome
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. Ellen M. Nicastro as in-network for the following 2026 plans.
Health plans
Cox HealthPlans
Network data as of Sep 11, 2026, as reported by the insurer.
Show all 7 plans from Cox HealthPlans
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Cox HealthPlans Bronze Expanded Standard | EPO · Expanded Bronze | EPO | Accepting new patients |
| Cox HealthPlans Bronze Preferred | EPO · Bronze | EPO | Accepting new patients |
| Cox HealthPlans Gold Preferred | EPO · Gold | EPO | Accepting new patients |
| Cox HealthPlans Gold Standard | EPO · Gold | EPO | Accepting new patients |
| Cox HealthPlans Silver Connect | EPO · Silver | EPO | Accepting new patients |
| Cox HealthPlans Silver Preferred | EPO · Silver | EPO | Accepting new patients |
| Cox HealthPlans Silver Standard | EPO · Silver | EPO | 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 Dr. Ellen M. Nicastro 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. Ellen M. Nicastro is enrolled to bill Medicare as a Practitioner - Pediatric Medicine .
Bills through: Mercy Clinic 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.
Looking for more Pediatricians?
Out of the 73 pediatricians in this region, here are 10 randomly selected ones for you to explore.
- Gender: Female
- Address: Suite: 6006-B 621 South New Ballas Road Saint Louis, 63141, MO
- Gender: Male
- Address: Children's Hospital, Ground Floor, Suite Yg220 615 South New Ballas Road Saint Louis, 63141, MO
- Gender: Male
- Address: 615 South New Ballas Road St. Louis, 63141, MO
- Gender: Female
- Address: Div Ped Genetics And Genomic Med 1 Childrens Place Saint Louis, 63110, MO
- Gender: Male
- Address: Suite 107-W 777 South New Ballas Road Saint Louis, 63141, MO
- Gender: Male
- Address: Suite 206 522 North New Ballas Road St. Louis, 63141, MO
- Gender: Female
- Address: 621 South New Ballas Road Suite 6009B Saint Louis, 63141, MO
- Gender: Male
- Address: 615 South New Ballas Road Floor Y-G230 Saint Louis, 63141, MO
- Gender: Male
- Address: 621 South New Ballas Road Suite 63B Saint Louis, 63141, MO
- Gender: Female
- Address: Ste 205 845 North New Ballas Court Saint Louis, 63141, MO
Questions & Answers
What conditions does Dr. Ellen Margaret Nicastro treat?
Dr. Ellen Margaret Nicastro provides treatment for Anencephaly, Asthma, Birth Defects, Edwards Syndrome, Enuresis, General Care. For the full list see this list.
Where can you meet with Dr. Ellen Margaret Nicastro?
Dr. Ellen Margaret Nicastro's office is located at 845 North New Ballas Court Ste 205 in Saint Louis, MO 63141.
Does Dr. Ellen Margaret Nicastro have affiliation with practices?
Dr. Ellen Margaret Nicastro is affiliated with Mercy Clinic Children's Hospitalists - St. Louis.
Does Dr. Ellen Margaret Nicastro accept insurance?
Dr. Ellen Margaret Nicastro is listed in-network for 20 ACA Marketplace (Obamacare/HealthCare.gov) plans from Cox HealthPlans, UnitedHealthcare. See the Marketplace plans section for details.