Dr. Maria S. Horenstein, MD
- Hospital affiliations
- 1
- Industry payments
- $193
- Medical groups
- 2
- Insurance carriers
- 8
- State licenses
- 4
- Practice address
- 1201 W La Veta Ave, Orange, CA 92868
- Practice phone
- Call (714) 997-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Children's Hospital of Orange County Main Campus
Orange, California
Find Dr. Horenstein's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Maria S. Horenstein is a pediatric cardiology physician in Orange, California
Dr. Horenstein practices at Children's Hospital of Orange County Main Campus in Orange, California.
Dr. Horenstein's NPI, 1760626352, was assigned on April 27, 2009. Dr. Horenstein graduated from National University of Cuyo School of Medicine in 1994. Dr. Horenstein's California license number on file is A87618.
- NPI
- 1760626352NPI Registry (opens in a new tab)
- NPI enumeration date
- April 27, 2009
- NPI status
- Active
- Practice phone
- (714) 997-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Maria S. Horenstein practices at Children's Hospital of Orange County Main Campus in Orange, California
Dr. Horenstein's primary practice is Children's Hospital of Orange County Main Campus, at 1201 W La Veta Ave, Orange, CA 92868 in Orange County. The practice phone is (714) 997-3000.
- Children's Hospital of Orange County Main Campus1201 W La Veta Ave, Orange, CA 92868 · Orange CountyPhone(714) 997-3000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Maria S. Horenstein is affiliated with 2 sites of care and 2 medical groups
Dr. Horenstein's primary practice is Children's Hospital of Orange County Main Campus in Orange, California. Dr. Horenstein is also affiliated with Rady Children's Hospital - Orange County. The medical group on file is CHOC Children's. Dmand AI also links Dr. Horenstein to 1 more medical group, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Maria S. Horenstein's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Horenstein practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Children's Hospital of Orange County Main Campus | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Maria S. Horenstein is one of 331 pediatric cardiology physicians in California
Pediatric cardiology is Dr. Horenstein's primary specialty in the NPI Registry, under taxonomy code 2080P0202X. Dr. Horenstein is board certified in pediatric cardiology by the American Board of Pediatrics. Dmand AI has Dr. Horenstein's licenses on file in 4 states: California, Texas, Michigan and North Carolina.
Specialties and state licenses
- Pediatric cardiology, CaliforniaPrimary
- Texas license
- Michigan license
- North Carolina license
Pediatric cardiology physicians near Dr. Horenstein
Counts of pediatric cardiology physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Maria S. Horenstein's patients have a median age of 16
Across all payers, Dmand AI patient panel data puts Dr. Horenstein's median patient age at 16, with 46% women.
Dr. Horenstein's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 16
Patient panel by sex, all payers
- Women46%
- Men53%
Source: Dmand AI Patient Panel Data
Dr. Maria S. Horenstein received $193 in industry payments from 2022 to 2025
CMS Open Payments shows 10 general payments to Dr. Horenstein from 2 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 100% of the total. Medtronic, Inc. paid the most, $159.
General payments to Dr. Horenstein by program year, 2022 to 2025
Companies that paid Dr. Horenstein the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Maria S. Horenstein graduated from National University of Cuyo School of Medicine
Dr. Horenstein graduated from National University of Cuyo School of Medicine in 1994.
- Medical school
- Board certified in pediatric cardiology
Source: Dmand AI Professional Profile Data
Dr. Maria S. Horenstein accepts plans from 8 insurance carriers
Dr. Horenstein is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- LA Care
- Molina
- Regence Health Plans
- NV State Medicaid
Plan types Dr. Horenstein accepts, by number of carriers
- Medicare6
- PPO5
- HMO4
- Medicaid2
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Maria S. Horenstein's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Maria S. Horenstein
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Maria S. Horenstein's NPI number?
Dr. Maria S. Horenstein's NPI number is 1760626352. It was assigned on April 27, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Maria S. Horenstein?
Dr. Maria S. Horenstein is a pediatric cardiology physician in Orange, California. The primary specialty in the NPI Registry is Pediatric Cardiology Physician (taxonomy code 2080P0202X).
Where does Dr. Maria S. Horenstein practice?
Dr. Horenstein practices at 1201 W La Veta Ave, Orange, CA 92868. Dr. Horenstein's primary practice is Children's Hospital of Orange County Main Campus in Orange, California. Dmand AI also links Dr. Horenstein to 1 medical group.
What is Dr. Maria S. Horenstein's office phone number?
The practice phone on file for Dr. Horenstein is (714) 997-3000.
What is Dr. Maria S. Horenstein's medical license number?
Dr. Horenstein's California license number on file is A87618, one of the licenses on file in 4 states.
Which states has Dr. Maria S. Horenstein been licensed in?
Dmand AI has state licenses on file for Dr. Horenstein in California (2004 to 2025), Texas (2008 to 2024), Michigan (1999 to 2006) and North Carolina (2002 to 2004).
Which hospitals is Dr. Maria S. Horenstein affiliated with?
Dr. Horenstein is affiliated with Rady Children's Hospital - Orange County.
What medical group is Dr. Maria S. Horenstein part of?
Dr. Horenstein is linked to CHOC Children's. Dmand AI links Dr. Horenstein to 1 more medical group.
Is Dr. Maria S. Horenstein board certified?
Yes. Dr. Horenstein is board certified in pediatric cardiology by the American Board of Pediatrics.
Where did Dr. Maria S. Horenstein go to medical school?
Dr. Horenstein graduated from National University of Cuyo School of Medicine in 1994.
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Has Dr. Maria S. Horenstein received payments from drug or device companies?
CMS Open Payments shows $193 in general payments to Dr. Horenstein from 2 companies from 2022 to 2025. The largest total came from Medtronic, Inc.
How long has Dr. Maria S. Horenstein been practicing?
Dr. Horenstein graduated from medical school in 1994, 32 years ago.
What insurance does Dr. Maria S. Horenstein accept?
Dr. Horenstein is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
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