Mary Brennan, MD
Pediatrics Physician · Valhalla, NY
Mary Brennan, MD is a pediatrics physician with a practice address in Valhalla, New York, and NPI 1033565668, issued on May 12, 2016. Check the license (New York 300557, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Mary Brennan
- Credential
- MD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- 300557 NY
Self-reported in NPPES; status is on the state search - Practice location
- 100 Woods RD, Valhalla, NY 10595
- Phone
- (914) 493-7000
- Enumerated
- May 12, 2016
- Record last updated
- Aug 29, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20191003001161); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 5,795 in New York → Look up another NPI →
Also registered at 100 Woods RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marie Abate, PA-CPhysician Assistant1285225524
- Shaimaa AbdallahStudent in an Organized Health Care Education/Training Program1215616321
- Omar Abdelkader, MDStudent in an Organized Health Care Education/Training Program1790571099
- Magdi Abdelrahman, MBBSStudent in an Organized Health Care Education/Training Program1669925178
- Ruba Abdul WahedStudent in an Organized Health Care Education/Training Program1821626011
- Ammar AbdulfattahStudent in an Organized Health Care Education/Training Program1982345740
Verify Mary Brennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 300557Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Boston Children's Health Physicians LLPValhalla, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Brennan among 5,795 pediatrics physician records in New York
Mary Brennan, MD is one of 5,795 pediatrics physician records with a practice address in New York. 36% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 82% of them.
- NPI issued2016 · 82% of these records are older, 16% newer
- In a Medicare fileYes · 36% of these records are
- In the CMS Doctors and Clinicians fileYes · 8% of these records are
- Graduated2016 · median 2008 among the 451 with a school on file
- Record last updated2019 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
38 pediatrics physician records list a practice address in Valhalla
They are 38 of the 2,105 NPPES records with a practice address in Valhalla, and 5,795 pediatrics physician records in New York.
All 5,795 in New York → Every provider in Valhalla → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- David Ashe, MDValhalla, NY 105951710060413
- Jennifer Canter, M.D., M.P.H.Valhalla, NY 105951174672430
- Ying Chuu, M.D.Valhalla, NY 105951215021654
- Karen Edwards, MD MPHValhalla, NY 105951437291184
- Claire Elpenord, MDValhalla, NY 105951114211349
- Byron Fernandez, MD.Valhalla, NY 105951598873309
- Carey Goltzman, MDValhalla, NY 105951790786770
- Sabrina Malik, MDValhalla, NY 105951689810558
Common questions
What is Mary Brennan, MD's NPI number?
Mary Brennan, MD's National Provider Identifier (NPI) is 1033565668, issued on May 12, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Mary Brennan, MD located?
The NPPES record lists a practice address at 100 Woods RD, Valhalla, NY, 10595. Phone: (914) 493-7000. Providers update this record themselves, so call before visiting.
How can I verify Mary Brennan, MD's license?
NPPES lists New York license number 300557, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.