Margaret R. Hammerschlag, M.D.
Pediatric Infectious Diseases Physician · Brooklyn, NY
Margaret R. Hammerschlag, M.D. is a pediatric infectious diseases physician with a practice address in Brooklyn, New York, and NPI 1629053103, issued on Dec 7, 2005. Check the license (New York 141472-1, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Margaret R. Hammerschlag
- Credential
- M.D.
- Primary taxonomy
- Pediatric Infectious Diseases Physician 2080P0208X
- License number
- 141472-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 450 Clarkson Ave, Brooklyn, NY 11203
- Phone
- (718) 270-4714
- Enumerated
- Dec 7, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (718) 270-1985
- Medicaid ID
- 00695767 NY
- Entity
- Type 1 · individual
Also registered at 450 Clarkson Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sana Abbas, DOStudent in an Organized Health Care Education/Training Program1629863212
- Rabab Abdalla, MDStudent in an Organized Health Care Education/Training Program1780325621
- Marie Abdallah, MDStudent in an Organized Health Care Education/Training Program1073743639
- Ahmed AbdelfattahStudent in an Organized Health Care Education/Training Program1508708959
- Haram AbdelmajidStudent in an Organized Health Care Education/Training Program1093348054
- Sara AbdelrahamanStudent in an Organized Health Care Education/Training Program1659143568
Verify Margaret R. Hammerschlag 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 141472-1Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $14,069.78
20 payments; by number, the most common kind was travel and lodging; the largest payer was Abbott Laboratories. The 294 providers of this specialty with any payment received $9,151.53 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Pediatric Infectious Diseases Physician providers in New York
There are 120 pediatric infectious diseases physician records in New York.
Other pediatric infectious diseases physician records in New York
- Karen Acker, M.D.New York, NY1659647881
- Rabia Agha, MDBrooklyn, NY1376524405
- Margaret Aldrich, M.D.Bronx, NY1205152097
- Nina Arlievsky, MDHawthorne, NY1396732095
- Saroj Bakshi, MDBronx, NY1376522003
- Howard Balbi, MDBabylon, NY1942201900
- Natalie Banniettis, M.D.Brooklyn, NY1861897761
- Christy Beneri, DOStony Brook, NY1013178920
- Mary Bonafede, M.D.West Islip, NY1376627661
- Mary Boyle, MD MPH DTM&HNew York, NY1922461433
Common questions
What is Margaret R. Hammerschlag, M.D.'s NPI number?
Margaret R. Hammerschlag, M.D.'s National Provider Identifier (NPI) is 1629053103, issued on Dec 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Margaret R. Hammerschlag, M.D. located?
The NPPES record lists a practice address at 450 Clarkson Ave, Brooklyn, NY, 11203. Phone: (718) 270-4714. Providers update this record themselves, so call before visiting.
How can I verify Margaret R. Hammerschlag, M.D.'s license?
NPPES lists New York license number 141472-1, 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.