NPPES file of Aug 9, 2026

Ross Martin Hammerman

Obstetrics & Gynecology Physician · New York, NY

Ross Martin Hammerman is an obstetrics & gynecology physician with a practice address in New York, New York, and NPI 1396086930, issued on Mar 6, 2013. Check the license (New York 204592, as entered in NPPES) on the NYS Education Department, Office of the Professions; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1396086930
Name
Ross Martin Hammerman
Primary taxonomy
Obstetrics & Gynecology Physician 207V00000X
License number
204592 NY
Self-reported in NPPES; status is on the state search
Practice location
1175 York Ave, New York, NY 10065
Phone
(212) 980-7990
Enumerated
Mar 6, 2013
Record last updated
Mar 6, 2013 (not updated in 13 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest obstetrics & gynecology physician records → All 3,174 in New York → Look up another NPI →

Also registered at 1175 York Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Rajendra Birla, MDSpecialist1528337987
  2. Jennifer Celio, OTR/LPediatric Occupational Therapist1881846806

Verify Ross Martin Hammerman in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
    Search for license 204592    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the New York license search

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Ross Martin Hammerman among 3,174 obstetrics & gynecology physician records in New York

Ross Martin Hammerman is one of 3,174 obstetrics & gynecology physician records with a practice address in New York. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2013, is newer than 76% of them.

  • NPI issued2013 · 76% of these records are older, 22% newer
  • In a Medicare fileNo · 76% of these records are
  • In the CMS Doctors and Clinicians fileNo · 59% of these records are
  • Record last updated2013 · 63% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Obstetrics & Gynecology Physician providers in New York

There are 3,174 obstetrics & gynecology physician records in New York. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 3,174 in New York → Every provider in New York → Obstetrics & Gynecology Physician nationwide →

The 8 obstetrics & gynecology physician records with the nearest ZIP codes

  1. Allison Boester, MDNew York, NY 100651194761379
  2. Wing Kay FokNew York, NY 100651356600076
  3. Aileen Gariepy, M.D.New York, NY 100651184640252
  4. Katherine HuskNew York, NY 100651437418662
  5. Shirlee Jaffe, MDNew York, NY 100651144476540
  6. Harry Karamitsos, MDNew York, NY 100651467557389
  7. Garrick Leonard, MDNew York, NY 100651417904335
  8. Eleonora Markesic, DONew York, NY 100651689970410

Common questions

What is Ross Martin Hammerman's NPI number?

Ross Martin Hammerman's National Provider Identifier (NPI) is 1396086930, issued on Mar 6, 2013. An NPI identifies a provider in billing; it is not a license.

Where is Ross Martin Hammerman located?

The NPPES record lists a practice address at 1175 York Ave, New York, NY, 10065. Phone: (212) 980-7990. Providers update this record themselves, so call before visiting.

How can I verify Ross Martin Hammerman's license?

NPPES lists New York license number 204592, 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. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.