John T. Hammer, M.D.
Internal Medicine Physician · Garrison, NY
John T. Hammer, M.D. is an internal medicine physician with a practice address in Garrison, New York, and NPI 1184731754, issued on Aug 23, 2006. Check the license (New York 155011-1, 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.
- Name
- John T. Hammer
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 155011-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- Rte 9 & Graymoor, Garrison, NY 10524
- Phone
- (845) 424-3616
- Enumerated
- Aug 23, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (845) 424-3598
- Entity
- Type 1 · individual
Also registered at Rte 9 & Graymoor
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Amelia Sucich, LCSWClinical Social Worker1912917683
Verify John T. Hammer 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 155011-1Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1 internal medicine physician records list a practice address in Garrison
They are 1 of the 85 NPPES records with a practice address in Garrison, and 12,067 internal medicine physician records in New York. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
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Common questions
What is John T. Hammer, M.D.'s NPI number?
John T. Hammer, M.D.'s National Provider Identifier (NPI) is 1184731754, issued on Aug 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John T. Hammer, M.D. located?
The NPPES record lists a practice address at Rte 9 & Graymoor, Garrison, NY, 10524. Phone: (845) 424-3616. Providers update this record themselves, so call before visiting.
How can I verify John T. Hammer, M.D.'s license?
NPPES lists New York license number 155011-1, 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. 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.