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John Hammer, M.D.
NPI 1184731754 · Internal Medicine Physician · Garrison, NY
John Hammer, M.D. is a Internal Medicine Physician provider in Garrison, NY (NPI 1184731754).
Provider details
- NPI number
- 1184731754
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 155011-1 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Rte 9 & Graymoor
St. Christopher'S Inn
Garrison, NY 10524
Phone: (845) 424-3616
Fax: (845) 424-3598
Approximate (ZIP-level) locationGet directions
Mailing address
Rte 9 & Graymoor
Garrison, NY 10524
Registry dates
- Enumerated
- 2006-08-23
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Hammer's NPI number?
- John Hammer's National Provider Identifier (NPI) is 1184731754, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Hammer's specialty?
- John Hammer is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Hammer located?
- John Hammer's practice location on file with NPPES is Rte 9 & Graymoor, Garrison, NY 10524.
- What is John Hammer's phone number?
- The practice phone number listed in the NPPES registry for John Hammer is (845) 424-3616.
- Is John Hammer's NPI active?
- Yes — John Hammer's NPI (1184731754) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.