Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. John Robert Hammerer, OD

Individual provider Optometrist · NPI 1942498654

Dr. John Robert Hammerer, OD is an Optometry in Coxsackie, New York. Graduated from Southern College of Optometry in 1982, 44 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in New York.

Years since qualifying
44
Trained at
Southern College of Optometry
Licensed in
NY
In the registry since
2007
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

See every abbreviation used in this directory →

Practice location Address checks out

10A Ely St
Coxsackie, NY 12051-1216
Phone: (518) 731-9405
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence VUT-4868 (NY)

Record details

NPI number1942498654
Entity typeIndividual (Type 1)
GenderMale
Credentials OD
Sole proprietorYes
NPI enumeratedOctober 9, 2007
Last updated in NPPESSeptember 4, 2008
Mailing address83 Mansion St, Coxsackie, NY 12051-1216

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPTOMETRY
Medical schoolSOUTHERN COLLEGE OF OPTOMETRY
Graduated 1982 (44 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Coxsackie