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

Dr. John Peter Czaja, OD

Individual provider Optometrist · NPI 1679883912

Dr. John Peter Czaja, OD is an Optometry in Merrillville, Indiana. Graduated from Indiana University - School of Optometry in 1997, 29 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in Indiana.

Years since qualifying
29
Trained at
Indiana University - School of Optometry
Licensed in
IN
In the registry since
2010
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

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Practice location Address checks out

8100 Broadway Ste A
Merrillville, IN 46410-6215
Phone: (219) 769-2020
Fax: (219) 756-8937
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence 18002875A (IN)

Record details

NPI number1679883912
Entity typeIndividual (Type 1)
GenderMale
Credentials OD
Sole proprietorYes
NPI enumeratedOctober 20, 2010
Last updated in NPPESOctober 20, 2010

Medicare enrollment

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

Medicare specialtyOPTOMETRY
Medical schoolINDIANA UNIVERSITY - SCHOOL OF OPTOMETRY
Graduated 1997 (29 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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