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

Dr. John C Kortenber, OD

Individual provider Optometrist · NPI 1821049586

Dr. John C Kortenber, OD is an Optometry in Algona, Iowa. Graduated from University of Missouri St Louis - School of Optometry in 2001, 25 years ago. Accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
25
Trained at
University of Missouri St Louis - School of Optometry
Licensed in
MO
In the registry since
2006
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

112 N Thorington St
Algona, IA 50511-2614
Phone: (515) 395-3937
Fax: (515) 395-3938
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence 2002014339 (MO)

Record details

NPI number1821049586
Entity typeIndividual (Type 1)
GenderMale
Credentials OD
Sole proprietorNo
NPI enumeratedMay 15, 2006
Last updated in NPPESMarch 7, 2023
Mailing address112 N Thorington St, Algona, IA 50511-2614

Medicare enrollment

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

Medicare specialtyOPTOMETRY
Medical schoolUNIVERSITY OF MISSOURI ST LOUIS - SCHOOL OF OPTOMETRY
Graduated 2001 (25 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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