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

John D Twelker, OD, PHD

Individual provider Optometrist · NPI 1255405940

John D Twelker, OD, PHD is an Optometry in Tucson, Arizona. Graduated from University of California - School of Optometry in 1992, 34 years ago. Practices with Banner-University Medical Group, a 1,071-clinician group and accepts Medicare assignment. Licensed in Arizona.

Years since qualifying
34
Trained at
University of California - School of Optometry
Licensed in
AZ
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.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

707 N Alvernon Way Ste 301
Tucson, AZ 85711-1848
Phone: (520) 694-1460
Fax: (520) 694-1464
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence 1202 (AZ)

Record details

NPI number1255405940
Entity typeIndividual (Type 1)
GenderMale
Credentials OD , PHD
Sole proprietorNo
NPI enumeratedNovember 17, 2006
Last updated in NPPESMay 24, 2010
Mailing address2701 E Elvira Rd, Tucson, AZ 85756-7124

Medicare enrollment

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

Medicare specialtyOPTOMETRY
Medical schoolUNIVERSITY OF CALIFORNIA - SCHOOL OF OPTOMETRY
Graduated 1992 (34 years in practice)
Group practice Banner-University Medical Group — 1071 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

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