JOHN D TWELKER OD, PHD
NPI 1255405940
Optometrist in Tucson, AZ
About John D Twelker Od, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN D TWELKER OD, PHD (NPI 1255405940) is an individual optometrist in Tucson, Arizona, licensed in Arizona (1202) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of University Of California - School Of Optometry (1992).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
John D Twelker Od, Phd is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show John Twelker reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Tucson, AZ 85712
- Reassigned Medicare billing, Arizona enrollment
- 138 clinicians in this Medicare group
Tucson, AZ 85711
- Reassigned Medicare billing, Arizona enrollment
- 1,514 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 85711 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 13
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
TUCSON, AZ 85711
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Twelker's NPI number?
The NPI number for John Twelker is 1255405940. It was assigned to this individual provider in the NPPES registry on November 17, 2006.
Where is John Twelker located?
John Twelker practices at 707 N Alvernon Way Ste 301, Tucson, AZ 85711. The listed phone number is (520) 694-1460.
What is John Twelker's specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is John Twelker enrolled in Medicare?
Yes. John Twelker is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for John Twelker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Twelker reassigns Medicare benefits to 2 organizations: Children's Clinics For Rehabilitative Services (Tucson, AZ) and Banner-University Medical Group (Tucson, AZ). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Twelker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Twelker accept?
Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Blue Cross Blue Shield of Arizona, Cigna HealthCare of Arizona, Inc and Oscar Health and 8 other insurers list John Twelker as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for John Twelker was last updated on May 24, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# John D Twelker, OD, PHD · NPI 1255405940
Optometrist provider in Tucson, Arizona. Individual provider, active in the CMS NPPES registry since November 17, 2006.
## Identity
- **NPI:** 1255405940 (Entity type: Individual)
- **Enumerated:** November 17, 2006
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **State license:** 1202 (Arizona)
- **Sole proprietor:** No
## Practice location
- **Address:** 707 N ALVERNON WAY STE 301, Tucson, AZ 85711-1848
- **Phone:** (520) 694-1460 · **Fax:** (520) 694-1464
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Children's Clinics For Rehabilitative Services (NPI 1063454346, Tucson, AZ); Banner-University Medical Group (NPI 1932708328, Tucson, AZ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California - School Of Optometry, class of 1992
## Record status
- **NPPES last updated:** May 24, 2010
- **Other identifiers:** Medicare UPIN U40871; Medicare ID-Type Unspecified 70963; Medicaid 709090 (AZ)
---
Source: [NPI Profile](https://npiprofile.com/npi/1255405940) · Data from the CMS NPPES public registry.