John D. Twelker, OD, PhD
- Medicare patients, 2024
- 139
- Part D claims, 2024
- 54
- MIPS score, 2024
- 93
- Industry payments
- $120
- Affiliated sites
- 2
- Practice address
- 1501 N Campbell Ave, Tucson, AZ 85724
- Practice phone
- Call (520) 626-2761
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
University of Arizona
Tucson, Arizona
Find John Twelker's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
John D. Twelker is an optometrist in Tucson, Arizona
John Twelker practices at University of Arizona in Tucson, Arizona.
John Twelker's NPI, 1255405940, was assigned on November 17, 2006. John Twelker graduated from University of California - School of Optometry in 1992. John Twelker holds Arizona license 1202.
- NPI
- 1255405940NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3072642321
- NPI enumeration date
- November 17, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (520) 626-2761
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
John D. Twelker practices at University of Arizona in Tucson, Arizona
John Twelker's primary practice is University of Arizona, at 1501 N Campbell Ave, Tucson, AZ 85724 in Pima County. The practice phone is (520) 626-2761.
- University of Arizona1501 N Campbell Ave, Tucson, AZ 85724 · Pima CountyPhone(520) 626-2761
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
John D. Twelker is affiliated with 3 sites of care and 2 medical groups
John Twelker's primary practice is University of Arizona in Tucson, Arizona. The medical group on file is Banner Medical Group. Dmand AI also links John Twelker to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at John D. Twelker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Twelker practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University of Arizona | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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John D. Twelker is one of 958 optometrists in Arizona
Optometrist is John Twelker's primary specialty in the NPI Registry, under taxonomy code 152W00000X. John Twelker is licensed in Arizona.
Specialties and state licenses
- Optometrist, ArizonaPrimary
Optometrists near John Twelker
Counts of optometrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
John D. Twelker treated 139 Medicare patients in 2024, average age 75
CMS counts 139 Medicare patients who saw John Twelker in 2024. The largest group is 65 to 74, with 66 patients. 74% of them have high cholesterol, and 61% have high blood pressure. Their average risk score is 0.97, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts John Twelker's median patient age at 45, with 55% women.
John Twelker's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
John Twelker's Medicare patients by sex, 2024
- Women7755%
- Men6245%
Chronic conditions among John Twelker's Medicare patients, 2024
- High cholesterol74%
- High blood pressure61%
- Arthritis33%
- Diabetes29%
- Ischemic heart disease22%
- Chronic kidney disease18%
- Osteoporosis17%
- Atrial fibrillation14%
Share of Medicare patients with each condition. A patient can have several.
John Twelker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 45
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
John D. Twelker wrote 54 Medicare Part D claims in 2024
In 2024, John Twelker wrote 54 Medicare Part D claims for 16 patients. 28% of them were for generic drugs.
John Twelker's Part D claims by kind of drug, 2024
- Generic15 claims28%
- Brand-name39 claims72%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
John D. Twelker scored 93 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for John Twelker for performance year 2024, reported through an alternative payment model (APM). John Twelker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
John Twelker's MIPS scores, performance year 2024
- 93of 100Final score
- 74.6of 100Quality
- 99of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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John D. Twelker received $120 in industry payments in 2025
CMS Open Payments shows 1 general payment to John Twelker from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Apellis Pharmaceuticals, Inc. paid the most, $120.
Companies that paid John Twelker the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
John D. Twelker graduated from University of California - School of Optometry
John Twelker graduated from University of California - School of Optometry in 1992.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for John D. Twelker's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about John D. Twelker
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is John D. Twelker's NPI number?
John D. Twelker's NPI number is 1255405940. It was assigned on November 17, 2006, and it is active in the NPI Registry.
What does John D. Twelker specialize in?
John D. Twelker is an optometrist in Tucson, Arizona. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does John D. Twelker practice?
John Twelker practices at 1501 N Campbell Ave, Tucson, AZ 85724. John Twelker's primary practice is University of Arizona in Tucson, Arizona. Dmand AI also links John Twelker to 2 group practices and clinics and 1 medical group.
What is John D. Twelker's office phone number?
The practice phone on file for John Twelker is (520) 626-2761.
What is John D. Twelker's medical license number?
John Twelker holds Arizona license 1202.
What medical group is John D. Twelker part of?
John Twelker is linked to Banner Medical Group. Dmand AI links John Twelker to 1 more medical group.
Does John D. Twelker accept Medicare?
Yes. CMS lists John Twelker as accepting Medicare assignment.
What is John D. Twelker's MIPS score?
John Twelker's MIPS final score for performance year 2024 is 93 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does John D. Twelker see?
CMS counts 139 Medicare patients who saw John Twelker in 2024, with an average age of 75.
Where did John D. Twelker go to medical school?
John Twelker graduated from University of California - School of Optometry in 1992.
Has John D. Twelker received payments from drug or device companies?
CMS Open Payments shows $120 in general payments to John Twelker from 1 company from 2025 to 2025. The largest total came from Apellis Pharmaceuticals, Inc.
How long has John D. Twelker been practicing?
John Twelker graduated from medical school in 1992, 34 years ago.
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