Quick answers
- Does Joshua K. Duncan accept Medicare assignment?
- Yes. Medicare's clinician data says Joshua K. Duncan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Joshua K. Duncan see?
- In 2024, CMS data shows 1,078 Original Medicare patients and 3,798 services for Joshua K. Duncan. This counts Original Medicare only and measures volume, not quality.
- What is Joshua K. Duncan's NPI number?
- 1457612830. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Joshua K. Duncan, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 1,078 |
|---|---|
| Services billed to Medicare | 3,798 |
| Different services or procedures | 49 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Measurement of corneal curvature and depth of eye (92136)849 services
- Removal of cataract with insertion of prosthetic lens (66984)798 services
- Imaging of retina (92134)375 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)326 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)297 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol74%
- High blood pressure60%
- Arthritis43%
- Ischemic heart disease24%
- Chronic kidney disease19%
- Diabetes18%
Practice locations
Addresses where Joshua K. Duncan is enrolled with Medicare (CMS data updated October 2, 2026).
- 18325 N Allied Way, Suite 100Phoenix, AZ 85054 (602) 953‑3339
Group practices
Medicare enrollment lists Joshua K. Duncan as a member of this group (CMS data updated October 2, 2026).
- Millennium Vision Inc17 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Phoenix
Clinicians with the same Medicare primary specialty in Phoenix, AZ — not a recommendation.
Other clinicians in Millennium Vision Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Arizona College Of Osteopathic Medicine Mid Western University |
| Graduation year | 2012 (14 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1457612830 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians