Quick answers
- Does Thelma G. Barnes accept Medicare assignment?
- Yes. Medicare's clinician data says Thelma G. Barnes 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 Thelma G. Barnes see?
- In 2024, CMS data shows 1,070 Original Medicare patients and 1,855 services for Thelma G. Barnes. This counts Original Medicare only and measures volume, not quality.
- What is Thelma G. Barnes's NPI number?
- 1316920291. 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 Thelma G. Barnes, 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 | 1,070 |
|---|---|
| Services billed to Medicare | 1,855 |
| Different services or procedures | 27 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Established patient complete exam of visual system (92014)798 services
- Established patient problem focused exam of visual system (92012)251 services
- Imaging of optic nerve (92133)225 services
- Exam of visual field with extended testing (92083)208 services
- Imaging of retina (92134)124 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 cholesterol75%
- High blood pressure64%
- Arthritis43%
- Chronic kidney disease26%
- Diabetes24%
- Osteoporosis24%
Hospitals where Thelma G. Barnes works
Medicare's Facility Affiliation Data lists Thelma G. Barnes at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Mayo Clinic HospitalPhoenix, AZ · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 030103
Practice locations
Addresses where Thelma G. Barnes is enrolled with Medicare (CMS data updated October 2, 2026).
- 13400 E Shea BlvdScottsdale, AZ 85259 (480) 301‑8000
- 5701 E Mayo BlvdPhoenix, AZ 85054 (480) 342‑4200
- 5777 E Mayo BlvdPhoenix, AZ 85054
- 5777 E Mayo Blvd, Mayo Clinic HospitalPhoenix, AZ 85054
- 5779 E Mayo Blvd, Speciality BuildingPhoenix, AZ 85054 (480) 301‑8000
Group practices
Medicare enrollment lists Thelma G. Barnes as a member of this group (CMS data updated October 2, 2026).
- Mayo Clinic Arizona1,626 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Scottsdale
Clinicians with the same Medicare primary specialty in Scottsdale, AZ — not a recommendation.
Other clinicians in Mayo Clinic Arizona
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Optometry school | Southern California College Of Optometry |
| Graduation year | 1995 (31 years since optometry school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1316920291 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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