Quick answers
- Does Gregory W. Mellor accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory W. Mellor 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 Gregory W. Mellor see?
- In 2024, CMS data shows 476 Original Medicare patients and 822 services for Gregory W. Mellor. This counts Original Medicare only and measures volume, not quality.
- What is Gregory W. Mellor's NPI number?
- 1548333982. 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 Gregory W. Mellor, 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 | 476 |
|---|---|
| Services billed to Medicare | 822 |
| Different services or procedures | 69 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- X-ray of chest, 2 views (71046)163 services
- X-ray of knee, 3 views (73562)81 services
- X-ray of shoulder, minimum of 2 views (73030)47 services
- X-ray of foot, minimum of 3 views (73630)41 services
- X-ray of lower and sacral spine, minimum of 4 views (72110)35 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 blood pressure75%
- High cholesterol72%
- Arthritis57%
- Diabetes46%
- Ischemic heart disease35%
- Chronic kidney disease28%
Practice locations
Addresses where Gregory W. Mellor is enrolled with Medicare (CMS data updated October 2, 2026).
- 833 Sequoia Ave, Suite BLindsay, CA 93247 (559) 562‑7172
Specialties
- Diagnostic Radiologyprimary
Other radiologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Missouri, Kansas City, School Of Medicine |
| Graduation year | 1977 (49 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548333982 |
| 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