NPPES file of Aug 9, 2026

Gregory Wayne Mellor, M.D.

Diagnostic Radiology Physician · Porterville, CA

Gregory Wayne Mellor, M.D. is a diagnostic radiology physician with a practice address in Porterville, California, and NPI 1548333982, issued on Nov 15, 2006. Check the license (California G40981, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1548333982
Name
Gregory Wayne Mellor
Credential
M.D.
Primary taxonomy
Diagnostic Radiology Physician 2085R0202X
License number
G40981 CA
Self-reported in NPPES; status is on the state search
Practice location
590 W Putnam Ave, Porterville, CA 93257
Phone
(559) 782-1973
Enumerated
Nov 15, 2006
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(559) 782-1976
Medicaid IDs
00G409811 CA
00G409810 CA
Medicare enrollment
Enrolled (PECOS I20081009000544); accepts Medicare assignment
Medical or professional school
University Of Missouri, Kansas City, School Of Medicine, 1977
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →

Also registered at 590 W Putnam Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Lareina Adams, DNPFamily Nurse Practitioner1366863888
  2. Juan Alarcon Medina, PA-CPhysician Assistant1720727225
  3. Mona Attalla, P.A.Physician Assistant1073633301
  4. Clarissa AvalosNurse Practitioner1922947860
  5. Ana BorbaFamily Nurse Practitioner1649673559
  6. Teri Brown, M.D.Pediatrics Physician1184761363

Verify Gregory Wayne Mellor in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G40981    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Gregory Wayne Mellor among 4,500 diagnostic radiology physician records in California

Gregory Wayne Mellor, M.D. is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 7% of them.

  • NPI issued2006 · 7% of these records are older, 52% newer
  • In a Medicare fileNo · 74% of these records are
  • In the CMS Doctors and Clinicians fileYes · 70% of these records are
  • Graduated1977 · median 2004 among the 3,130 with a school on file
  • Record last updated2007 · 60% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Diagnostic Radiology Physician providers in California

There are 4,500 diagnostic radiology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 4,500 in California → Every provider in Porterville → Diagnostic Radiology Physician nationwide →

The 8 diagnostic radiology physician records with the nearest ZIP codes

  1. Aninchana Sangkharat, D.O.Porterville, CA 932571730258120
  2. Reilly Zenk, DOLemoore, CA 932461821335407
  3. Frank Macaluso, M.D.Tulare, CA 932741346262276
  4. Prudence Smith, M.D.Tulare, CA 932741780748590
  5. Jaime Aguet, M.D.Visalia, CA 932771063436939
  6. Ronald Beggs, M.D.Visalia, CA 932771104847037
  7. Aaron Berkey, MDVisalia, CA 932771881685394
  8. Troy BouitVisalia, CA 932771871514703

Common questions

What is Gregory Wayne Mellor, M.D.'s NPI number?

Gregory Wayne Mellor, M.D.'s National Provider Identifier (NPI) is 1548333982, issued on Nov 15, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Gregory Wayne Mellor, M.D. located?

The NPPES record lists a practice address at 590 W Putnam Ave, Porterville, CA, 93257. Phone: (559) 782-1973. Providers update this record themselves, so call before visiting.

How can I verify Gregory Wayne Mellor, M.D.'s license?

NPPES lists California license number G40981, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.