NPPES file of Aug 9, 2026

Gary L. Harkins, M.D.

Hematology & Oncology Physician · San Luis Obispo, CA

Gary L. Harkins, M.D. is a hematology & oncology physician with a practice address in San Luis Obispo, California, and NPI 1942204375, issued on Jun 13, 2005. Check the license (California G25721, 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
1942204375
Name
Gary L. Harkins
Credential
M.D.
Primary taxonomy
Hematology & Oncology Physician 207RH0003X
License number
G25721 CA
Self-reported in NPPES; status is on the state search
Practice location
1941 Johnson Ave, San Luis Obispo, CA 93401
Phone
(805) 543-5577
Enumerated
Jun 13, 2005
Record last updated
Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(805) 595-3231
Medicaid IDs
00G257210 CA
GR0091140 CA
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →

Also registered at 1941 Johnson Ave

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

  1. Robert Doria, MD, FACCInterventional Cardiology Physician1376521005
  2. Michael Famularo, MD, FACCInterventional Cardiology Physician1174501845
  3. Lorianna Fletcher, MD, FACCCardiovascular Disease Physician1497715023
  4. Maria Flores-Cooper, M.D.Obstetrics & Gynecology Physician1649255480
  5. Richard Marks, P.A.C.Physician Assistant1952496556
  6. Steven Pontius, M.D., F.A.C.C.Cardiovascular Disease Physician1750360350

Verify Gary L. Harkins in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G25721    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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Gary L. Harkins among 1,583 hematology & oncology physician records in California

Gary L. Harkins, M.D. is one of 1,583 hematology & oncology physician records with a practice address in California. 83% 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 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 92% newer
  • In a Medicare fileNo · 83% of these records are
  • In the CMS Doctors and Clinicians fileNo · 71% of these records are
  • Record last updated2007 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hematology & Oncology Physician providers in California

There are 1,583 hematology & oncology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,583 in California → Every provider in San Luis Obispo → Hematology & Oncology Physician nationwide →

The 8 hematology & oncology physician records with the nearest ZIP codes

  1. Gorgun Akpek, M.D., M.H.S.San Luis Obispo, CA 934011124068515
  2. Erin Chamberlain, M.D.San Luis Obispo, CA 934011902249469
  3. Joseph ClevelandSan Luis Obispo, CA 934011992209381
  4. Brian Dicarlo, MDSan Luis Obispo, CA 934011982728796
  5. David Harrison, M.D.San Luis Obispo, CA 934011346265436
  6. Daniel Lewis, M.D.San Luis Obispo, CA 934011598749079
  7. Levanto Schachter, D.O.San Luis Obispo, CA 934011093031668
  8. Lin Soe, MBBS, MPH, TMSan Luis Obispo, CA 934011467524900

Common questions

What is Gary L. Harkins, M.D.'s NPI number?

Gary L. Harkins, M.D.'s National Provider Identifier (NPI) is 1942204375, issued on Jun 13, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Gary L. Harkins, M.D. located?

The NPPES record lists a practice address at 1941 Johnson Ave, San Luis Obispo, CA, 93401. Phone: (805) 543-5577. Providers update this record themselves, so call before visiting.

How can I verify Gary L. Harkins, M.D.'s license?

NPPES lists California license number G25721, 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.