Gregg Alan Ellison, MD
Internal Medicine Physician · Templeton, CA
Gregg Alan Ellison, MD is an internal medicine physician with a practice address in Templeton, California, and NPI 1073573168, issued on Mar 24, 2006. Check the license (California A33338, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregg Alan Ellison
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A33338 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1105 Las Tablas RD, Templeton, CA 93465
- Phone
- (805) 434-1851
- Enumerated
- Mar 24, 2006
- Record last updated
- Feb 25, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (805) 434-1193
- Medicare enrollment
- Enrolled (PECOS I20090502000012); may accept Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 1977
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1105 Las Tablas RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kevin Colton, MDInternal Medicine Physician1770542268
- Anthony Sheplay, MDPain Medicine (Physical Medicine & Rehabilitation) Physician1679589980
Verify Gregg Alan Ellison in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A33338Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
About as many Medicare Part D claims as the average internal medicine physician in 2024
3,186 Medicare Part D claims for 240 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 38 claims were for opioids.
Most prescribed
- Atorvastatin Calcium147 claims
- Amlodipine Besylate133 claims
- Losartan Potassium123 claims
- Levothyroxine Sodium100 claims
- Eliquis98 claims
- Metoprolol Succinate93 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 19.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- David B. HammerTempleton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregg Alan Ellison among 17,696 internal medicine physician records in California
Gregg Alan Ellison, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1977 · median 2004 among the 11,065 with a school on file
- Record last updated2009 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 internal medicine physician records list a practice address in Templeton
They are 16 of the 326 NPPES records with a practice address in Templeton, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Templeton → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Allen Avedian, M.D.Templeton, CA 934651003340423
- Shannon Berry, M.D.Templeton, CA 934651013909811
- Suvarna Choudhari, M.D.Templeton, CA 934651578855995
- Kevin Colton, MDTempleton, CA 934651770542268
- Julie Fallon, M.D.Templeton, CA 934651790777506
- Steven McAllen, M.D.Templeton, CA 934651821081043
- Anphong NguyenTempleton, CA 934651962065920
- Asad Shah, M.D.Templeton, CA 934651689794125
Common questions
What is Gregg Alan Ellison, MD's NPI number?
Gregg Alan Ellison, MD's National Provider Identifier (NPI) is 1073573168, issued on Mar 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregg Alan Ellison, MD located?
The NPPES record lists a practice address at 1105 Las Tablas RD, Templeton, CA, 93465. Phone: (805) 434-1851. Providers update this record themselves, so call before visiting.
How can I verify Gregg Alan Ellison, MD's license?
NPPES lists California license number A33338, 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.
How much does Gregg Alan Ellison, MD prescribe under Medicare Part D?
In 2024, Gregg Alan Ellison, MD had 3,186 Medicare Part D claims for 240 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Gregg Alan Ellison, MD's MIPS final score?
The 2023 MIPS final score is 19.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
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.