Gregor Paronian, M.D.
Internal Medicine Physician · Pasadena, CA
Gregor Paronian, M.D. is an internal medicine physician with a practice address in Pasadena, California, and NPI 1366627945, issued on Jan 2, 2008. Check the license (California A107875, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregor Paronian
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A107875 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1713 E Walnut St, Pasadena, CA 91106
- Phone
- (626) 696-3607
- Enumerated
- Jan 2, 2008
- Record last updated
- Jul 31, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (626) 696-3907
- Medicare enrollment
- Enrolled (PECOS I20121009000448); accepts Medicare assignment
- 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 1713 E Walnut St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Beainy Ohanian, FNP-CFamily Nurse Practitioner1629857255
Verify Gregor Paronian in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A107875Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14.7 times the Medicare Part D claims of the average internal medicine physician in 2024
46,817 Medicare Part D claims for 1,190 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 697 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium2,263 claims
- Atorvastatin Calcium1,415 claims
- Levothyroxine Sodium1,162 claims
- Amlodipine Besylate1,084 claims
- Metformin Hcl994 claims
- Gabapentin975 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): 8.7 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).
Industry payments in 2024: $3,204.47
143 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Southern California Internists Medical GroupPasadena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregor Paronian among 17,696 internal medicine physician records in California
Gregor Paronian, M.D. 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 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2007 · median 2004 among the 11,065 with a school on file
- Record last updated2020 · 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).
137 internal medicine physician records list a practice address in Pasadena
They are 137 of the 10,525 NPPES records with a practice address in Pasadena, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Pasadena → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- George Abrahamian, M.D.Pasadena, CA 911061568812196
- Robert Cann, M.D.Pasadena, CA 911061205939659
- Cindy Carson, MDPasadena, CA 911061891982633
- Irina Jasper, MDPasadena, CA 911061356421903
- Anthony Koerner, M.D.Pasadena, CA 911061487620357
- Marilynn Moore, MDPasadena, CA 911061306824545
- Thirumala Raju, MDPasadena, CA 911061447346002
- Sahniah Siciarz-Lambert, M.D.Pasadena, CA 911061215268917
Common questions
What is Gregor Paronian, M.D.'s NPI number?
Gregor Paronian, M.D.'s National Provider Identifier (NPI) is 1366627945, issued on Jan 2, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Gregor Paronian, M.D. located?
The NPPES record lists a practice address at 1713 E Walnut St, Pasadena, CA, 91106. Phone: (626) 696-3607. Providers update this record themselves, so call before visiting.
How can I verify Gregor Paronian, M.D.'s license?
NPPES lists California license number A107875, 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 Gregor Paronian, M.D. prescribe under Medicare Part D?
In 2024, Gregor Paronian, M.D. had 46,817 Medicare Part D claims for 1,190 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Gregor Paronian, M.D.'s MIPS final score?
The 2023 MIPS final score is 8.7 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.