Gregory Giesler, MD
Cardiovascular Disease Physician · Pasadena, CA
Gregory Giesler, MD is a cardiovascular disease physician with a practice address in Pasadena, California, and NPI 1477518454, issued on Apr 20, 2006. Check the license (California A75160, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory Giesler
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- A75160 CA
Self-reported in NPPES; status is on the state search - Practice location
- 55 E California Blvd, Pasadena, CA 91105
- Phone
- (626) 793-1227
- Enumerated
- Apr 20, 2006
- Entity
- Type 1 · individual
Also registered at 55 E California Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Cantor, MDSpecialist1689646713
- Jennifer Chang, M.D.Internal Medicine Physician1568631091
- Kristin Chapman, MDPediatrics Physician1093787822
- John Easthope, MDCardiovascular Disease Physician1174580328
- Walter Edmiston, MDCardiovascular Disease Physician1407811128
- Joel Heger, MDCardiovascular Disease Physician1578528204
Verify Gregory Giesler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A75160Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
2.7 times the Medicare Part D claims of the average cardiovascular disease physician in 2024
8,413 Medicare Part D claims for 891 beneficiaries, against an average of 3,149 among the 19,556 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Olmesartan Medoxomil916 claims
- Atorvastatin Calcium908 claims
- Amlodipine Besylate729 claims
- Eliquis634 claims
- Metoprolol Succinate631 claims
- Carvedilol594 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 practice group's Medicare quality score for 2023: 92.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $3,122.12
133 payments, mostly food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 16,209 providers of this specialty with any payment received $4,923.81 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.
One hospital or facility affiliation
- Southern California Heart SpecialistsPasadena, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Cardiovascular Disease Physician providers in California
There are 2,322 cardiovascular disease physician records in California.
Other cardiovascular disease physician records in California
- Abdul Abbasi, MDLong Beach, CA1710071717
- Lillian Abdelmalek, MDSacramento, CA1881343796
- Robin Abdelmalik, M.D. FACCTemecula, CA1275656662
- Roberto Abdelnur, MDEl Centro, CA1982648606
- Sohail Abdi-Moradi, M.D.Moorpark, CA1376862938
- Nadia Abelhad, M.D.Chula Vista, CA1619400801
- Mohammad Abid, MD FACCIndio, CA1699857706
- Georges Abou Rjaili, MDRiverside, CA1073896544
- Maria Abraham, M.D.San Francisco, CA1669436960
- Theodore Abraham, M.D.San Francisco, CA1467427096
Common questions
What is Gregory Giesler, MD's NPI number?
Gregory Giesler, MD's National Provider Identifier (NPI) is 1477518454, issued on Apr 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Giesler, MD located?
The NPPES record lists a practice address at 55 E California Blvd, Pasadena, CA, 91105. Phone: (626) 793-1227. Providers update this record themselves, so call before visiting.
How can I verify Gregory Giesler, MD's license?
NPPES lists California license number A75160, 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 Gregory Giesler, MD prescribe under Medicare Part D?
In 2024, Gregory Giesler, MD had 8,413 Medicare Part D claims for 891 beneficiaries; the average among cardiovascular disease physician prescribers was 3,149. Part D covers Medicare prescriptions only.
What is Gregory Giesler, MD's Medicare quality score?
The 2023 MIPS final score is 92.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.