Gregory Morris Giesler, MD
Cardiovascular Disease Physician · Pasadena, CA
Gregory Morris 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 Morris 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
- Record last updated
- Apr 12, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (626) 793-3794
- Medicare enrollment
- Enrolled (PECOS I20060522000061); accepts Medicare assignment
- Medical or professional school
- Chicago College Of Medicine And Surgery, 1999
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 2,574 in California → Look up another NPI →
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.Endocrinology, Diabetes & Metabolism Physician1568631091
- Kristin Chapman, MDPediatrics Physician1093787822
- John Easthope, MDCardiovascular Disease Physician1174580328
- Walter Edmiston, MDCardiovascular Disease Physician1407811128
- Joel Heger, MDCardiovascular Disease Physician1578528204
Verify Gregory Morris 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 3,078 among the 20,728 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 MIPS final score for 2023 (Medicare payment program): 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; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 16,686 providers of this specialty with any payment received $3,819.56 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 Heart SpecialistsPasadena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Morris Giesler among 2,574 cardiovascular disease physician records in California
Gregory Morris Giesler, MD is one of 2,574 cardiovascular disease 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. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 45% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1999 · median 1999 among the 1,742 with a school on file
- Record last updated2011 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in California
There are 2,574 cardiovascular disease physician records in California.
All 2,574 in California → Every provider in Pasadena → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Gary Conrad, M.D.Pasadena, CA 911051669424271
- John Easthope, MDPasadena, CA 911051174580328
- Walter Edmiston, MDPasadena, CA 911051407811128
- Joel Heger, MDPasadena, CA 911051578528204
- Joshua Jacobi, M.D.Pasadena, CA 911051710109509
- Michael Luu, MDPasadena, CA 911051578520763
- Paul Maher, MDPasadena, CA 911051750348942
- Mark Myers, MDPasadena, CA 911051669439857
Common questions
What is Gregory Morris Giesler, MD's NPI number?
Gregory Morris 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 Morris 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 Morris 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 Morris Giesler, MD prescribe under Medicare Part D?
In 2024, Gregory Morris Giesler, MD had 8,413 Medicare Part D claims for 891 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
What is Gregory Morris Giesler, MD's MIPS final 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), 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.