Ian Stewart Harris, M.D.
Adult Congenital Heart Disease Physician · San Francisco, CA
Ian Stewart Harris, M.D. is an adult congenital heart disease physician with a practice address in San Francisco, California, and NPI 1558577106, issued on May 14, 2007. Check the license (California A86662, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ian Stewart Harris
- Credential
- M.D.
- Primary taxonomy
- Adult Congenital Heart Disease Physician 207RA0002X
- License number
- A86662 CA
Self-reported in NPPES; status is on the state search - Practice location
- 505 Parnassus Ave, San Francisco, CA 94143
- Phone
- (415) 476-1326
- Enumerated
- May 14, 2007
- Record last updated
- Feb 22, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20080114000858); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1999
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 505 Parnassus Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexander Aabedi, MDStudent in an Organized Health Care Education/Training Program1245971480
- Kathryn Aaronson, RN, CPNPPediatric Nurse Practitioner1992030951
- Sharon AbadaStudent in an Organized Health Care Education/Training Program1003492844
- Abul Abbas, MBBSAnatomic Pathology Physician1881652964
- Jesse Abelson, MDInternal Medicine Physician1083843817
- Rhonald AbitonaAcute Care Nurse Practitioner1164993473
Verify Ian Stewart Harris in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A86662Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average adult congenital heart disease physician in 2024
247 Medicare Part D claims for 46 beneficiaries, against an average of 462 among the 117 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Atorvastatin Calcium43 claims
- Losartan Potassium37 claims
- Furosemide31 claims
- Metoprolol Succinate19 claims
- Rosuvastatin Calcium13 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): 74.5 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).
Bills Medicare through 4 group practices
- County OF MontereySalinas, CA
- Regents OF The University OF CaliforniaSan Francisco, CA
- Ucsf Medical Group Business ServicesSan Francisco, CA
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Adult Congenital Heart Disease Physician providers in California
There are 22 adult congenital heart disease physician records in California.
Other adult congenital heart disease physician records in California
- Ramesh Bansal, M.D.Loma Linda, CA1508884388
- Joseph Bayne, M.D.San Francisco, CA1316301179
- Matthew Carazo, M.D.San Diego, CA1952535114
- Daniel Clark, MDStanford, CA1932545233
- Taylor Holve, M.D.Santa Barbara, CA1477756815
- Ahmed Kheiwa, MDLoma Linda, CA1285865675
- David Laughrun, M.D.Los Angeles, CA1659353316
- Angela Li, M.D.Orange, CA1235510173
- Jeannette Lin, M.D.Orange, CA1568686491
- George Lui, MDStanford, CA1588639231
Common questions
What is Ian Stewart Harris, M.D.'s NPI number?
Ian Stewart Harris, M.D.'s National Provider Identifier (NPI) is 1558577106, issued on May 14, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ian Stewart Harris, M.D. located?
The NPPES record lists a practice address at 505 Parnassus Ave, San Francisco, CA, 94143. Phone: (415) 476-1326. Providers update this record themselves, so call before visiting.
How can I verify Ian Stewart Harris, M.D.'s license?
NPPES lists California license number A86662, 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 Ian Stewart Harris, M.D. prescribe under Medicare Part D?
In 2024, Ian Stewart Harris, M.D. had 247 Medicare Part D claims for 46 beneficiaries; the average among adult congenital heart disease physician prescribers was 462. Part D covers Medicare prescriptions only.
What is Ian Stewart Harris, M.D.'s MIPS final score?
The 2023 MIPS final score is 74.5 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.