Adam L. Harmon, M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Redwood City, CA
Adam L. Harmon, M.D. is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Redwood City, California, and NPI 1225069537, issued on Jul 5, 2006. Check the license (California G77973, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Adam L. Harmon
- Credential
- M.D.
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License number
- G77973 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2900 Whipple Ave, Redwood City, CA 94062
- Phone
- (650) 261-2366
- Enumerated
- Jul 5, 2006
- Record last updated
- Aug 4, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (650) 261-2369
- Medicaid ID
- 00A618120 CA
- Medicare enrollment
- Enrolled (PECOS I20040828000106); accepts Medicare assignment
- Medical or professional school
- Albany Medical College Of Union University, 1985
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 634 in California → Look up another NPI →
Also registered at 2900 Whipple Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gary Aron, M.D.Internal Medicine Physician1619984911
- Kathleen Berra, N.P.Nurse Practitioner1386698520
- Shalini Bhambani, M.D.Cardiovascular Disease Physician1558635474
- Barrett Bryan, MDInternal Medicine Physician1033133954
- Luis Castro, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1679587893
- Elaine Chien, MDObstetrics & Gynecology Physician1457423295
Verify Adam L. Harmon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G77973Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The MIPS final score for 2023 (Medicare payment program): 96.5 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: $16.33
1 payment: food and beverage; the largest payer was Ethicon US, LLC. The 4,047 providers of this specialty with any payment received $7,828.84 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
- Dignity Health Medical FoundationBelmont, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Adam L. Harmon among 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California
Adam L. Harmon, M.D. is one of 634 thoracic surgery (cardiothoracic vascular surgery) physician records with a practice address in California. 75% 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 · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1985 · median 1997 among the 408 with a school on file
- Record last updated2014 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208G00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in California
There are 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California.
All 634 in California → Every provider in Redwood City → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →
The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes
- Luis Castro, M.D.Redwood City, CA 940621679587893
- James Morris, MDSouth San Francisco, CA 940801457439002
- Patrick Maguire, MDMountain View, CA 940401518327931
- Robert Mitchell, MDMountain View, CA 940401356431795
- John Macoviak, M.D.Atherton, CA 940271679798839
- Edward Stinson, M.D.Los Altos Hills, CA 940221790962546
- George Allman, M.D.Daly City, CA 940151619982592
- G. AverySan Francisco, CA 941091154340289
Common questions
What is Adam L. Harmon, M.D.'s NPI number?
Adam L. Harmon, M.D.'s National Provider Identifier (NPI) is 1225069537, issued on Jul 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Adam L. Harmon, M.D. located?
The NPPES record lists a practice address at 2900 Whipple Ave, Redwood City, CA, 94062. Phone: (650) 261-2366. Providers update this record themselves, so call before visiting.
How can I verify Adam L. Harmon, M.D.'s license?
NPPES lists California license number G77973, 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.
What is Adam L. Harmon, M.D.'s MIPS final score?
The 2023 MIPS final score is 96.5 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.