Swaminadhan Gnanashanmugam, M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Saint Helena, CA
Swaminadhan Gnanashanmugam, M.D. is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Saint Helena, California, and NPI 1073765517, issued on Oct 15, 2008. Check the license (California A171765, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Swaminadhan Gnanashanmugam
- Credential
- M.D.
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License numbers
- A171765 CA
ME173914 FL
036157660 IL
Self-reported in NPPES; status is on the state search - Practice location
- 10 Woodland RD, Saint Helena, CA 94574
- Phone
- (650) 804-8093
- Enumerated
- Oct 15, 2008
- Record last updated
- Nov 11, 2025
- Medicaid ID
- 128981100 FL
- Medicare enrollment
- Enrolled (PECOS I20230801003299); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2008
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 634 in California → Look up another NPI →
Also registered at 10 Woodland RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nora Allen, RN, CNSAcute Care Clinical Nurse Specialist1710481932
- Stephen Banks, MDRadiation Oncology Physician1770680852
- Wendy Battistini, PTPhysical Therapist1215888276
- Julie Butulia, RDRegistered Dietitian1679376891
- Danny Cao, PHARMACISTPharmacist1447069570
- David Carelock, CRNACertified Registered Nurse Anesthetist1790773596
Verify Swaminadhan Gnanashanmugam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A171765Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $2,018.02
27 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. 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 2 group practices
- Adventist Health Physicians NetworkMarysville, CA
- Providence Medical FoundationSanta Rosa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Swaminadhan Gnanashanmugam among 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California
Swaminadhan Gnanashanmugam, 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 2008, is newer than 63% of them.
- NPI issued2008 · 63% of these records are older, 30% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2008 · median 1997 among the 408 with a school on file
- Record last updated2025 · 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).
5 thoracic surgery (cardiothoracic vascular surgery) physician records list a practice address in Saint Helena
They are 5 of the 232 NPPES records with a practice address in Saint Helena, and 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California.
All 634 in California → Every provider in Saint Helena → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →
The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes
- Gansevoort Dunnington, M.D.Saint Helena, CA 945741336335140
- John Jacobson, M.D.Saint Helena, CA 945741528048659
- Armin Kiankhooy, MDSaint Helena, CA 945741225156482
- Aaron Kime, M.D.Saint Helena, CA 945741841635869
- Isaac Choy, M.D.San Leandro, CA 945771578641320
- Thomas Tung, M.D.San Leandro, CA 945771053474379
- Robert Klingman, MDNapa, CA 945581982670667
- Shea Pribyl, D.O.Napa, CA 945581639336050
Common questions
What is Swaminadhan Gnanashanmugam, M.D.'s NPI number?
Swaminadhan Gnanashanmugam, M.D.'s National Provider Identifier (NPI) is 1073765517, issued on Oct 15, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Swaminadhan Gnanashanmugam, M.D. located?
The NPPES record lists a practice address at 10 Woodland RD, Saint Helena, CA, 94574. Phone: (650) 804-8093. Providers update this record themselves, so call before visiting.
How can I verify Swaminadhan Gnanashanmugam, M.D.'s license?
NPPES lists California license number A171765, 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.
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.