Swaminadhan Gnanashanmugam, M.D.
NPI 1073765517 · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Saint Helena, CA
Enrolled with Medicare as Practitioner - Thoracic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Swaminadhan Gnanashanmugam, M.D. is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider in Saint Helena, CA (NPI 1073765517).
Provider details
- NPI number
- 1073765517
- Entity type
- Individual
- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036157660 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
76 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Coronary Artery Bypass Using Artery Graft, 1 Graft33533 | 24 | $613 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 22 | $138 |
| Partial Destruction and Reconstruction of Right Upper Heart Chamber33257 | 18 | $236 |
| Coronary Artery Bypass Using Vein Or Artery Graft, 2 Grafts33518 | 12 | $148 |
Typical Medicare-allowed amounts for these services range $138–$613 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,018 across 27 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 17360 Brookhurst StreetFountain Valley, CA 92708-3720Phone: (714) 665-1797Fax: (714) 665-4680
- 1350 Hickory StMelbourne, FL 32901-3224Phone: (321) 434-3455
Registry dates
- Enumerated
- 2008-10-15
- Last updated
- 2025-11-11
- Certified
- 2025-11-11
Frequently asked questions
- What is Swaminadhan Gnanashanmugam's NPI number?
- Swaminadhan Gnanashanmugam's National Provider Identifier (NPI) is 1073765517, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Swaminadhan Gnanashanmugam's specialty?
- Swaminadhan Gnanashanmugam is listed in the NPPES registry with a primary specialty of Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (Allopathic & Osteopathic Physicians).
- Where is Swaminadhan Gnanashanmugam located?
- Swaminadhan Gnanashanmugam's practice location on file with NPPES is 10 Woodland Rd, Saint Helena, CA 94574-9554.
- What is Swaminadhan Gnanashanmugam's phone number?
- The practice phone number listed in the NPPES registry for Swaminadhan Gnanashanmugam is (650) 804-8093.
- Does Swaminadhan Gnanashanmugam accept Medicare?
- Swaminadhan Gnanashanmugam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Swaminadhan Gnanashanmugam's NPI active?
- Yes — Swaminadhan Gnanashanmugam's NPI (1073765517) is active in the NPPES registry as of the last update on 2025-11-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.