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DR. SWAMINADHAN GNANASHANMUGAM M.D.
NPI 1073765517
Thoracic Surgery (Cardiothoracic Vascular Surgery) in Saint Helena, CA

Active since October 15, 2008PECOS EnrolledAccepts Medicare Assignment
10 WOODLAND RD, SAINT HELENA, CA 94574(650) 804-8093 Get Directions Write a Review

NPPES record last updated: November 11, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Nov 11, 2025, Jul 13, 2023, Mar 1, 2022 (3 updates tracked since 2022).

About Dr. Swaminadhan Gnanashanmugam M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. SWAMINADHAN GNANASHANMUGAM M.D. (NPI 1073765517) is an individual thoracic surgery (cardiothoracic vascular surgery) provider in Saint Helena, California, licensed in California (A171765) and active in the NPI registry since October 2008. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Northwestern University Feinberg Medical School (2008).

NPPES Registry Identity

NPI1073765517
Entity TypeIndividualMale
Primary Taxonomy208G00000X
Provider Legal NameDR. SWAMINADHAN GNANASHANMUGAMCredential: M.D.
Location Address10 WOODLAND RDSaint Helena, CA 94574-9554
Mailing Address5082 Dupont DrSanta Rosa, CA 95409-3743 · (650) 804-8093 · Fax (650) 804-8093
Phone(650) 804-8093
Sole ProprietorNo
Medical School CMSNorthwestern University Feinberg Medical SchoolGraduated 2008
Enumeration DateOctober 15, 2008
Last NPPES UpdateNovember 11, 20253 updates tracked since enumeration
NPPES CertifiedNovember 11, 2025
✔ NPI 1073765517 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyThoracic Surgery (Cardiothoracic Vascular Surgery)Allopathic & Osteopathic Physicians
Taxonomy Code208G00000X
Licenses✔ Licensed in CA · A171765✔ Licensed in IL · 036157660✔ Licensed in FL · ME173914
Definition
A thoracic surgeon provides the operative, perioperative and critical care of patients with pathologic conditions within the chest. Included is the surgical care of coronary artery disease, cancers of the lung, esophagus and chest wall, abnormalities of the trachea, abnormalities of the great vessels and heart valves, congenital anomalies, tumors of the mediastinum and diseases of the diaphragm. The management of the airway and injuries of the chest is within the scope of the specialty.
10 WOODLAND RD, Saint Helena, CA 94574
Open in Google Maps ↗

Secondary Practice Locations 2

Location 11350 Hickory StMelbourne, FL 32901-3224 · Phone (321) 434-3455
Location 217360 Brookhurst StreetFountain Valley, CA 92708-3720 · Phone (714) 665-1797 · Fax (714) 665-4680

Other Identifiers 2

Medicaid128981100FL
OtherWF482FL · Hfmg

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Swaminadhan Gnanashanmugam M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2668805912
PECOS Enrollment IDI20230801003299
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Coronary artery bypass using artery graft, 1 graft 33533
A coronary artery bypass with one artery graft is a surgical procedure to improve blood flow to your heart. An artery from another part of your body is used to bypass a blocked or narrowed coronary artery. This can help reduce chest pain and risk of heart attack.
24 services24 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
22 services22 patients
Partial destruction and reconstruction of right upper heart chamber 33257
This procedure involves partially destroying and rebuilding the right upper chamber of your heart. It's done to correct irregular heart rhythms or other issues. It's a complex operation performed by expert heart surgeons to improve your heart's function.
18 services18 patients
Coronary artery bypass using vein or artery graft, 2 grafts 33518
A coronary artery bypass with 2 grafts is a surgery to improve blood flow to your heart. A surgeon takes a healthy vein or artery from your body and attaches it to the blocked coronary artery. This creates a new path for blood to flow, bypassing the blockage.
12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94574 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$192.16 typical visit price
range $65.08 – $192.16
Typical copayment $48.04 (range $16.27 – $48.04)
Most-billed visit code 99205
Established Patient
$80.32 typical visit price
range $21.86 – $157.83
Typical copayment $20.08 (range $5.46 – $39.45)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DOUGLAS PHILIP TAPPER M.D.
Internal Medicine (Critical Care Medicine)
10 WOODLAND RD
SAINT HELENA, CA 94574
Napa County (707) 963-6399
DR. GEOFFREY WILLIAM HORN DO
Radiology (Diagnostic Radiology)
10 WOODLAND RD
SAINT HELENA, CA 94574
Napa County (707) 963-6430
KATHERINE LYNN SALLAS
Perfusionist
10 WOODLAND RD
SAINT HELENA, CA 94574
Napa County (707) 963-3611
DAN CLAY M.D.
Emergency Medicine
10 WOODLAND RD
SAINT HELENA, CA 94574
Napa County (707) 963-6311
NAZIR J. HABIB MD
Internal Medicine (Critical Care Medicine)
10 WOODLAND RD
SAINT HELENA, CA 94574
Napa County (707) 963-6399
SEANEEN WHALEY F.N.P
Nurse Practitioner (Family)
10 WOODLAND RD, ICU ROOM 500
SAINT HELENA, CA 94574
Napa County (707) 963-6445
MONA HUISMAN
Occupational Therapist
10 WOODLAND RD
SAINT HELENA, CA 94574
Napa County (707) 963-6596
ADVENTIST HEALTH CALIFORNIA MEDICAL GROUP, INC.
Preventive Medicine (Public Health & General Preventive Medicine)
10 WOODLAND RD
SAINT HELENA, CA 94574
Napa County (707) 963-2002

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Swaminadhan Gnanashanmugam's NPI number?

The NPI number for Swaminadhan Gnanashanmugam is 1073765517. It was assigned to this individual provider in the NPPES registry on October 15, 2008.

Where is Swaminadhan Gnanashanmugam located?

Swaminadhan Gnanashanmugam practices at 10 Woodland Rd, Saint Helena, CA 94574. The listed phone number is (650) 804-8093.

What is Swaminadhan Gnanashanmugam's specialty?

The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.

Is Swaminadhan Gnanashanmugam enrolled in Medicare?

Yes. Swaminadhan Gnanashanmugam is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Swaminadhan Gnanashanmugam was last updated on November 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.