Timothy Guenther, MD

Primary specialty

Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianTaxonomy code 208G00000X

License

151538 Issued in CA

Practice address

101 Bodin Cir
Travis Afb, CA 94535-1809

Phone

(707) 423-3000

NPI assigned

Apr 28, 2016

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Cardiac Surgery

Education

Other, 2016

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Northbay Physicians Surgery Center, LLCGroup PAC ID 0042122244, 336 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Northbay Medical Center Hospital, Fairfield, CA, CCN 050367

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: tguenther888654@direct.unitypoint.org

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Northbay Healthcare Group

  • General Acute Care Hospital
  • Fairfield, CA
  • NPI 1821147786
  Medicare reassignment Care Compare group NPD
• Northbay Health Medical Foundation

  • Internal Medicine Physician
  • Fairfield, CA
  • NPI 1760283527
  Medicare reassignment NPD
• Northbay Healthcare Group

  • Multi-Specialty Clinic/Center
  • Vacaville, CA
  • NPI 1760534713
  NPD
• St Luke'S Methodist Hospital

  • General Acute Care Hospital
  • Cedar Rapids, IA
  • NPI 1083708226
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Northbay Healthcare Group

  • General Acute Care Hospital
  • Fairfield, CA
  • NPI 1821147786
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1461801600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1756771200000",
    "number": "1003261892",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "101 BODIN CIR",
            "city": "TRAVIS AFB",
            "state": "CA",
            "postal_code": "945351809"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "101 BODIN CIR",
            "city": "TRAVIS AFB",
            "state": "CA",
            "postal_code": "945351809",
            "telephone_number": "707-423-3000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GUENTHER",
        "first_name": "TIMOTHY",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2016-04-28",
        "last_updated": "2025-09-02",
        "certification_date": "2025-09-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208G00000X",
            "taxonomy_group": "",
            "desc": "Thoracic Surgery (Cardiothoracic Vascular Surgery)",
            "state": "CA",
            "license": "151538",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Benjamin M Grant
• Molly Ann Greenwalt
• Shawna Mills Greiner, CRNA
• Adam Charles Grobart, DMD
• Daniel Gross, PSY.D.
• Aaron Guevara
• James Gullo, M.D.
• Ada L Haber-Perez, AUD
• Andrea Marie Hages, D.O.
• Catoya Hale, PMHNP-BC

• Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Travis Afb, CA
• Providers in Travis Afb, CA by specialty
• Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 2, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.