John H Vassall II, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

MD00019787 Issued in WA

Practice address

515 Minor Ave
Suite 300
Seattle, WA 98104-2120

Phone

(206) 386-9500

Fax

(206) 386-9605

NPI assigned

Sep 30, 2005

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

Other identifiers 2

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

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.

• Proliance Surgeons Inc PS

  • Ambulatory Surgical Clinic/Center
  • Seattle, WA
  • NPI 1326094491
  NPD (past)

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

{
    "created_epoch": "1128038400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1619964103",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 3489",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981143489",
            "telephone_number": "206-386-9500",
            "fax_number": "206-386-9605"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "515 MINOR AVE",
            "address_2": "SUITE 300",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981042120",
            "telephone_number": "206-386-9500",
            "fax_number": "206-386-9605"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "VASSALL",
        "first_name": "JOHN",
        "middle_name": "H",
        "name_suffix": "II",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-09-30",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "WA",
            "license": "MD00019787",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "L & I",
            "identifier": "78924",
            "state": "WA"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "1066802",
            "state": "WA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Fidelia Vasquez
• Joe Luis Vasquez II
• Jonathan Vasquez
• Rose M. Vasquez
• Yvonne Marie Vasquez, LMP
• Vassalo Speech and Language LLC
• Tiffany Vassalo, M.S., CCC-SLP
• Rebecca Ann Vasta, OTR/L
• Gita Vasudeva, DC
• Sara Vasudeva

• Internal Medicine Physician in Seattle, WA
• Providers in Seattle, WA by specialty
• Internal Medicine Physician in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.