Individual provider Active NPI

Ross Hedlund Frohn, MD

  • Anesthesiology Physician
  • Seattle, WA
National Provider Identifier
1578673406
Registry record updated Nov 20, 2015
On this page

Key facts

NPPES NPI Registry
Primary specialty
Anesthesiology PhysicianTaxonomy code 207L00000X
License
MD00048257 Issued in WA
Practice address
1229 Madison St
Suite 1440
Seattle, WA 98104-3586
Phone
(206) 625-0578
Fax
(206) 625-9184
NPI assigned
Aug 30, 2006
Last updated
Nov 20, 2015By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Nov 20, 2015

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Anesthesiology Physician 207L00000X MD00048257 WA Primary

Addresses

Primary practice location

1229 Madison St
Suite 1440
Seattle, WA 98104-3586

Mailing address

1229 Madison St
Suite 1440
Seattle, WA 98104-3586
Phone (206) 625-0578

Other identifiers 2

IdentifierTypeStateIssuer
P00649932OtherRAILROAD
8482218MedicaidWA

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in WA
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

Enrollment IDStateProvider typePAC IDDetails
I20070706000420 WA Practitioner - Anesthesiology 1850491762 Reassigns benefits to 4 organizations

Care Compare profile

Medicare Care Compare
Specialty
Anesthesiology
Education
Tulane University School of Medicine, 2003
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Virginia Mason Medical CenterGroup PAC ID 9830002617, 867 clinicians
Franciscan Medical GroupGroup PAC ID 0547173866, 1,400 clinicians

Practice addresses (Care Compare)

1100 9TH Ave
Seattle, WA 98101-2756
Phone (206) 223-6600

1229 Madison St
Suite 1440
Seattle, WA 98104-3538
Phone (206) 625-0578

1717 S J St
Tacoma, WA 98405-4933
Phone (253) 426-6341

5300 Tallman Ave NW
Seattle, WA 98107-3932
Phone (206) 386-2742

751 NE Blakely Dr
Issaquah, WA 98029-6201
Phone (206) 386-2742

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled
HHS exclusion list flag
CMS’s directory marks this NPI as on an HHS exclusion list; no matching OIG record was found. The OIG exclusions file (LEIE) holds no record for this NPI, and the directory does not say which list the flag comes from. How exclusions are shown Confirm with the OIG exclusions search.
Credentials
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
Virginia Mason Medical Center CurrentSince Sep 1, 2025 Accepting new patients
Virginia Mason Medical Center Current Accepting new patients
Franciscan Medical Group CurrentSince Dec 10, 2023 Accepting new patients
Capital Medical Center Specialty Physicians, LLC CurrentSince Aug 22, 2023 Accepting new patients
Virginia Mason Medical Center CurrentSince Sep 1, 2025 Accepting new patients
Franciscan Medical Group CurrentSince Dec 10, 2023 Accepting new patients
Western Washington Medical Group, Inc, PS CurrentSince Mar 17, 2008 Accepting new patients
Physicians Anesthesia Service PLLC Anesthesiology CurrentSince Mar 17, 2008 Accepting new patients
Milford Anesthesia Associates LLC Anesthesiology PastSince Sep 25, 2019 Accepting new patients
Northwest Anesthesiologists, PS Anesthesiology Past Accepting new patients

Locations

380 Winslow Way E
Bainbridge Island, WA 98110
Phone (206) 842-5632

16251 Sylvester Rd SW
Burien, WA 98166
Phone (206) 244-9970

34503 9th Ave S
Ste 130
Federal Way, WA 98003
Phone (253) 835-5340

3900 Capital Mall Dr SW
Olympia, WA 98502
Phone (360) 704-4743

925 Seneca St
Seattle, WA 98101
Phone (206) 341-0860

600 Broadway
Ste 270
Seattle, WA 98122
Phone (206) 381-0269

1229 Madison St
Ste 1440
Seattle, WA 98104
Phone (206) 625-0578

1100 9th Ave
Seattle, WA 98101
Phone (206) 223-6980

1717 S J St
Tacoma, WA 98405
Phone (253) 426-4101

1812 S J St
Ste 120
Tacoma, WA 98405
Phone (253) 428-2200

Organizations & group practices 10

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

Hospital & facility affiliations 3

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

NPI Registry JSON

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

{
    "created_epoch": "1156896000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1447977600000",
    "number": "1578673406",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1229 MADISON ST",
            "address_2": "SUITE 1440",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981043586",
            "telephone_number": "206-625-0578",
            "fax_number": "206-625-9184"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1229 MADISON ST",
            "address_2": "SUITE 1440",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981043586",
            "telephone_number": "206-625-0578",
            "fax_number": "206-625-9184"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "FROHN",
        "first_name": "ROSS",
        "middle_name": "HEDLUND",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-08-30",
        "last_updated": "2015-11-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "WA",
            "license": "MD00048257",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD",
            "identifier": "P00649932",
            "state": null
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "8482218",
            "state": "WA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Seattle, WA

Sources for this page

Verify at the official NPI Registry.