Mariann Williams, NP

Primary specialty

Nurse PractitionerTaxonomy code 363L00000X

License

AP30003589 Issued in WA

Practice address

118 S Whitcomb Ave
Tonasket, WA 98855-9287

Phone

(509) 486-3191

Fax

(509) 223-1743

NPI assigned

Dec 5, 2006

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Other identifiers 2

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: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Nurse Practitioner

Education

Other, 1994

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Okanogan County Public Hospital Dist No 4Group PAC ID 9335051150, shared by 4 NPIs, 43 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• North Valley Hospital Hospital, Tonasket, WA, CCN 501321

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Locations

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.

• Okanogan County Public Hospital Dist No 4

  • Critical Access Hospital
  • Tonasket, WA
  • NPI 1164580700
  Medicare reassignment NPD
• Okanogan County Public Hospital Dist No 4

  • Medical Specialty Clinic/Center
  • Tonasket, WA
  • NPI 1750443834
  Medicare reassignment NPD
• Okanogan County Public Hospital Dist No 4

  • Rural Health Clinic/Center
  • Tonasket, WA
  • NPI 1811555931
  NPD

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

• Okanogan County Public Hospital Dist No 4

  • Critical Access Hospital
  • Tonasket, WA
  • NPI 1164580700
  Care Compare affiliation

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

{
    "created_epoch": "1165276800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1764806400000",
    "number": "1922166776",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "203 S WESTERN AVE",
            "city": "TONASKET",
            "state": "WA",
            "postal_code": "988558803",
            "telephone_number": "509-486-3191",
            "fax_number": "509-223-1743"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "118 S WHITCOMB AVE",
            "city": "TONASKET",
            "state": "WA",
            "postal_code": "988559287",
            "telephone_number": "509-486-3191",
            "fax_number": "509-223-1743"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMS",
        "first_name": "MARIANN",
        "credential": "NP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-12-05",
        "last_updated": "2025-12-04",
        "certification_date": "2025-12-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "WA",
            "license": "RN00056504",
            "primary": false
        },
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "WA",
            "license": "AP30003589",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "L&I",
            "identifier": "0306262",
            "state": "WA"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "1922166776",
            "state": "WA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Helen Walker
• Toni Sheree Waller, ARNP
• Rebecca Waxman
• Wenatchee Valley Hospital
• Kevin James Williams, RN
• Tia Elizabeth Wold, DPT
• Nancy K Woodruff, OTR/L
• Zhuwei Chen D.M.D. , P.S.

• Nurse Practitioner in Tonasket, WA
• Providers in Tonasket, WA by specialty
• Nurse Practitioner in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 4, 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.