Peter Zajac, DO

Primary specialty

Surgery PhysicianTaxonomy code 208600000X

License

OP61502695 Issued in WA

Practice address

1550 S Pioneer Way
Moses Lake, WA 98837-4613

Phone

(509) 793-9792

Fax

(509) 764-3287

NPI assigned

May 24, 2019

Last updated

May 4, 2026By the provider in NPPES

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 1

Electronic endpoints 1

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

Specialty

General Surgery

Education

Edward Via Col of Osteo Medicine-Virginia Campus, 2019

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Grant County Public Hospital District 1Group PAC ID 9931095692, 112 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Samaritan Hospital Hospital, Moses Lake, WA, CCN 500033

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: pzajac4015631@wm.providencedirect.org
• Direct secure messaging: pzajac787687@direct.multicare.org

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.

• Grant County Public Hospital District 1

  dba Samaritan Clinic

  • Rural Health Clinic/Center
  • Moses Lake, WA
  • NPI 1619086766
  Medicare reassignment Care Compare group NPD
• Multicare Health System

  dba Multicare Neurological Surgery

  • Neurological Surgery Physician
  • Tacoma, WA
  • NPI 1497766638
  Medicare reassignment NPD
• Grant County Public Hospital District 1

  dba Samaritan Clinic on Patton

  • Rural Health Clinic/Center
  • Moses Lake, WA
  • NPI 1609112739
  NPD
• Grant County Public Hospital District 1

  dba Samaritan

  • General Acute Care Hospital
  • Moses Lake, WA
  • NPI 1902818883
  NPD
• Multicare Health System

  dba MultiCare Rockwood Lab

  • Clinical Medical Laboratory
  • Tacoma, WA
  • NPI 1154818326
  NPD
• Multicare Health System

  dba MultiCare Deaconess Retail Pharmacy

  • Community/Retail Pharmacy
  • Spokane, WA
  • NPI 1396594875
  NPD
• Grant County Public Hospital District 1

  dba Samaritan Hospitalist Group

  • Hospitalist Physician
  • Moses Lake, WA
  • NPI 1053981910
  NPD (past)

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

• Grant County Public Hospital District 1

  dba Samaritan

  • General Acute Care Hospital
  • Moses Lake, WA
  • NPI 1902818883
  Care Compare affiliation

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

{
    "created_epoch": "1558656000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1777852800000",
    "number": "1477110419",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1616 S PIONEER WAY",
            "city": "MOSES LAKE",
            "state": "WA",
            "postal_code": "988372487",
            "telephone_number": "509-793-9715",
            "fax_number": "509-764-3244"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1550 S PIONEER WAY",
            "city": "MOSES LAKE",
            "state": "WA",
            "postal_code": "988374613",
            "telephone_number": "509-793-9792",
            "fax_number": "509-764-3287"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ZAJAC",
        "first_name": "PETER",
        "name_prefix": "Dr.",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-05-24",
        "last_updated": "2026-05-04",
        "certification_date": "2026-05-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208600000X",
            "taxonomy_group": "",
            "desc": "Surgery",
            "state": "WA",
            "license": "OP61502695",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "2291811",
            "state": "WA"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "pzajac4015631@wm.providencedirect.org",
            "affiliation": "N",
            "endpointDescription": "EPIC EMR",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "1550 S Pioneer Way",
            "city": "Moses Lake",
            "state": "WA",
            "country_code": "US",
            "postal_code": "988374613",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Yoshimi Yamamoto, RN NURSE
• Matt E Yawney, O.D.
• Amy Mychal Young, SLP
• Alyssa Ann Yruegas, MASS.MA.60895773
• Tony E Yusuf, M.D.
• Maira Yanet Zaragoza
• Brian B Zhao
• Kristen Sue Ziegler-Horwath, MSN, ARNP, CNM

• Surgery Physician in Moses Lake, WA
• Providers in Moses Lake, WA by specialty
• Surgery Physician in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 4, 2026; 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.