Christopher A Walter, D.O.

Primary specialty

Orthopaedic Surgery PhysicianTaxonomy code 207X00000X

License

20A10826 Issued in CA

Practice address

347 Andrieux St
Sonoma, CA 95476-6811

Phone

(707) 721-8830

NPI assigned

Mar 3, 2008

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

Electronic endpoints 2

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

Orthopedic Surgery

Education

College of Osteopathic Physicians and Surgeons of Los Angeles, 2004

Medicare assignment

May accept Medicare assignment

Group practices

Regents Univ of California UCSFGroup PAC ID 6305160300, 276 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Sonoma Valley Hospital Hospital, Sonoma, CA, CCN 050090
• Marinhealth Medical Center Hospital, Greenbrae, CA, CCN 050360
• Petaluma Valley Hospital Hospital, Petaluma, CA, CCN 050136
• Providence Queen of the Valley Medical Center Hospital, Napa, CA, CCN 050009

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: cwalter348499@direct-ucsfmedicalcenter.org
• Direct secure messaging: cwalter1658432@oc.providencedirect.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.

• Regents Univ of California UCSF

  • Internal Medicine Physician
  • San Francisco, CA
  • NPI 1124439807

  Orthopaedic Surgery

  Medicare reassignment Care Compare group NPD

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

• Marin General Hospital

  • General Acute Care Hospital
  • Greenbrae, CA
  • NPI 1396725677
  Care Compare affiliation
• Norcal Healthconnect LLC

  • General Acute Care Hospital
  • Petaluma, CA
  • NPI 1235162645
  Care Compare affiliation
• Sonoma Valley Health Care District

  • General Acute Care Hospital
  • Sonoma, CA
  • NPI 1710063870
  Care Compare affiliation
• St. Joseph Health Northern California, LLC

  • General Acute Care Hospital
  • Napa, CA
  • NPI 1013080084
  Care Compare affiliation
• St. Joseph Health Northern California, LLC

  • General Acute Care Hospital
  • Napa, CA
  • NPI 1235218785
  Care Compare affiliation

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

{
    "created_epoch": "1204502400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1773360000000",
    "number": "1447420732",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "347 ANDRIEUX ST",
            "city": "SONOMA",
            "state": "CA",
            "postal_code": "954766811",
            "telephone_number": "707-721-8830",
            "fax_number": "707-938-3076"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "347 ANDRIEUX ST",
            "city": "SONOMA",
            "state": "CA",
            "postal_code": "954766811",
            "telephone_number": "707-721-8830"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "335 S McDowell Blvd",
            "address_purpose": "LOCATION",
            "city": "Petaluma",
            "state": "CA",
            "postal_code": "949543507",
            "country_code": "US",
            "telephone_number": "707-721-8830",
            "fax_number": "707-938-3076",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WALTER",
        "first_name": "CHRISTOPHER",
        "middle_name": "A",
        "credential": "D.O.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2008-03-03",
        "last_updated": "2026-03-13",
        "certification_date": "2026-03-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "CA",
            "license": "20A10826",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "cwalter1658432@oc.providencedirect.org",
            "affiliation": "N",
            "address_1": "1496 Professional Dr Ste 601",
            "city": "Petaluma",
            "state": "CA",
            "country_code": "US",
            "postal_code": "949546698",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "cwalter1658432@oc.providencedirect.org",
            "affiliation": "N",
            "address_1": "121 Sotoyome St Ste 101",
            "city": "Santa Rosa",
            "state": "CA",
            "country_code": "US",
            "postal_code": "954054834",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Dennis James Verducci, MD
• Robin Lynn Viratos, PTA
• Phylis Jane Wakefield, PH.D.
• Katherine E Walker, MD
• Walter C. Prehn M.D. a Professional Corporation
• Kristie Kesel Walthard, M.A.
• Amanda Rose Wanag, ASW
• Phuntsok Wangyal
• Susan Eleanor Warnock-Brooks, MFT AND LEP
• Kenneth Waters, RN, PHN

• Orthopaedic Surgery Physician in Sonoma, CA
• Providers in Sonoma, CA by specialty
• Orthopaedic Surgery Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 13, 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.