Reilly Owen Loomis, PA-C

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

PA56705 Issued in CA

Practice address

300 Pasteur Dr
Stanford, CA 94305-2200

Phone

(650) 723-4000

NPI assigned

Jul 12, 2016

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

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: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Physician Assistant

Education

Other, 2016

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Stanford Health CareGroup PAC ID 6709797491, 3,152 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Stanford Health Care Tri-Valley Hospital, Pleasanton, CA, CCN 050283
• Stanford Health Care Hospital, Stanford, CA, CCN 050441

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: rloomis454078@hisp.ehr.sutterhealth.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.

• Stanford Health Care

  • General Acute Care Hospital
  • Stanford, CA
  • NPI 1437292927
  Medicare reassignment Care Compare group NPD (past)
• Sutter Bay Medical Foundation

  • Multi-Specialty Clinic/Center
  • Palo Alto, CA
  • NPI 1013950807
  Medicare reassignment NPD
• Sutter Bay Medical Foundation

  • Ambulatory Surgical Clinic/Center
  • Los Altos, CA
  • NPI 1568851327
  Medicare reassignment NPD
• Sutter Bay Medical Foundation

  • Ambulatory Surgical Clinic/Center
  • Mountain View, CA
  • NPI 1982845186
  Medicare reassignment NPD
• Sutter Bay Medical Foundation

  • Ambulatory Surgical Clinic/Center
  • Palo Alto, CA
  • NPI 1104067115
  Medicare reassignment
• Sutter Bay Medical Foundation

  • Ambulatory Surgical Clinic/Center
  • Fremont, CA
  • NPI 1497996524
  Medicare reassignment
• Zevah Corp

  • Orthopaedic Surgery Physician
  • Burlingame, CA
  • NPI 1275266702
  Medicare reassignment
• Stanford Health Care

  • Radiation Oncology Physician
  • Pleasanton, CA
  • NPI 1124561758
  NPD
• Stanford Health Care

  • Specialty Pharmacy
  • Mountain View, CA
  • NPI 1760366132
  NPD
• Sutter Bay Medical Foundation

  • Ambulatory Surgical Clinic/Center
  • San Carlos, CA
  • NPI 1164840088
  NPD
• Sutter Bay Medical Foundation

  • Ambulatory Surgical Clinic/Center
  • Fremont, CA
  • NPI 1306241534
  NPD
• Sutter Bay Medical Foundation

  • Clinical Medical Laboratory
  • Santa Clara, CA
  • NPI 1669287033
  NPD

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

• Stanford Health Care

  • Radiation Oncology Physician
  • Pleasanton, CA
  • NPI 1124561758

  Hospital

  Care Compare affiliation
• Stanford Health Care

  • General Acute Care Hospital
  • Emeryville, CA
  • NPI 1275076325
  Care Compare affiliation
• Stanford Health Care

  • General Acute Care Hospital
  • Emeryville, CA
  • NPI 1285177337
  Care Compare affiliation
• Stanford Health Care

  • General Acute Care Hospital
  • Stanford, CA
  • NPI 1437292927
  Care Compare affiliation
• Stanford Health Care

  • General Acute Care Hospital
  • Pleasanton, CA
  • NPI 1467990465
  Care Compare affiliation
• Stanford Health Care

  • General Acute Care Hospital
  • Stanford, CA
  • NPI 1871543215
  Care Compare affiliation
• Stanford Health Care Tri-Valley

  • General Acute Care Hospital
  • Pleasanton, CA
  • NPI 1144389941
  Care Compare affiliation
• Stanford Life Flight

  • Air Ambulance
  • Stanford, CA
  • NPI 1114063203

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1468281600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1766448000000",
    "number": "1053763284",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "300 PASTEUR DR",
            "city": "STANFORD",
            "state": "CA",
            "postal_code": "943052200",
            "telephone_number": "650-723-4000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 PASTEUR DR",
            "city": "STANFORD",
            "state": "CA",
            "postal_code": "943052200",
            "telephone_number": "650-723-4000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "LOOMIS",
        "first_name": "REILLY",
        "middle_name": "OWEN",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2016-07-12",
        "last_updated": "2025-12-23",
        "certification_date": "2025-12-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363AS0400X",
            "taxonomy_group": "",
            "desc": "Physician Assistant, Surgical",
            "state": "CA",
            "license": "PA56705",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "CA",
            "license": "PA56705",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Billy W Loo, MD, PHD
• Kimberly Leticia Loo, MD
• Sheri Ann Loo, NP
• Kendra Lynn Look, DNP
• Bradley Dean Loomis, MD
• Victoria Lynn Loomis, P.T.
• Danielle Lopez, DNP
• Evelyn E Lopez, CNS, NP
• Gwen Elizabeth Lopez, MS,CGC
• Jaime Rodriguez Lopez, MD

• Physician Assistant in Stanford, CA
• Providers in Stanford, CA by specialty
• Physician Assistant in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 23, 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.