Geoffrey P. Colby, M.D., PH.D.

Primary specialty

Neurological Surgery PhysicianTaxonomy code 207T00000X

License

A149100 Issued in CA

Practice address

300 Medical Plaza
Los Angeles, CA 90095-0001

Phone

(310) 825-5111

Fax

(310) 825-7245

NPI assigned

Jan 19, 2007

Last updated

Jun 27, 2025By the provider in NPPES

Sex

Male

Sole proprietor

Yes

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, AZ2 enrollments

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 2

Specialty

Neurosurgery

Education

Columbia University College of Physicians and Surgeons, 2006

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

The Regents of the University of CaliforniaGroup PAC ID 1355249491, 43 clinicians

Tucson Physician Group Holdings LLCGroup PAC ID 0547560070, 200 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Ronald Reagan UCLA Medical Center Hospital, Los Angeles, CA, CCN 050262
• St Joseph's Hospital Hospital, Tucson, AZ, CCN 030011
• Santa Monica - UCLA Med Ctr & Orthopaedic Hospital Hospital, Santa Monica, CA, CCN 050112
• Lac/Harbor-UCLA Med Center Hospital, Torrance, CA, CCN 050376

Merit-based Incentive Payment System (MIPS)

Final score

83.91 of 100Reported as group

Quality

68.73

Promoting interoperability

100

Improvement activities

40

Cost

63.4

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine, Doctor of Philosophy

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: gcolby542644@direct.uclahealth.org
• FHIR API: https://fhir-myrecord.cerner.com/r4/MmWbh382tKlbvAIA1_DeLlIjYVSwroch/
• Direct secure messaging: geoffrey.colby.1@600.direct.athenahealth.com

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.

• The Regents of the University of California

  dba UCLA Neurosurgery Associates

  • Neurological Surgery Physician
  • Los Angeles, CA
  • NPI 1538125844
  Medicare reassignment Care Compare group NPD
• Tucson Physician Group Holdings, LLC

  dba Carondelet Medical Group

  • Interventional Cardiology Physician
  • Tucson, AZ
  • NPI 1356726939
  Medicare reassignment Care Compare group NPD
• UCLA Radiology Medical Group

  • Diagnostic Radiology Physician
  • Los Angeles, CA
  • NPI 1881670248
  Medicare reassignment NPD
• VHS Outpatient Clinics, Inc.

  dba Abrazo Medical Group

  • Multi-Specialty Clinic/Center
  • Goodyear, AZ
  • NPI 1912979964
  Medicare reassignment NPD
• The Regents of the University of California

  dba UCLA Neurosurgery Associates

  • Durable Medical Equipment & Medical Supplies
  • Los Angeles, CA
  • NPI 1447027677

  Neurological Surgery

  NPD
• VHS Outpatient Clinics, Inc.

  dba Arizona Sports Medicine Center (ASMC)

  • Durable Medical Equipment & Medical Supplies
  • Scottsdale, AZ
  • NPI 1891302790
  NPD
• Regents Univ of Calif Los Angeles

  dba Resnick Neuropsychiatric Hospital at UCLA

  • Psychiatric Hospital
  • Los Angeles, CA
  • NPI 1952308363
  NPD (past)
• The Regents of the University of California

  dba Santa Monica UCLAMC and Orthopedic Hospital

  • General Acute Care Hospital
  • Santa Monica, CA
  • NPI 1982849105
  NPD (past)
• UCLA Medical Group

  • Internal Medicine Physician
  • Los Angeles, CA
  • NPI 1043427248
  NPD (past)
• Carondelet Health Network

  dba St. Mary's Hospital

  • General Acute Care Hospital
  • Tucson, AZ
  • NPI 1396835138
  NPD (past)
• Frederick Health Hospital Inc

  dba Frederick Health Hospital

  • General Acute Care Hospital
  • Frederick, MD
  • NPI 1538165527
  NPD (past)
• VHS Acquisition Subsidiary Number 1 Inc

  dba Abrazo Scottsdale Campus

  • General Acute Care Hospital
  • Phoenix, AZ
  • NPI 1326022732
  NPD (past)

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

• County of Los Angeles

  dba LAC Harbor UCLA Medical Center

  • General Acute Care Hospital
  • Torrance, CA
  • NPI 1477574838
  Care Compare affiliation
• Regents of the Univ of California

  dba Santa MonicaUCLAMC and Orthopedic Hospital

  • General Acute Care Hospital
  • Santa Monica, CA
  • NPI 1427055839
  Care Compare affiliation
• Regents Univ of Calif Los Angeles

  dba Ronald Reagan UCLA Medical Center

  • General Acute Care Hospital
  • Los Angeles, CA
  • NPI 1902803315
  Care Compare affiliation
• SMSJ Tucson Holdings LLC

  dba St. Josephs Hospital

  • General Acute Care Hospital
  • Tucson, AZ
  • NPI 1538535158
  Care Compare affiliation

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

{
    "created_epoch": "1169164800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1750982400000",
    "number": "1144373739",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 22224",
            "city": "BELFAST",
            "state": "ME",
            "postal_code": "049154473",
            "telephone_number": "884-027-2568",
            "fax_number": "888-902-1099"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 MEDICAL PLAZA",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900950001",
            "telephone_number": "310-825-5111",
            "fax_number": "310-825-7245"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "757 Westwood Plz",
            "address_purpose": "LOCATION",
            "city": "Los Angeles",
            "state": "CA",
            "postal_code": "900950001",
            "country_code": "US",
            "telephone_number": "310-301-6800",
            "fax_number": "310-794-9035",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "27235 Tourney Rd Ste 2500",
            "address_purpose": "LOCATION",
            "city": "Valencia",
            "state": "CA",
            "postal_code": "913555908",
            "country_code": "US",
            "telephone_number": "310-825-5111",
            "fax_number": "310-825-7245",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "6567 E Carondelet Dr Ste 305",
            "address_purpose": "LOCATION",
            "city": "Tucson",
            "state": "AZ",
            "postal_code": "857106160",
            "country_code": "US",
            "telephone_number": "520-881-8400",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "COLBY",
        "first_name": "GEOFFREY",
        "middle_name": "P.",
        "name_prefix": "Dr.",
        "credential": "M.D., PH.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2007-01-19",
        "last_updated": "2025-06-27",
        "certification_date": "2025-06-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207T00000X",
            "taxonomy_group": "",
            "desc": "Neurological Surgery",
            "state": "AZ",
            "license": "74356",
            "primary": false
        },
        {
            "code": "207T00000X",
            "taxonomy_group": "",
            "desc": "Neurological Surgery",
            "state": "CA",
            "license": "A149100",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ramona G Colbert, LAC.
• Thomas Colbert
• Melissa Colbourne
• Brandon Ross Colby, M.D.
• Filandra Colby, ASW #106051
• Cole J Marta MD Inc (California Center for Psychedelic Therapy)
• Cole Vision Corporation
• Ajima Cole
• Andrew Cole, BOCCTHY
• Chelsea Cole, AU.D.

• Neurological Surgery Physician in Los Angeles, CA
• Providers in Los Angeles, CA by specialty
• Neurological Surgery Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 27, 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.