Geoffrey Colby, M.D., PH.D.
NPI 1144373739 · Neurological Surgery Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Neurosurgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Geoffrey Colby, M.D., PH.D. is a Neurological Surgery Physician provider in Los Angeles, CA (NPI 1144373739).
Provider details
- NPI number
- 1144373739
- Entity type
- Individual
- Primary specialty
- Neurological Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 74356 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
400 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 115 | $132 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 45 | $186 |
| Ultrasonic Guidance for Blood Vessel Access76937 | 34 | $14 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 32 | $233 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 30 | $87 |
| Imaging of Blood Vessel75898 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$117,874 across 118 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 6567 E Carondelet Dr Ste 305Tucson, AZ 85710-6160Phone: (520) 881-8400
- 757 Westwood PlzLos Angeles, CA 90095-0001Phone: (310) 301-6800Fax: (310) 794-9035
- 27235 Tourney Rd Ste 2500Valencia, CA 91355-5908Phone: (310) 825-5111Fax: (310) 825-7245
Registry dates
- Enumerated
- 2007-01-19
- Last updated
- 2025-06-27
- Certified
- 2025-06-27
Frequently asked questions
- What is Geoffrey Colby's NPI number?
- Geoffrey Colby's National Provider Identifier (NPI) is 1144373739, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Geoffrey Colby's specialty?
- Geoffrey Colby is listed in the NPPES registry with a primary specialty of Neurological Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Geoffrey Colby located?
- Geoffrey Colby's practice location on file with NPPES is 300 Medical Plaza, Los Angeles, CA 90095-0001.
- What is Geoffrey Colby's phone number?
- The practice phone number listed in the NPPES registry for Geoffrey Colby is (310) 825-5111.
- Does Geoffrey Colby accept Medicare?
- Geoffrey Colby is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Geoffrey Colby's NPI active?
- Yes — Geoffrey Colby's NPI (1144373739) is active in the NPPES registry as of the last update on 2025-06-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.