NEVVI Medicare utilization intelligence

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COLBY, GEOFFREYM.D., PH.D. NPI 1144373739 Clinician

Neurosurgery · LOS ANGELES, CA

Specialty Neurosurgery — from billed Medicare claims
Trained Notify me at launch →
In practice Notify me at launch →
Location Notify me at launch →
Active in data Billed Medicare 2020–2024 (5 consecutive years)
Scale 13 codes billed · 400 disclosed volume (CY2024 — most recent year in data)
Current groups
member of 2 groups; the volumes below are this clinician's personal volume and are not attributed to any single group
Hospital affiliations
  • RONALD REAGAN UCLA MEDICAL CENTER · Hospital · CCN 050262
  • SANTA MONICA - UCLA MED CTR & ORTHOPAEDIC HOSPITAL · Hospital · CCN 050112
  • ST JOSEPH'S HOSPITAL · Hospital · CCN 030011
registry affiliations from the CMS Doctors & Clinicians facility file — an administrative affiliation, not a statement about where care is delivered

Group affiliation since 2019

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Membership spans across every group on this clinician's 2019+ registry record, departed groups included. Membership spans only — no volume is attributed to any group here.

NPPES registry · CMS Doctors & Clinicians registry · Medicare Part B physician/supplier claims · NPPES record last updated 2025-06
Data year CY2024 CY2023 CY2022  CY2021  CY2020 

Provider overview · all codes · CY2024

The full analytics for this provider

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The full billed-volume analytics for this provider — its position among specialty peers, practice focus, and the payments behind it — computed from the same disclosed Medicare Part B data.

This provider's disclosed submitted charges across all codes were in CY2024. Included with Platform.

  • Charge, service & beneficiary totals — the disclosed scale, all codes
  • Practice profile — focus & reach — top codes by share of services
  • Office vs. facility setting mix — place-of-service code split
  • Peer positioning — service volume — percentile among specialty peers, cohort & year disclosed
  • Peer positioning — code breadth — how many codes billed, vs peers

Peer positioning shows billed-volume and code-breadth positions among specialty peers, not measures of care (a provider's true volume position can only be higher, never lower). All figures disclosed Medicare Part B fee-for-service; volumes are personal to this NPI, not attributed to any group.

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Procedures billed to Medicare Part B (2024)

Medicare Part B FFS · CY2024 · as published by CMS
CodeDescription Volume Beneficiary-episodes Avg charge Avg Medicare payment
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
76937 Ultrasonic guidance for blood vessel access
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more
99213 Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
75898 Imaging of blood vessel
36224 Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
76377 3d radiographic procedure with computerized image postprocessing
36226 Insertion of tube into brain artery for diagnosis or treatment with review by radiologist
99442 Telephone medical discussion with physician, 11-20 minutes
36227 Insertion of tube into external neck artery for diagnosis or treatment with review by radiologist
61624 Occlusion of central nervous system or spinal cord artery

These are this provider's own Medicare Part B fee-for-service volumes (CMS public data). CMS suppresses rows with fewer than 11 beneficiaries, so low-volume codes may be missing entirely — absence is not zero. Beneficiary-episodes count CMS's per-setting beneficiary figures, not unique patients. Average charge and average Medicare payment are weighted by service volume across office and facility settings. Volumes on this page are personal to the NPI and are not attributed to any physician group. See Methods & Sources.