NEVVI Medicare utilization intelligence

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THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

PAC 1355249491 Physician group
NEUROSURGERY · LOS ANGELES, CA · hospital-affiliated
Specialty NEUROSURGERY — most common member specialty (multi-specialty groups carry one label; see Methods)
Footprint Registered in LOS ANGELES, CA · bills Medicare in 2 states (CA, NC)
Scale 46 providers on the CMS registry roster · 60 codes billed (five-year data window) · 5,574 volume (all billed codes, CY2024)
Medicare paid $856K · across all billed codes, CY2024, attributed & disclosed
Affiliation Hospital-affiliated — at least one member holds a hospital affiliation in the CMS registry
Contact (310) 825-5111 — CMS registry listing
CMS Doctors & Clinicians registry · Medicare Part B physician/supplier claims · figures are attributed (single-group clinicians) and disclosed fee-for-service — a subset, never complete totals · group series shown over the most recent 5 years (rosters archived from 2019)
Group analytics

Who's billing in this group, plus the paid volume analytics · CY2024

Clinician makeup · CY2024
Physicians 22Advanced-practice 14Other clinicians 0= 36 clinicians billed · CY2024
By clinician headcount, CY2024. 'Physician' follows Medicare's §1861(r) definition (MD/DO, podiatry, optometry, dental medicine, chiropractic); facility and supplier enrollments are not counted as clinicians. These 36 are the clinicians who billed in CY2024 — a subset of the all-time registry roster shown on the group's identity card.

Billed 38 of the group's 60 codes this year, across 1 state (CY2024).

The full analytics for this group

Premium

The billed-volume rank, trajectory, and economics behind this group — computed on the same disclosed Medicare Part B data.

What Medicare paid this group in CY2024 is on the group's identity card — free, on every tier. Premium breaks that figure down per code and per service, and puts the volume behind it in national and peer context.

  • Per-code payment breakdown & avg $/service — dollars behind the volume
  • Beneficiary-episode volume — reach, not just service counts
  • Office vs. facility setting mix — place-of-service code split
  • National billed-volume rank — percentile, cohort & year disclosed
  • Size-peer billed-volume benchmark — vs. groups of similar size
  • Top-3 clinician share — how volume distributes
  • 5-year volume trend — direction across the window
  • Business mix — largest codes by payment

Rank and benchmark figures are billed-volume positions among peers, not measures of care. All figures attributed (single-group clinicians) and disclosed Medicare Part B fee-for-service.

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Medicare Part B FFS · CY2024 · as published by CMS

Provider volumes, all codes · CY2024

NPIProviderCredentialsTypeCitySt Volume (all codes) locked column
1790046720 Vivas, Andrew M.D. Neurosurgery ValenciaCA premium
1942355854 Dorsi, Michael MD Neurosurgery Thousand OaksCA premium
1679090393 Abeloe, Jenna NP Nurse Practitioner VenturaCA premium
1508022997 Kim, Won Neurosurgery Los AngelesCA premium
1427025303 Shpiner, Robert M.D. Internal Medicine Los AngelesCA premium
1316150600 Ghostine, Samer M.D.,M.S. Neurosurgery Los AngelesCA premium
1437392776 Bari, Ausaf MD PHD Neurosurgery Los AngelesCA premium
1063437192 Holly, Langston MD Neurosurgery Los AngelesCA premium
1255793725 Patel, Kunal MD Neurosurgery Los AngelesCA premium
1538775093 Lee, David Nurse Practitioner Los AngelesCA premium
1164075289 Pastorelli, Jenna MSN-FNP Nurse Practitioner Santa MonicaCA premium
1457585903 Lu, Daniel M.D. Neurosurgery Santa MonicaCA premium
1831641117 Rhodes, Claire Nurse Practitioner Los AngelesCA premium
1568963809 Byers, Rachel MS, NP, AGACNP-BC Nurse Practitioner Los AngelesCA premium
1467742213 Everson, Richard MD Neurosurgery Los AngelesCA premium
1831391028 Wang, Anthony MD Neurosurgery Los AngelesCA premium
1124220231 Johnson, Jeremiah M.D. Neurosurgery Los AngelesCA premium
1174502629 Bergsneider, Marvin MD Neurosurgery Los AngelesCA premium
1225549082 Park, Lisa NP Nurse Practitioner Los AngelesCA premium
1780157032 Tchicaya, Ana NP Nurse Practitioner Los AngelesCA premium
1346568094 Orloff, Tatiana Nurse Practitioner Los AngelesCA premium
1861912768 Said, Vickey MSN, ACUTE CARE NP Nurse Practitioner Los AngelesCA premium
1427549146 Real, Courtney NP Nurse Practitioner Los AngelesCA premium
1669599197 Yang, Isaac M.D. Neurosurgery San FranciscoCA premium
1255785374 Newman, Maya MD, MS Physical Medicine and Rehabilitation Los AngelesCA premium
1962752006 Billingslea-Yoon, Emma Nurse Practitioner Los AngelesCA premium
1417039694 Choi, Jin Sun PA Physician Assistant Los AngelesCA premium
1861417834 Liau, Linda MD Neurosurgery Los AngelesCA premium
1376950477 Fallah, Aria MD, MSC Neurosurgery Los AngelesCA premium
1033386537 Buitrago Blanco, Manuel · member of 2 groups M.D, PH.D. Neurology Los AngelesCA premium
1144373739 Colby, Geoffrey · member of 2 groups M.D., PH.D. Neurosurgery Los AngelesCA premium
1326184896 Freeman, Darren · member of 2 groups D.O. Physical Medicine and Rehabilitation EncinoCA premium
1770763740 Lekovic, Gregory · member of 2 groups MD Neurosurgery BurbankCA premium
1982790085 Reider-Demer, Melissa · member of 2 groups PNP Nurse Practitioner Los AngelesCA premium
1992716435 Vespa, Paul · member of 2 groups MD Neurology Los AngelesCA premium
1841207560 Wherry, Carl · member of 2 groups NP Nurse Practitioner Los AngelesCA premium

Volumes are attributed to a group only for clinicians affiliated with exactly one group. Clinicians in several groups are listed ("member of N groups") but shown as "—" — their volume is not attributed to any single group. A "—" on a single-group clinician means CMS suppressed the figure (fewer than 11 beneficiaries), never zero. Beneficiary-episodes count CMS's per-setting beneficiary figures, not unique patients. Average Medicare payment is the amount Medicare actually paid per service, weighted by service volume across office and facility settings. Where the roster is a single clinician, that clinician's service counts match the group's attributed volume shown on the ranked results, so they are shown here; the per-provider split across a larger roster is a premium feature. See Methods & Sources.