REGENTS OF THE UNIVERSITY OF
EMERGENCY MEDICINE · ORANGE, CA · 126 providers · hospital-affiliated · (714) 456-7004
Provider volumes, all codes · CY2024
Group overview · all codes · CY2024
All figures are attributed (single-group clinicians only) and disclosed (CMS suppresses fewer-than-11-beneficiary rows) Medicare Part B fee-for-service — a subset, never complete totals. Percentile and peer figures are billed-volume positions, not statements about care. See Methods & Sources.
| NPI | Provider | Credentials | Type | City | St | Services (all codes) |
|---|---|---|---|---|---|---|
| 1699068601 | Keenan, Peter | MD | Emergency Medicine | Los Alamitos | CA | premium |
| 1861998049 | Dang, Eric | MD | Emergency Medicine | Orange | CA | premium |
| 1144256355 | Perlman, Michael | M.D. | Emergency Medicine | Los Alamitos | CA | premium |
| 1427200344 | Prince, Erin | DO | Emergency Medicine | Camden | NJ | premium |
| 1053808170 | Jean, Joseph | MD | Emergency Medicine | Los Alamitos | CA | premium |
| 1740772383 | Icasiano, Herbert | DO | Emergency Medicine | Los Alamitos | CA | premium |
| 1235507724 | Evans, Justin | Emergency Medicine | Lakewood | CO | premium | |
| 1952330938 | Calder, Kirsten | MD | Emergency Medicine | Los Alamitos | CA | premium |
| 1467612580 | Katzer, Robert | M.D. | Emergency Medicine | Orange | CA | premium |
| 1780188136 | Hsu, Edmund | MD | Emergency Medicine | Orange | CA | premium |
| 1841211968 | Tomongin, Christopher | M.D. | Emergency Medicine | Los Alamitos | CA | premium |
| 1326542168 | Matonis, Danielle | MD | Emergency Medicine | Orange | CA | premium |
| 1225590201 | Lewis, Kristin | MD | Emergency Medicine | Orange | CA | premium |
| 1124588058 | Patel, Parth | MD | Emergency Medicine | Orange | CA | premium |
| 1558756734 | Nguyen-Phuoc, Alyssa | M.D. | Emergency Medicine | Orange | CA | premium |
| 1386812543 | Mccoy, Christopher | M.D. | Emergency Medicine | Orange | CA | premium |
| 1093947988 | Joshi, Nikita | MD | Emergency Medicine | Orange | CA | premium |
| 1184681991 | Rokos, Ivan | MD | Emergency Medicine | Los Alamitos | CA | premium |
| 1285131300 | Myatt, Toby | MD | Emergency Medicine | Orange | CA | premium |
| 1285999060 | Algaze-Gonzalez, Isabel | M.D. | Emergency Medicine | Boston | MA | premium |
| 1306929823 | Suchard, Jeffrey | MD | Emergency Medicine | Orange | CA | premium |
| 1770087744 | Gibney, Ryan | MD | Emergency Medicine | Orange | CA | premium |
| 1225018237 | Dosanjh, Kuljinder | P.A. | Physician Assistant | Orange | CA | premium |
| 1699157651 | Koda, Alexis | MD | Emergency Medicine | Philadelphia | PA | premium |
| 1376800219 | Wray, Alisa | M.D. | Emergency Medicine | Orange | CA | premium |
| 1679326383 | Amante, Philip | Nurse Practitioner | Orange | CA | premium | |
| 1144259839 | Chakravarthy, Bharath | MD | Emergency Medicine | Orange | CA | premium |
| 1033418801 | Toohey, Shannon | MD | Emergency Medicine | Orange | CA | premium |
| 1427684349 | Walls-Smith, Luke | MD | Emergency Medicine | Orange | CA | premium |
| 1699138255 | Spiegelman, Lindsey | MD | Emergency Medicine | Orange | CA | premium |
| 1730108689 | Kim, Tae Eung | M.D. | Emergency Medicine | Orange | CA | premium |
| 1558716233 | Rivera, Ronald | M.D. | Emergency Medicine | Orange | CA | premium |
| 1225792369 | Doan-Nguyen, Diana | Nurse Practitioner | Costa Mesa | CA | premium | |
| 1730648718 | Stephenson, Graham | MD | Emergency Medicine | Orange | CA | premium |
| 1063894988 | Nguyen, Christina | PA - C | Physician Assistant | Costa Mesa | CA | premium |
| 1831545110 | Smart, Jonathan | Emergency Medicine | Orange, | CA | premium | |
| 1952988925 | Lamparter, Lauren | Emergency Medicine | Orange | CA | premium | |
| 1770666299 | Langdorf, Mark | MD | Emergency Medicine | Orange | CA | premium |
| 1750390993 | Masri, Mina | D.O. | Emergency Medicine | Los Alamitos | CA | premium |
| 1003996257 | Rudkin, Scott | MD | Emergency Medicine | Orange | CA | premium |
| 1770830499 | Duong, Christina | N.P. | Nurse Practitioner | Orange | CA | premium |
| 1841879889 | Winger, Allan | MD | Emergency Medicine | Orange | CA | premium |
| 1316386204 | Norris, Teresa | NP | Nurse Practitioner | Lakewood | CA | premium |
| 1205158649 | Santiago, Tonya | NP | Nurse Practitioner | Upland | CA | premium |
| 1992334965 | Abramson, Elijah | MD | Emergency Medicine | Sacramento | CA | premium |
| 1891083804 | Ahn, Kathleen | NP | Nurse Practitioner | Huntington Park | CA | premium |
| 1891322129 | Fuchs, Joshua | DO | Emergency Medicine | Orange | CA | premium |
| 1114156759 | Jonsson, Sheri | NP | Nurse Practitioner | Orange | CA | premium |
| 1891094678 | Mortazavi, Rod | M.D. | Emergency Medicine | Orange | CA | premium |
| 1548276777 | Kim, Jerry | M.D. | Emergency Medicine | Orange | CA | premium |
| 1790925329 | Valesky, Walter | MD | Neurology | Orange | CA | premium |
| 1881214237 | Abido, Kimberly | MSN, APRN, FNP-C | Nurse Practitioner | Orange | CA | premium |
| 1164006946 | Almog, Roy · member of 2 groups | Emergency Medicine | Orange | CA | premium | |
| 1174775449 | Ballinger, Jennifer · member of 2 groups | MD | Emergency Medicine | Brooklyn | NY | premium |
| 1730507575 | Bui, Peter · member of 3 groups | MD | Emergency Medicine | Dekalb | IL | premium |
| 1841877222 | Chan, Chuck · member of 3 groups | DO | Emergency Medicine | Orange | CA | premium |
| 1689606790 | Chapman, James · member of 2 groups | DO | Emergency Medicine | Lakewood | CA | premium |
| 1568982965 | Choi, Daniel · member of 2 groups | MD | Emergency Medicine | Orange | CA | premium |
| 1942732409 | Cisneros, Victor · member of 3 groups | M.D. | Emergency Medicine | Orange | CA | premium |
| 1457857229 | Di, Wai Tan · member of 2 groups | MD | Emergency Medicine | Brooklyn | NY | premium |
| 1033299185 | Fox, John C · member of 3 groups | MD | Emergency Medicine | Orange | CA | premium |
| 1760046353 | Giron, Charles · member of 2 groups | Physician Assistant | Orange | CA | premium | |
| 1457477242 | Glascock, Pooneh · member of 3 groups | M.D. | Emergency Medicine | Cedar Rapids | IA | premium |
| 1245805373 | Gottam, Bhargavesh · member of 2 groups | MD | Emergency Medicine | Orange | CA | premium |
| 1548897903 | Goubert, Ronald · member of 2 groups | Emergency Medicine | Orange | CA | premium | |
| 1215424502 | Guy, Megan · member of 2 groups | MD | Emergency Medicine | Orange | CA | premium |
| 1568058683 | Hanna, Paul · member of 2 groups | PA-C | Physician Assistant | Riverside | CA | premium |
| 1164953857 | Herndon, Alexandra · member of 2 groups | MD | Emergency Medicine | Vancouver | WA | premium |
| 1134603483 | Ho, Hien · member of 3 groups | NP | Nurse Practitioner | Orange | CA | premium |
| 1124552807 | Iteen, Alexander · member of 2 groups | M.D. | Emergency Medicine | Orange | CA | premium |
| 1154688810 | Jen, Maxwell · member of 4 groups | MD | Emergency Medicine | Tustin | CA | premium |
| 1194964387 | Jones, Juan · member of 2 groups | M.D. | Emergency Medicine | Monterey Park | CA | premium |
| 1922636430 | Korn, Ryan · member of 2 groups | MD | Emergency Medicine | Las Vegas | NV | premium |
| 1700058963 | Kumar, Monica · member of 2 groups | M.D, | Emergency Medicine | Los Alamitos | CA | premium |
| 1700463452 | Lew, Kelly · member of 2 groups | Emergency Medicine | San Diego | CA | premium | |
| 1922628023 | Li, Junwei · member of 2 groups | Emergency Medicine | Orange | CA | premium | |
| 1932736527 | Livingston, Joshua · member of 2 groups | MD | Emergency Medicine | Orange | CA | premium |
| 1639281322 | Lotfipour, Shahram · member of 3 groups | M.D. | Emergency Medicine | Orange | CA | premium |
| 1710242128 | Mehta, Akash · member of 2 groups | DO | Emergency Medicine | Los Alamitos | CA | premium |
| 1992382113 | Mireles-Romo, Carina · member of 3 groups | Emergency Medicine | San Diego | CA | premium | |
| 1699032458 | Moradian, Nima · member of 3 groups | D.O. | Emergency Medicine | Orange | CA | premium |
| 1679102925 | Nashu, Madison · member of 2 groups | MD | Emergency Medicine | New Haven | CT | premium |
| 1215519012 | Newland, Allegra · member of 3 groups | MD | Emergency Medicine | Marietta | OH | premium |
| 1841862109 | Ngo, Alexander · member of 2 groups | NP | Nurse Practitioner | Orange | CA | premium |
| 1407367618 | Nguyen, Michelle · member of 2 groups | MD | Emergency Medicine | Orange | CA | premium |
| 1538696836 | Nguyen, Andy · member of 2 groups | M.D. | Emergency Medicine | Orange | CA | premium |
| 1780662023 | Ostovar, Herald · member of 3 groups | M.D. | Emergency Medicine | Rancho Mirage | CA | premium |
| 1538920004 | Patel, Vikkie · member of 2 groups | FNP-BC | Nurse Practitioner | Orange | CA | premium |
| 1770999468 | Patel, Sagar · member of 3 groups | M.D. | Emergency Medicine | Rancho Mirage | CA | premium |
| 1760063234 | Rodriguez, Brieana · member of 3 groups | MD | Emergency Medicine | Orange | CA | premium |
| 1548263015 | Seifi, Amir · member of 2 groups | P.A. | Physician Assistant | Orange | CA | premium |
| 1336570712 | Sesi, Jason · member of 3 groups | PA-C | Physician Assistant | Las Vegas | NV | premium |
| 1467718486 | Shieh, Mason · member of 2 groups | M.D., M.B.A. | Emergency Medicine | Los Alamitos | CA | premium |
| 1144860404 | Shin, Brian · member of 3 groups | PHYSICIAN ASSISTANT | Physician Assistant | Riverside | CA | premium |
| 1164820510 | Thandi, Pardeep · member of 2 groups | M.D. | Emergency Medicine | Orange | CA | premium |
| 1396773990 | Trueba, Daniel · member of 3 groups | M.D. | Emergency Medicine | San Diego | CA | premium |
| 1346556891 | Tseeng, Tze Lyn · member of 2 groups | M.D. | Emergency Medicine | Chicago | IL | premium |
| 1124061296 | Wetzel, Gihan · member of 2 groups | DO | Emergency Medicine | Los Alamitos | CA | premium |
| 1306305388 | Yang, Allen · member of 2 groups | DO | Emergency Medicine | Duarte | CA | premium |
| 1326227232 | Yen, May · member of 2 groups | M.D. | Emergency Medicine | Glendale | CA | premium |
| 1437545019 | Zonnoor, Bobak · member of 3 groups | Emergency Medicine | Brooklyn | NY | 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.