ALAMEDA HEALTH SYSTEM
INTERNAL MEDICINE · OAKLAND, CA · 601 providers · hospital-affiliated · (510) 437-4800
Provider volumes for 99284 — Emergency department visit with moderate level of medical decision making · CY2024
In CY2024, the group billed 210 distinct codes across 14 states to Medicare Part B — 84,213 attributed, disclosed services.
363 clinicians billed under the group: 304 physicians, 57 advanced-practice clinicians, and 2 other clinicians.
'Physician' follows Medicare's definition, which includes doctors of medicine, osteopathy, podiatry, optometry, dental medicine, and chiropractic. 'Advanced-practice clinicians' are nurse practitioners, physician assistants, and similar practitioners; 'other clinicians' covers psychologists, therapists, social workers, audiologists, and dietitians. Facility and supplier enrollments — laboratories, ambulance services, imaging suppliers, and the like — are not counted as clinicians here.
In CY2024, the group's attributed volume on 99284 was 2,873 services across 4 billing states.
| NPI | Provider | Credentials | Type | City | St | 99284 services | Beneficiary-episodes | Avg Medicare payment |
|---|---|---|---|---|---|---|---|---|
| 1801321229 | Aceves, Jorge | M.D. | Emergency Medicine | Alameda | CA | premium | premium | premium |
| 1306555149 | James, Skylar | PHYSICIAN ASSISTANT | Physician Assistant | Oakland | CA | premium | premium | premium |
| 1316583396 | Mccray, Shelby | RN | Nurse Practitioner | Oakland | CA | premium | premium | premium |
| 1669891503 | Hodroge, Sammy | MD | Emergency Medicine | Alameda | CA | premium | premium | premium |
| 1891256814 | Stegeman, Joseph | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1679012678 | Sakaue, Michelle | PA-C | Physician Assistant | Salinas | CA | premium | premium | premium |
| 1215995576 | Macqueen, Marjorie | PA | Physician Assistant | Berkeley | CA | premium | premium | premium |
| 1780216598 | O'brien, Hannah | PA-C | Physician Assistant | Redwood City | CA | premium | premium | premium |
| 1215355052 | Sudario, Gabriel | Emergency Medicine | Orange | CA | premium | premium | premium | |
| 1124090162 | Halloran, Jasmine | PAC | Physician Assistant | Castro Valley | CA | premium | premium | premium |
| 1174053573 | Lien, Ada | PA-C, MPH | Physician Assistant | San Leandro | CA | premium | premium | premium |
| 1710500491 | Hughes, Matthew | MD | Emergency Medicine | San Leandro | CA | premium | premium | premium |
| 1013370865 | Rusoja, Evan | MD, PHD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1104050533 | Stewart, Carly | PA-C | Physician Assistant | Sacramento | CA | premium | premium | premium |
| 1093341661 | Chang, Christine | Physician Assistant | San Jose | CA | premium | premium | premium | |
| 1396306148 | Pierson, Jillian | PA-C | Physician Assistant | San Leandro | CA | premium | premium | premium |
| 1255322558 | Snoey, Eric | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1962540765 | Duong, David | M.D. | Emergency Medicine | San Francisco | CA | premium | premium | premium |
| 1588149199 | Mawlavizada, Farhat | PA-C | Physician Assistant | San Jose | CA | premium | premium | premium |
| 1518915032 | Terry, Michael | PA | Physician Assistant | Oakland | CA | premium | premium | premium |
| 1790362093 | Luong, Ethan | MD | Emergency Medicine | Stockton | CA | premium | premium | premium |
| 1659774966 | Leone, Margaret | PA-C | Physician Assistant | Torrance | CA | premium | premium | premium |
| 1720092620 | Nagdev, Arun | MD | Emergency Medicine | Providence | RI | premium | premium | premium |
| 1699784991 | Sherwood, Kelly | PA | Physician Assistant | Salt Lake City | UT | premium | premium | premium |
| 1154610863 | Tefera, Henok | Physician Assistant | San Francisco | CA | premium | premium | premium | |
| 1467899187 | Gesch, Julie | M.D. | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1205367661 | Glass, Melissa | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1750363727 | Miller, Stephen | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1376534792 | Hinrichsen, Brian | PA | Physician Assistant | Berkeley | CA | premium | premium | premium |
| 1659875920 | Misa, Nana Yaa | MD | Emergency Medicine | San Francisco | CA | premium | premium | premium |
| 1134368772 | Moser, Meg | NP | Nurse Practitioner | Oakland | CA | premium | premium | premium |
| 1497746705 | Perez, Berenice | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1245221548 | White, Douglas | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1801887195 | Reed, Denae | P.A. | Physician Assistant | Oakland | CA | premium | premium | premium |
| 1134360944 | Collins, Jennifer | PHYSICIAN ASSISTANT | Physician Assistant | Jamaica | NY | premium | premium | premium |
| 1932478872 | Anderson, Erik | M.D. | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1588161210 | Liang, Amy | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1285813790 | Bhatt, Sanjay | MD | Emergency Medicine | Los Angeles | CA | premium | premium | premium |
| 1992016323 | Bailey, Caitlin | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1164413456 | Simon, Barry | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1730498718 | Herring, Andrew | M.D. | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1952370694 | Wills, Charlotte | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1407242373 | Gardner, Kevin | Critical Care (Intensivists) | Oakland | CA | premium | premium | premium | |
| 1780107169 | Cusick, Colin | PHYSICIAN ASSISTANT | Physician Assistant | Antioch | CA | premium | premium | premium |
| 1366423410 | Tillim, Jeremy | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1265661813 | Afzali, Edris · member of 2 groups | M.D. | Emergency Medicine | San Leandro | CA | premium | premium | premium |
| 1396308615 | Bascombe, Kristen · member of 2 groups | MD | Emergency Medicine | San Francisco | CA | premium | premium | premium |
| 1134665730 | Bonney, Phillip · member of 2 groups | MD, MS | Neurosurgery | Oklahoma City | OK | premium | premium | premium |
| 1740639442 | Chan, Mark · member of 2 groups | Physician Assistant | Hayward | CA | premium | premium | premium | |
| 1447241765 | Frazee, Bradley · member of 2 groups | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1073074050 | Gao, Bradley · member of 3 groups | MD | Emergency Medicine | Ketchikan | AK | premium | premium | premium |
| 1780903203 | Goltser, Anatoliy · member of 2 groups | MD | Emergency Medicine | Stockton | CA | premium | premium | premium |
| 1205101227 | Gonzales Y Tucker, Richard · member of 5 groups | M.D. | Emergency Medicine | San Francisco | CA | premium | premium | premium |
| 1619471851 | Howell, Kaitlen · member of 2 groups | Emergency Medicine | Oakland | CA | premium | premium | premium | |
| 1013449065 | Humphreys, Caroline · member of 2 groups | Emergency Medicine | Los Angeles | CA | premium | premium | premium | |
| 1528551280 | Huo, Samantha · member of 3 groups | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1598082828 | Losonczy, Lia · member of 2 groups | Emergency Medicine | Washington | DC | premium | premium | premium | |
| 1003128364 | Mantuani, Daniel · member of 2 groups | M.D. | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1538587480 | Martin, David · member of 2 groups | Emergency Medicine | Oakland | CA | premium | premium | premium | |
| 1477948586 | Montgomery, Martha · member of 2 groups | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1699279117 | Moore, Justin · member of 2 groups | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1124406392 | Nguyen, Anthony · member of 2 groups | D.O. | Emergency Medicine | Olympia Fields | IL | premium | premium | premium |
| 1710418942 | Outhay, Malena · member of 3 groups | Emergency Medicine | Oakland | CA | premium | premium | premium | |
| 1891377487 | Patregnani, Michelle · member of 3 groups | Emergency Medicine | Oakland | CA | premium | premium | premium | |
| 1275963100 | Quinones-Rivera, Andrea · member of 2 groups | Emergency Medicine | San Francisco | CA | premium | premium | premium | |
| 1649808072 | Schwimmer, Henry · member of 2 groups | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1255560181 | Semenovskaya, Zina · member of 2 groups | MD | Emergency Medicine | Palo Alto | CA | premium | premium | premium |
| 1124000195 | Singh, Amandeep · member of 2 groups | MD | Emergency Medicine | Oakland | CA | premium | premium | premium |
| 1831150853 | Tam, Yong-Yong · member of 2 groups | M.D. | Emergency Medicine | Alameda | CA | premium | premium | premium |
| 1851612246 | Venegas, Rene · member of 2 groups | M.D. | Emergency Medicine | Bakersfield | CA | premium | premium | premium |
| 1619634839 | Wong, Megan · member of 3 groups | Physician Assistant | Los Banos | CA | premium | premium | premium | |
| 1376715375 | Zahn, Lisa · member of 5 groups | M.D. | Emergency Medicine | Horsham | PA | premium | premium | premium |
| 1285223297 | Ziegler, Summer · member of 3 groups | Physician Assistant | Los Angeles | CA | premium | premium | 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.