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OBSERVATION ASSOCIATES OF THE UNIVERSITY OF ROCHESTER

PAC 7517919244 Physician group
PHYSICIAN ASSISTANT · ROCHESTER, NY · hospital-affiliated
Specialty PHYSICIAN ASSISTANT — most common member specialty (multi-specialty groups carry one label; see Methods)
Footprint Registered in ROCHESTER, NY · bills Medicare in 4 states (CA, FL, NY, WY)
Scale 39 providers on the CMS registry roster · 23 codes billed (five-year data window) · 1,205 services (all billed codes, CY2024)
Medicare paid $103K · across all billed codes, CY2024, attributed & disclosed
Affiliation Hospital-affiliated — at least one member holds a hospital affiliation in the CMS registry
Contact (585) 275-0980 — 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 9Advanced-practice 22Other clinicians 0= 31 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 31 are the clinicians who billed in CY2024 — a subset of the all-time registry roster shown on the group's identity card.

Billed 12 of the group's 23 codes this year, across 4 states (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
Data year: CY2024 CY2023 CY2022  CY2021  CY2020 

Provider volumes, all codes · CY2024

NPIProviderCredentialsTypeCitySt Services (all codes)
1891040630 Sivarajah, Tharenie MD Family Practice CheyenneWY
1306101159 Weisenberger, Justin DO Internal Medicine RochesterNY
1801439211 Di Stefano, Jacqueline PA-C Physician Assistant GlendaleCA
1811473796 Weldon, Diana PA-C Physician Assistant RochesterNY
1528032646 King, Stella MD Family Practice RochesterNY
1518587716 Kahler, John MD Internal Medicine RochesterNY
1104222793 Laduke, Ryan PA-C Physician Assistant RochesterNY
1598335994 Baumer, Erica PA-C Physician Assistant RochesterNY
1790841500 Weeden, Robert D.O. Internal Medicine CanandaiguaNY
1003167933 Blythe, Jean PA Physician Assistant OrlandoFL
1013648815 Hunter, Scott PA-C Physician Assistant RochesterNY
1427525633 Mundt, Eric Physician Assistant RochesterNY
1215459755 Sterzin, Kyle PA Physician Assistant RochesterNY
1073708707 Gotie, Amanda Nurse Practitioner RochesterNY
1184738056 Romanofsky, Kelly PA Physician Assistant RochesterNY
1326561952 Engle, Christie PA Physician Assistant RochesterNY
1275918252 Fishel, Sean PA-C Physician Assistant RochesterNY
1306219712 Li, Shifan MD Internal Medicine RochesterNY
1528410750 Vick, Zachary PA Physician Assistant RochesterNY
1063504777 Bryant, Sabrina Nurse Practitioner RochesterNY
1649679606 Hart, Jordan PA-C Physician Assistant RochesterNY
1952635989 Early, Kristine RPA-C Physician Assistant RochesterNY
1225095706 Huffman, Stephanie RPA-C Physician Assistant WebsterNY
1326497090 Bastian, Bradley · member of 2 groups N.P. Nurse Practitioner RochesterNY
1871183657 Carle, Erika · member of 2 groups FNP Nurse Practitioner RochesterNY
1205327806 Enriquez, Fabiola · member of 2 groups MD Emergency Medicine RochesterNY
1649630096 Geer, Brandon · member of 2 groups MSN, RN, FNP-C, CEN Nurse Practitioner New YorkNY
1750706990 Kleeh, Chelsie · member of 3 groups P.A. Physician Assistant RochesterNY
1235626391 Nelson, Christopher · member of 2 groups Internal Medicine RochesterNY
1639802689 Porter, Andrew · member of 2 groups NP Nurse Practitioner RochesterNY
1134153729 Svengsouk, Jefferson · member of 3 groups MD Emergency Medicine RochesterNY

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.