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KIRWIN, STEPHANIE NPI 1043972292 Clinician

Physician Assistant · SAN DIEGO, CA

Specialty Physician Assistant — from billed Medicare claims
Trained YALE UNIVERSITY SCHOOL OF MEDICINE — medical school, self-reported to CMS
In practice about 5 years since medical school (class of 2021, self-reported to CMS)
Location SAN DIEGO, CA · NPPES registered location
Active in data Billed Medicare 2023–2024 (2 consecutive years)
Scale 12 codes billed · 10,904 disclosed services (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

Group affiliation since 2019

20232026
MONICA PERLMAN MD INC
2026
WILLIAM C EVES M D INC
2023–2026

The roster archive begins in 2019, so a span starting at 2019 may reach back further. 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 2026-01

Year: 2024 · 2023

Provider overview · all codes · CY2024

The full analytics for this provider

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The billed-volume positioning, practice focus, and economics behind this provider — computed on the same disclosed Medicare Part B data.

This provider's disclosed Medicare payments across all codes were in CY2024. Unlock to see the figure.

  • Payment, 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
  • Volume over five years — discrete yearly counts, no rate
  • 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 Services Beneficiary-episodes Avg charge Avg Medicare payment
J1010 Injection, methylprednisolone acetate, 1 mg
J7320 Hyaluronan or derivitive, genvisc 850, for intra-articular injection, 1 mg
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
76881 Complete ultrasound scan of joint
76882 Limited ultrasound scan of joint or other extremity structure except blood vessels
J7321 Hyaluronan or derivative, hyalgan, supartz or visco-3, for intra-articular injection, per dose
76942 Ultrasonic guidance for needle placement
J1885 Injection, ketorolac tromethamine, per 15 mg
20550 Injection into tendon or ligament
J1030 Injection, methylprednisolone acetate, 40 mg
J1040 Injection, methylprednisolone acetate, 80 mg

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.