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STOLAR, MARKM.D. NPI 1396784591 Clinician

Internal Medicine · WOODSTOCK, IL

Specialty Internal Medicine — from billed Medicare claims
Trained UNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB) — medical school, self-reported to CMS
In practice about 47 years since medical school (class of 1979, self-reported to CMS)
Location WOODSTOCK, IL · NPPES registered location
Active in data Billed Medicare 2020–2024 (5 consecutive years)
Scale 17 codes billed · 1,427 disclosed services (CY2024 — most recent year in data)
Current groups

Group affiliation since 2019

20192026
CENTRAL DUPAGE PHYSICIAN GROUP
2021–2026
NORTHWESTERN MEDICAL FACULTY FOUNDATION
2019–2020

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 2024-03

Year: 2024 · 2023 · 2022  · 2021  · 2020 

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
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
99213 Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
83036 Hemoglobin a1c level
G0008 Administration of influenza virus vaccine
90662 Influenza vaccine split virus, preservative free
96372 Injection of drug or substance under skin or into muscle
93005 Routine electrocardiogram (ecg) using at least 12 leads with tracing
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment
90677 Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use
G0009 Administration of pneumococcal vaccine
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and
G0404 Electrocardiogram, routine ecg with 12 leads; tracing only, without interpretation and report, performed as a screening for the initial preventive physical examination
G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
99442 Telephone medical discussion with physician, 11-20 minutes

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.