Dr. Nancy Gryniewicz, MD
965 Lake St, Oak Park, IL 60301 • +1-977-555-8841
Medical Education: Accredited U.S. Medical School (Class of 1999)
What This Doctor Actually Performs: CMS Medicare Utilization & Oak Park Percentiles
NPI #1558368043 • CBSA Regional • Family Practice
Dr. Nancy Gryniewicz, MD (NPI #1558368043) practices Family Practice in Oak Park, IL (60301) with sub-specialty concentration in 49 Active CMS HCPCS Codes, recording 4,117 annual CMS services across 166 distinct beneficiaries—placing this practice as a top-decile high-throughput specialist (92.31th percentile in Oak Park) (+0.05σ vs IL state mean, 89.68th statewide percentile).
Medicare Part B line-item claims for Dr. Nancy Gryniewicz (60301) place 99214 at the top of the practice ledger (1687 yearly units, 92.31th metro rank), rounded out by 99213 and G0439.
Direct cash-pay transparency modeling sets Dr. Gryniewicz's baseline new-consult rate near $218.00 in Oak Park, IL (cash-pay accepted, hybrid in-clinic and telehealth video consults, 13-minute average reception wait).
NPI registry verification (#1558368043) confirms Dr. Nancy Gryniewicz's MD standing serving CBSA 60301 with a 4.64/5 patient scorecard.
Top 10% Family Practice volume leader in Oak Park, IL
4,117 annual services across 166 beneficiaries
Standard deviations from IL Family Practice mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 99214 | Comprehensive Primary Care & Chronic Protocol Management | 1,687 | 92.31th | $88 – $120 |
| 99213 | Focused Acute & Preventive Primary Care Evaluation | 1,245 | 97.31th | $67 – $92 |
| G0439 | Annual Wellness Biomarker & Preventive Screening Visit | 482 | 90.31th | $100 – $138 |
| 36415 | Routine Venipuncture Blood Biomarker Collection | 361 | 91.31th | $25 – $40 |
| 99204 | New Patient Primary Care Intake & Diagnostic Plan | 241 | 87.31th | $120 – $165 |
| 96372 | Therapeutic Subcutaneous/Intramuscular Injection Administration (49 HCPCS billing breadth) | 101 | 92.31th | $79 – $115 |
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Dr. Nancy Gryniewicz, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Gryniewicz National Provider Identifier | NPI #1558368043 (MD) | CMS NPPES Registry (60301) |
| Dr. Gryniewicz Oak Park CMS Volume Rank | 92.31th Pct (4,117 CMS svcs; Z +0.048σ) | CMS Medicare Part B (IL Family Practice) |
| Fair Cash-Pay New-Patient Benchmark | $218.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Oak Park, IL) |
| Waiting-Room Wait Time & Cash Friendliness | $218.00 avg paid • 13 min lobby wait | 19 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.87/5 Listening • 4.80/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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