Dr. Michelle Marrinan, MD
49 Lake Ave, Greenwich, CT 06830 • +1-954-555-7379
Medical Education: Accredited U.S. Medical School (Class of 2012)
What This Doctor Actually Performs: CMS Medicare Utilization & Greenwich Percentiles
NPI #1598761629 • CBSA Regional • Otolaryngology
Within the Greenwich, CT (CBSA local) Otolaryngology cohort, Dr. Michelle Marrinan, MD with sub-specialty concentration in 23 Active CMS HCPCS Codes ranks at the 0th municipal percentile and 8.22th CT percentile (-0.86σ Z-score) based on 721 billed procedures for 289 patients.
Among 5 tracked CMS fee-schedule codes for Dr. Marrinan (averaging 2.5 services per beneficiary), 99213 (Focused Ear, Nose, Sinus & Throat Examination) represents 34% of tracked volume (245 encounters), paired with 31231 (180x).
Self-pay new patient consultations with Dr. Marrinan (CPT 99204 GPCI-adjusted benchmark) estimate around $209.00 (community reported average: $209.00) with hybrid in-clinic and telehealth video consults, 18-minute average reception wait, and a 4.60/5 modern protocol openness score across 14 patient logs.
Clinical background for Dr. Marrinan (MD, NPI #1598761629) includes accredited doctoral training (2012, 14 yrs in practice) and virtual + in-office availability across CT.
Compared against Greenwich, CT Otolaryngology peers
721 annual services across 289 beneficiaries
Standard deviations from CT Otolaryngology mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 99213 | Focused Ear, Nose, Sinus & Throat Examination | 245 | 12th | $122 – $168 |
| 31231 | Diagnostic Rigid/Flexible Nasal & Sinus Endoscopy | 180 | 12th | $246 – $337 |
| 31575 | Flexible Fiberoptic Laryngoscopy Vocal Cord Inspection | 137 | 12th | $180 – $246 |
| 92557 | Comprehensive Pure-Tone Audiometry & Speech Recognition | 94 | 12th | $86 – $119 |
| 69210 | Instrumented Impacted Cerumen Removal Under Microscopy | 65 | 12th | $77 – $106 |
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Dr. Michelle Marrinan, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Marrinan National Provider Identifier | NPI #1598761629 (MD) | CMS NPPES Registry (06830) |
| Dr. Marrinan Greenwich CMS Volume Rank | 0.00th Pct (721 CMS svcs; Z -0.860σ) | CMS Medicare Part B (CT Otolaryngology) |
| Fair Cash-Pay New-Patient Benchmark | $209.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Greenwich, CT) |
| Waiting-Room Wait Time & Cash Friendliness | $209.00 avg paid • 18 min lobby wait | 14 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.89/5 Listening • 4.60/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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