Dr. Gregorio Guillen, MD
400 State St. Suite 2, Perth Amboy, NJ 08861 • +1-923-555-9010
Medical Education: Accredited U.S. Medical School (Class of 1992)
What This Doctor Actually Performs: CMS Medicare Utilization & Perth Amboy Percentiles
NPI #1538252226 • CBSA Regional • Internal Medicine
Within the Perth Amboy, NJ (CBSA local) Internal Medicine cohort, Dr. Gregorio Guillen, MD with sub-specialty concentration in 35 Active CMS HCPCS Codes ranks at the 50th municipal percentile and 41.37th NJ percentile (-0.23σ Z-score) based on 1,281 billed procedures for 202 patients.
Procedural volume for Dr. Guillen is led by HCPCS 99214 (Moderate-to-High Complexity Internal Medicine Follow-Up — 545 annual services, $156–$213 GPCI cash estimate), followed by CPT 99213 (Established Preventive & Chronic Care Visit, 315/yr) and CPT 93000 (In-Office 12-Lead Resting Electrocardiogram, 157/yr).
Direct cash-pay transparency modeling sets Dr. Guillen's baseline new-consult rate near $209.00 in Perth Amboy, NJ (cash-pay accepted, in-person clinic visits only, 20-minute average reception wait).
NPI registry verification (#1538252226) confirms Dr. Gregorio Guillen's MD standing serving CBSA 08861 with a 4.65/5 patient scorecard.
Compared against Perth Amboy, NJ Internal Medicine peers
1,281 annual services across 202 beneficiaries
Standard deviations from NJ Internal Medicine mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 99214 | Moderate-to-High Complexity Internal Medicine Follow-Up | 545 | 50th | $156 – $213 |
| 99213 | Established Preventive & Chronic Care Visit | 315 | 46th | $119 – $163 |
| 93000 | In-Office 12-Lead Resting Electrocardiogram | 157 | 50th | $57 – $78 |
| G0439 | Annual Preventive Wellness & Cardiometabolic Risk Assessment | 121 | 51th | $183 – $250 |
| 99204 | Comprehensive New Patient Internal Medicine Diagnostic Visit | 73 | 54th | $217 – $297 |
| 96372 | Therapeutic Subcutaneous/Intramuscular Injection Administration (35 HCPCS billing breadth) | 70 | 50th | $140 – $203 |
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Dr. Gregorio Guillen, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Guillen National Provider Identifier | NPI #1538252226 (MD) | CMS NPPES Registry (08861) |
| Dr. Guillen Perth Amboy CMS Volume Rank | 50.00th Pct (1,281 CMS svcs; Z -0.232σ) | CMS Medicare Part B (NJ Internal Medicine) |
| Fair Cash-Pay New-Patient Benchmark | $209.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Perth Amboy, NJ) |
| Waiting-Room Wait Time & Cash Friendliness | $209.00 avg paid • 20 min lobby wait | 12 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.86/5 Listening • 4.49/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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