Dr. Mariastella Serrano, MD
4200 Wisconsin Ave Nw Ste 400, Washington, DC 20016 • +1-830-555-1387
Medical Education: Accredited U.S. Medical School (Class of 2014)
What This Doctor Actually Performs: CMS Medicare Utilization & Washington Percentiles
NPI #1922080126 • CBSA Regional • Pediatric Medicine
Anchored in Washington, DC 20016, Dr. Mariastella Serrano, MD (NPI 1922080126) logged 21,944 annual procedures (focused low-volume boutique caseload (33.33th Washington percentile), 33.33th DC percentile, +0.40σ) with sub-specialty concentration in 11 Active CMS HCPCS Codes.
Granular CPT/HCPCS billing distribution at 4200 Wisconsin Ave Nw Ste 400 shows Dr. Mariastella Serrano's primary concentration in Moderate-to-High Complexity Internal Medicine Follow-Up (code 99214: 28x/yr, 33.33th local percentile) alongside Established Preventive & Chronic Care Visit (99213: 16x/yr, $33–$48).
Uninsured and high-deductible cash patients visiting Dr. Mariastella Serrano in Washington (20016) face an estimated $209.00 initial evaluation fee at 4200 Wisconsin Ave Nw Ste 400 (hybrid in-clinic and telehealth video consults; 17-minute average reception wait; bedside manner 4.84/5 from 19 verified reports).
Spanning 12 years of clinical practice following 2014 graduation from medical training, Dr. Mariastella Serrano integrates 11 Active CMS HCPCS Codes diagnostics for Washington metro patients.
Compared against Washington, DC Pediatric Medicine peers
21,944 annual services across 30 beneficiaries
Standard deviations from DC Pediatric 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 | 28 | 33.33th | $43 – $60 |
| 99213 | Established Preventive & Chronic Care Visit | 16 | 37.33th | $33 – $48 |
| 93000 | In-Office 12-Lead Resting Electrocardiogram | 11 | 32.33th | $25 – $40 |
| G0439 | Annual Preventive Wellness & Cardiometabolic Risk Assessment | 11 | 30.33th | $51 – $70 |
| 99204 | Comprehensive New Patient Internal Medicine Diagnostic Visit | 11 | 28.33th | $60 – $83 |
| 96372 | Therapeutic Subcutaneous/Intramuscular Injection Administration (11 HCPCS billing breadth) | 21,881 | 33.33th | $45 – $65 |
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Dr. Mariastella Serrano, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Serrano National Provider Identifier | NPI #1922080126 (MD) | CMS NPPES Registry (20016) |
| Dr. Serrano Washington CMS Volume Rank | 33.33th Pct (21,944 CMS svcs; Z +0.395σ) | CMS Medicare Part B (DC Pediatric Medicine) |
| Fair Cash-Pay New-Patient Benchmark | $209.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Washington, DC) |
| Waiting-Room Wait Time & Cash Friendliness | $209.00 avg paid • 17 min lobby wait | 19 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.84/5 Listening • 4.72/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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