Dr. Tamara Dahhan, DO
14445 Olive View DR, Department of Medicine (2b-182), Sylmar, CA 91342 • +1-249-555-4816
Medical Education: Accredited U.S. Medical School (Class of 2001)
What This Doctor Actually Performs: CMS Medicare Utilization & Sylmar Percentiles
NPI #1093074627 • CBSA Regional • Rheumatology
Anchored in Sylmar, CA 91342, Dr. Tamara Dahhan, DO (NPI 1093074627) logged 1,984 annual procedures (top-decile high-throughput specialist (99th percentile in Sylmar), 31.12th CA percentile, -0.48σ) with sub-specialty concentration in 32 Active CMS HCPCS Codes.
Granular CPT/HCPCS billing distribution at 14445 Olive View DR, Department of Medicine (2b-182) shows Dr. Tamara Dahhan's primary concentration in Autoimmune Arthritis & Biologic/DMARD Safety Evaluation (code 99214: 414x/yr, 99th local percentile) alongside Large Joint Synovial Arthrocentesis or Corticosteroid Injection (20610: 189x/yr, $95–$130).
At 14445 Olive View DR, Department of Medicine (2b-182) (91342), Dr. Tamara Dahhan, DO accommodates direct self-pay scheduling (in-person clinic visits only) at ~$239.00 per new consult (4.66/5 bedside rating).
Clinical background for Dr. Dahhan (DO, NPI #1093074627) includes accredited doctoral training (2001, 25 yrs in practice) and dedicated on-site consultations at 14445 Olive View DR, Department of Medicine (2b-182).
Top 10% Rheumatology volume leader in Sylmar, CA
1,984 annual services across 253 beneficiaries
Standard deviations from CA Rheumatology mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 99214 | Autoimmune Arthritis & Biologic/DMARD Safety Evaluation | 414 | 99th | $120 – $164 |
| 20610 | Large Joint Synovial Arthrocentesis or Corticosteroid Injection | 189 | 99.5th | $95 – $130 |
| 96413 | Intravenous Biologic Infusion Therapy (First Hour) | 135 | 95th | $164 – $225 |
| 76881 | Complete Joint Synovitis High-Resolution Ultrasound | 90 | 96th | $125 – $171 |
| 99204 | New Patient Autoimmune & Rheumatology Diagnostic Workup | 72 | 96th | $164 – $225 |
| 96372 | Therapeutic Subcutaneous/Intramuscular Injection Administration (32 HCPCS billing breadth) | 1,085 | 99th | $103 – $149 |
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Dr. Tamara Dahhan, DO Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Dahhan National Provider Identifier | NPI #1093074627 (DO) | CMS NPPES Registry (91342) |
| Dr. Dahhan Sylmar CMS Volume Rank | 99.00th Pct (1,984 CMS svcs; Z -0.483σ) | CMS Medicare Part B (CA Rheumatology) |
| Fair Cash-Pay New-Patient Benchmark | $239.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Sylmar, CA) |
| Waiting-Room Wait Time & Cash Friendliness | $239.00 avg paid • 15 min lobby wait | 21 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.66/5 Listening • 4.45/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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