Dr. Maruja Diaz Arjonilla, MD
2212 E 4th St Ste 304, Santa Ana, CA 92705 • +1-978-555-3480
Medical Education: Accredited U.S. Medical School (Class of 2017)
What This Doctor Actually Performs: CMS Medicare Utilization & Santa Ana Percentiles
NPI #1841481074 • CBSA Regional • Endocrinology
Dr. Maruja Diaz Arjonilla, MD (NPI #1841481074) practices Endocrinology in Santa Ana, CA (92705) with sub-specialty concentration in 35 Active CMS HCPCS Codes, recording 1,010 annual CMS services across 141 distinct beneficiaries—placing this practice as a top-decile high-throughput specialist (99th percentile in Santa Ana) (-0.57σ vs CA state mean, 16.22th statewide percentile).
Fee-schedule auditing of NPI 1841481074 highlights 444 annual claims for 99214 (99th Santa Ana percentile; $104–$143 self-pay corridor) plus 222 encounters under 95251 and 162 under 76536.
Cash-pay intake data for NPI 1841481074 (2212 E 4th St Ste 304, Santa Ana) indicates $239.00 typical out-of-pocket visit spend against a $239.00 locality benchmark, paired with 11-minute average reception wait and 4.53/5 biomarker openness.
Patients evaluating Dr. Maruja Diaz Arjonilla in ZIP 92705 note 9 years of post-doctoral tenure (null, 2017) alongside 7.2 annual CMS procedures per patient.
Top 10% Endocrinology volume leader in Santa Ana, CA
1,010 annual services across 141 beneficiaries
Standard deviations from CA Endocrinology mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 99214 | Complex Endocrine, Thyroid & Metabolic Biomarker Management | 444 | 99th | $104 – $143 |
| 95251 | Ambulatory Continuous Glucose Monitoring (CGM) Data Analysis | 222 | 95th | $65 – $89 |
| 76536 | High-Resolution Thyroid & Parathyroid Neck Ultrasound | 162 | 99.5th | $126 – $173 |
| 99204 | Comprehensive New Patient Endocrine & Hormone Workup | 121 | 97th | $144 – $197 |
| 99215 | High-Complexity Multi-Hormone & Insulin Pump Titration | 61 | 98th | $161 – $221 |
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Dr. Maruja Diaz Arjonilla, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Diaz Arjonilla National Provider Identifier | NPI #1841481074 (MD) | CMS NPPES Registry (92705) |
| Dr. Diaz Arjonilla Santa Ana CMS Volume Rank | 99.00th Pct (1,010 CMS svcs; Z -0.573σ) | CMS Medicare Part B (CA Endocrinology) |
| Fair Cash-Pay New-Patient Benchmark | $239.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Santa Ana, CA) |
| Waiting-Room Wait Time & Cash Friendliness | $239.00 avg paid • 11 min lobby wait | 19 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.78/5 Listening • 4.53/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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