Dr. Mark Grijnsztein, MD
8170 Laguna Blvd, Suite 200, Elk Grove, CA 95758 • +1-481-555-3768
Medical Education: Accredited U.S. Medical School (Class of 2008)
What This Doctor Actually Performs: CMS Medicare Utilization & Elk Grove Percentiles
NPI #1164580866 • CBSA Regional • Allergy/ Immunology
Anchored in Elk Grove, CA 95758, Dr. Mark Grijnsztein, MD (NPI 1164580866) logged 4,534 annual procedures (top-decile high-throughput specialist (99th percentile in Elk Grove), 41th CA percentile, -0.40σ) with sub-specialty concentration in 20 Active CMS HCPCS Codes.
Among 5 tracked CMS fee-schedule codes for Dr. Grijnsztein (averaging 31.7 services per beneficiary), 99214 (Moderate-to-High Complexity Internal Medicine Follow-Up) represents 45% of tracked volume (2040 encounters), paired with 99213 (1179x).
Direct cash-pay transparency modeling sets Dr. Grijnsztein's baseline new-consult rate near $239.00 in Elk Grove, CA (cash-pay accepted, hybrid in-clinic and telehealth video consults, 16-minute average reception wait).
Spanning 18 years of clinical practice following 2008 graduation from medical training, Dr. Mark Grijnsztein integrates 20 Active CMS HCPCS Codes diagnostics for Elk Grove metro patients.
Top 10% Allergy/ Immunology volume leader in Elk Grove, CA
4,534 annual services across 143 beneficiaries
Standard deviations from CA Allergy/ Immunology 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 | 2,040 | 99th | $50 – $68 |
| 99213 | Established Preventive & Chronic Care Visit | 1,179 | 98th | $38 – $53 |
| 93000 | In-Office 12-Lead Resting Electrocardiogram | 589 | 99.5th | $25 – $40 |
| G0439 | Annual Preventive Wellness & Cardiometabolic Risk Assessment | 453 | 99.5th | $58 – $80 |
| 99204 | Comprehensive New Patient Internal Medicine Diagnostic Visit | 272 | 99.5th | $69 – $94 |
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Dr. Mark Grijnsztein, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Grijnsztein National Provider Identifier | NPI #1164580866 (MD) | CMS NPPES Registry (95758) |
| Dr. Grijnsztein Elk Grove CMS Volume Rank | 99.00th Pct (4,534 CMS svcs; Z -0.398σ) | CMS Medicare Part B (CA Allergy/ Immunology) |
| Fair Cash-Pay New-Patient Benchmark | $239.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Elk Grove, CA) |
| Waiting-Room Wait Time & Cash Friendliness | $239.00 avg paid • 16 min lobby wait | 22 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.66/5 Listening • 4.85/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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