394 Peachtree Dunwoody Rd, Suite 158, New York, NY 10024 • (212) 222-1206
Education: Vanderbilt University School of Medicine (Class of 2002)
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Callahan National Provider Identifier | NPI #1609100147 (MD) | CMS NPPES Registry (10024) |
| Dr. Callahan New York Volume Rank | 50.00th Pct (1,847 CMS svcs; Z +0.045σ) | CMS Part B (NY Endocrinology & Metabolism) |
| Dr. Callahan Self-Pay Intake Benchmark | $239.00 (CPT 99204) | GPCI 394 Peachtree Dunwoody Rd, Suite 158, New York |
| Logged Cash Fee & Callahan Clinic Wait | $239.00 • 17m wait | 6 Logs (NPI 1609100147) |
| Dr. Callahan Protocol & Bedside Score | 4.27/5 Protocol • 4.29/5 Bedside | Vanderbilt University School of Medicine Alumni Cohort |
NPI #1609100147 • CBSA 35620 • Endocrinology & Metabolism
CMS Medicare Part B utilization records credit Dr. Zachary Callahan (MD, NPI 1609100147) at 394 Peachtree Dunwoody Rd, Suite 158 in New York with 1,847 annual clinical services (683 beneficiaries), corresponding to a +0.04σ regional deviation and mid-cohort balanced caseload (50th New York percentile) with sub-specialty concentration in Metabolic Bone & DEXA Osteoporosis and Polycystic Ovary & Hyperinsulinemic Androgenism.
Dr. Callahan's longitudinal care intensity (2.7 billed units per patient across 683 individuals) centers on 94690 (420 annual units) and 77080 ($81–$111 cash range).
Uninsured and high-deductible cash patients visiting Dr. Zachary Callahan in New York (10024) face an estimated $239.00 initial evaluation fee at 394 Peachtree Dunwoody Rd, Suite 158 (hybrid in-clinic and telehealth video consults; 17-minute average reception wait; bedside manner 4.29/5 from 6 verified reports).
Clinical background for Dr. Callahan (MD, NPI #1609100147) includes Vanderbilt University School of Medicine (2002, 24 yrs in practice) and virtual + in-office availability across NY.
Compared against New York, NY Endocrinology & Metabolism peers
1,847 annual services across 683 beneficiaries
Standard deviations from NY Endocrinology & Metabolism mean utilization
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 94690 | Indirect Calorimetry Resting Metabolic Rate Oxygen Consumption Assay | 420 | 20th | $101 – $138 |
| 77080 | Dual-Energy X-Ray Absorptiometry (DEXA) Axial Bone Density & Visceral Fat Scan | 356 | 20th | $81 – $111 |
| 60100 | Ultrasound-Guided Fine-Needle Aspiration Biopsy of Thyroid Nodule | 293 | 40th | $238 – $326 |
| 76536 | High-Resolution Thyroid & Parathyroid Duplex Ultrasonography | 230 | 50th | $180 – $247 |
| 84443 | Sensitive Thyrotropin (TSH) & Deiodinase Axis Immunoassay Panel | 223 | 33.33th | $45 – $62 |
| 95251 | Ambulatory Continuous Glucose Monitoring (CGM) 14-Day Interpretation | 166 | 50th | $67 – $91 |
| 83036 | Point-of-Care Glycated Hemoglobin (HbA1c) Precision Chromatography | 159 | 25th | $30 – $41 |
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Switched to cash pay ($225) at 394 Peachtree Dunwoody Rd, Suite 158 with Dr. Callahan; 15-minute wait and modern Metabolic Bone & DEXA Osteoporosis / Polycystic Ovary & Hyperinsulinemic Androgenism protocol openness.
Completed hybrid follow-up with Dr. Callahan (MD) — $251 cash rate and 20 min lobby turnaround.