Dr. John Armstrong, MD
3434 Villa Ln, Suite 360, Napa, CA 94558 • +1-307-555-6409
Medical Education: Accredited U.S. Medical School (Class of 2006)
What This Doctor Actually Performs: CMS Medicare Utilization & Napa Percentiles
NPI #1790875995 • CBSA Regional • Obstetrics & Gynecology
Anchored in Napa, CA 94558, Dr. John Armstrong, MD (NPI 1790875995) logged 1,874 annual procedures (upper-quartile active clinical volume (66.67th Napa percentile), 64.58th CA percentile, -0.18σ) with sub-specialty concentration in 43 Active CMS HCPCS Codes.
Procedural volume for Dr. Armstrong is led by HCPCS 99214 (Gynecologic, Menopause HRT & Endocrine Follow-Up — 731 annual services, $200–$274 GPCI cash estimate), followed by CPT 76830 (Transvaginal Pelvic & Ovarian Diagnostic Ultrasound, 450/yr) and CPT 99213 (Established Women’s Health & Preventive Care Visit, 375/yr).
At 3434 Villa Ln, Suite 360 (94558), Dr. John Armstrong, MD accommodates direct self-pay scheduling (hybrid in-clinic and telehealth video consults) at ~$239.00 per new consult (4.72/5 bedside rating).
Clinical background for Dr. Armstrong (MD, NPI #1790875995) includes accredited doctoral training (2006, 20 yrs in practice) and virtual + in-office availability across CA.
Compared against Napa, CA Obstetrics & Gynecology peers
1,874 annual services across 208 beneficiaries
Standard deviations from CA Obstetrics & Gynecology mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 99214 | Gynecologic, Menopause HRT & Endocrine Follow-Up | 731 | 66.67th | $200 – $274 |
| 76830 | Transvaginal Pelvic & Ovarian Diagnostic Ultrasound | 450 | 70.67th | $258 – $353 |
| 99213 | Established Women’s Health & Preventive Care Visit | 375 | 64.67th | $157 – $215 |
| 58100 | Endometrial Sampling Biopsy w/ Cannula | 169 | 69.67th | $270 – $370 |
| 99204 | Comprehensive New Patient OB/GYN & Hormone Evaluation | 150 | 65.67th | $282 – $386 |
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Dr. John Armstrong, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Armstrong National Provider Identifier | NPI #1790875995 (MD) | CMS NPPES Registry (94558) |
| Dr. Armstrong Napa CMS Volume Rank | 66.67th Pct (1,874 CMS svcs; Z -0.185σ) | CMS Medicare Part B (CA Obstetrics & Gynecology) |
| Fair Cash-Pay New-Patient Benchmark | $239.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Napa, CA) |
| Waiting-Room Wait Time & Cash Friendliness | $239.00 avg paid • 12 min lobby wait | 26 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.72/5 Listening • 4.65/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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