Dr. Mark Johnson, MD
910 N Eisenhower Ave, Mason City, IA 50401 • +1-675-555-8061
Medical Education: Accredited U.S. Medical School (Class of 2016)
What This Doctor Actually Performs: CMS Medicare Utilization & Mason City Percentiles
NPI #1013923127 • CBSA Regional • Endocrinology
Anchored in Mason City, IA 50401, Dr. Mark Johnson, MD (NPI 1013923127) logged 3,877 annual procedures (top-decile high-throughput specialist (99th percentile in Mason City), 50th IA percentile, -0.33σ) with sub-specialty concentration in 12 Active CMS HCPCS Codes.
Dr. Johnson's longitudinal care intensity (2.5 billed units per patient across 1561 individuals) centers on 99214 (1706 annual units) and 95251 ($38–$53 cash range).
Direct cash-pay transparency modeling sets Dr. Johnson's baseline new-consult rate near $209.00 in Mason City, IA (cash-pay accepted, in-person clinic visits only, 10-minute average reception wait).
Patients evaluating Dr. Mark Johnson in ZIP 50401 note 10 years of post-doctoral tenure (null, 2016) alongside 2.5 annual CMS procedures per patient.
Top 10% Endocrinology volume leader in Mason City, IA
3,877 annual services across 1,561 beneficiaries
Standard deviations from IA 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 | 1,706 | 99th | $61 – $83 |
| 95251 | Ambulatory Continuous Glucose Monitoring (CGM) Data Analysis | 853 | 95th | $38 – $53 |
| 76536 | High-Resolution Thyroid & Parathyroid Neck Ultrasound | 620 | 99.5th | $73 – $100 |
| 99204 | Comprehensive New Patient Endocrine & Hormone Workup | 465 | 99.5th | $83 – $114 |
| 99215 | High-Complexity Multi-Hormone & Insulin Pump Titration | 233 | 95th | $93 – $128 |
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Dr. Mark Johnson, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Johnson National Provider Identifier | NPI #1013923127 (MD) | CMS NPPES Registry (50401) |
| Dr. Johnson Mason City CMS Volume Rank | 99.00th Pct (3,877 CMS svcs; Z -0.325σ) | CMS Medicare Part B (IA Endocrinology) |
| Fair Cash-Pay New-Patient Benchmark | $209.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Mason City, IA) |
| Waiting-Room Wait Time & Cash Friendliness | $209.00 avg paid • 10 min lobby wait | 18 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.56/5 Listening • 4.82/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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