Dr. John Prenshaw, MD
7320 Shallowford Rd, Chattanooga, TN 37421 • +1-661-555-4121
Medical Education: Accredited U.S. Medical School (Class of 2012)
What This Doctor Actually Performs: CMS Medicare Utilization & Chattanooga Percentiles
NPI #1164869475 • CBSA Regional • Ophthalmology
Within the Chattanooga, TN (CBSA local) Ophthalmology cohort, Dr. John Prenshaw, MD with sub-specialty concentration in 32 Active CMS HCPCS Codes ranks at the 22.22th municipal percentile and 22.55th TN percentile (-0.27σ Z-score) based on 1,641 billed procedures for 487 patients.
Granular CPT/HCPCS billing distribution at 7320 Shallowford Rd shows Dr. John Prenshaw's primary concentration in Comprehensive Ophthalmologic Slit-Lamp & Dilated Retinal Exam (code 92014: 607x/yr, 22.22th local percentile) alongside Scanning Computerized Ophthalmic Retinal OCT Imaging (92134: 427x/yr, $172–$236).
For out-of-network patients contacting +1-661-555-4121, Dr. Prenshaw's practice posts a $201.00 GPCI self-pay consult estimate ($201.00 patient-logged median, 4.81/5 composite reality score over 20 submissions).
NPI registry verification (#1164869475) confirms Dr. John Prenshaw's MD standing serving CBSA 37421 with a 4.81/5 patient scorecard.
Compared against Chattanooga, TN Ophthalmology peers
1,641 annual services across 487 beneficiaries
Standard deviations from TN Ophthalmology mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 92014 | Comprehensive Ophthalmologic Slit-Lamp & Dilated Retinal Exam | 607 | 22.22th | $313 – $428 |
| 92134 | Scanning Computerized Ophthalmic Retinal OCT Imaging | 427 | 22.22th | $172 – $236 |
| 92083 | Extended Threshold Visual Field Glaucoma Perimetry | 279 | 27.22th | $207 – $283 |
| 92004 | New Patient Complete Medical Eye & IOP Evaluation | 197 | 27.22th | $376 – $515 |
| 66984 | Extracapsular Cataract Removal w/ Intraocular Lens Implant | 131 | 25.22th | $1377 – $1887 |
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Dr. John Prenshaw, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Prenshaw National Provider Identifier | NPI #1164869475 (MD) | CMS NPPES Registry (37421) |
| Dr. Prenshaw Chattanooga CMS Volume Rank | 22.22th Pct (1,641 CMS svcs; Z -0.270σ) | CMS Medicare Part B (TN Ophthalmology) |
| Fair Cash-Pay New-Patient Benchmark | $201.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Chattanooga, TN) |
| Waiting-Room Wait Time & Cash Friendliness | $201.00 avg paid • 18 min lobby wait | 20 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.63/5 Listening • 4.75/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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