Dr. Karthi Subbannan, MD
6300 Hospital Pkwy Ste 300, Johns Creek, GA 30097 • +1-605-555-4455
Medical Education: Accredited U.S. Medical School (Class of 2017)
What This Doctor Actually Performs: CMS Medicare Utilization & Johns Creek Percentiles
NPI #1154443091 • CBSA Regional • Hematology-Oncology
Operating out of Johns Creek, GA (6300 Hospital Pkwy Ste 300), Hematology-Oncology clinician Dr. Karthi Subbannan, MD (accredited MD/DO training, 2017) maintains a top-decile high-throughput specialist (99th percentile in Johns Creek) (1.27th GA percentile; Z-score -0.63σ across 664 documented services) with sub-specialty concentration in 14 Active CMS HCPCS Codes.
Procedural volume for Dr. Subbannan is led by HCPCS 99214 (Moderate-to-High Complexity Internal Medicine Follow-Up — 299 annual services, $119–$163 GPCI cash estimate), followed by CPT 99213 (Established Preventive & Chronic Care Visit, 173/yr) and CPT 93000 (In-Office 12-Lead Resting Electrocardiogram, 86/yr).
Direct cash-pay transparency modeling sets Dr. Subbannan's baseline new-consult rate near $209.00 in Johns Creek, GA (cash-pay accepted, hybrid in-clinic and telehealth video consults, 21-minute average reception wait).
Credentialed as an MD specialist with 9 years post-graduation experience since completing medical school at an LCME/COCA institution (2017), Dr. Subbannan coordinates 14 Active CMS HCPCS Codes workups from 6300 Hospital Pkwy Ste 300 (+1-605-555-4455).
Top 10% Hematology-Oncology volume leader in Johns Creek, GA
664 annual services across 289 beneficiaries
Standard deviations from GA Hematology-Oncology 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 | 299 | 99th | $119 – $163 |
| 99213 | Established Preventive & Chronic Care Visit | 173 | 96th | $91 – $125 |
| 93000 | In-Office 12-Lead Resting Electrocardiogram | 86 | 97th | $43 – $59 |
| G0439 | Annual Preventive Wellness & Cardiometabolic Risk Assessment | 66 | 99.5th | $139 – $191 |
| 99204 | Comprehensive New Patient Internal Medicine Diagnostic Visit | 40 | 96th | $165 – $226 |
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Dr. Karthi Subbannan, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Subbannan National Provider Identifier | NPI #1154443091 (MD) | CMS NPPES Registry (30097) |
| Dr. Subbannan Johns Creek CMS Volume Rank | 99.00th Pct (664 CMS svcs; Z -0.627σ) | CMS Medicare Part B (GA Hematology-Oncology) |
| Fair Cash-Pay New-Patient Benchmark | $209.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Johns Creek, GA) |
| Waiting-Room Wait Time & Cash Friendliness | $209.00 avg paid • 21 min lobby wait | 7 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.70/5 Listening • 4.90/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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