Dr. William P. Warren, MD
Cardiology (Cardiovascular Disease Physician)
- Medicare participating
At a glance
- Medical school
- Harvard Medical School (1996)
- Years since graduation
- 30
- In the NPI registry since
- 2005
- Medicare patients seen, 2024
- 2,954
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1996Medical school: Harvard Medical School
- 2005Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Cardiovascular Disease Physician primary
TN license 37188 -
Nuclear Cardiology Physician
TN license 37188
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Memorial Healthcare System, Inc Chattanooga, TN
- Erlanger Medical Center Chattanooga, TN
- Commonspirit-Memorial Hospital-North Georgia Ringgold, GA
- Rhea Medical Center Dayton, TN
Medical groups
- Memorial Health Care System Inc. (56 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 2,954
- Services billed
- 6,094
- Patients’ average age
- 77
| Service | Times | Patients |
|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 2,748 | 2,113 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 1,092 | 1,044 |
| Established patient office or other outpatient visit, 30-39 minutes | 775 | 630 |
| Blood test, clotting time | 623 | 59 |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | 315 | 314 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 188 | 94 |
| New patient office or other outpatient visit, 45-59 minutes | 163 | 163 |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician | 148 | 148 |
| Ultrasound of both sides of head and neck blood flow | 59 | 59 |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician | 53 | 53 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Eliquis (apixaban) Other prescribers in Chattanooga, TN | 1,258 |
| Amlodipine Besylate Other prescribers in Chattanooga, TN | 983 |
| Atorvastatin Calcium Other prescribers in Chattanooga, TN | 871 |
| Carvedilol Other prescribers in Chattanooga, TN | 832 |
| Metoprolol Succinate Other prescribers in Chattanooga, TN | 792 |
| Metoprolol Tartrate Other prescribers in Chattanooga, TN | 701 |
| Rosuvastatin Calcium Other prescribers in Chattanooga, TN | 685 |
| Clopidogrel (clopidogrel bisulfate) Other prescribers in Chattanooga, TN | 454 |
| Losartan Potassium Other prescribers in Chattanooga, TN | 441 |
| Jantoven (warfarin sodium) Other prescribers in Chattanooga, TN | 412 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 1 companies reported 1 payments worth $13.54 in total to this clinician.
| Boston Scientific Corporation | $13.54 |
|---|
| Food and Beverage | $13.54 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.