Dr. William S. Grigg, D.O.
Cardiac Electrophysiology (Clinical Cardiac Electrophysiology Physician)
- Medicare participating
At a glance
- Medical school
- Philadelphia College of Osteopathic Medicine (2018)
- Years since graduation
- 8
- In the NPI registry since
- 2018
- Medicare patients seen, 2024
- 94
Licensed in Colorado since 2019, according to the Colorado Department of Regulatory Agencies. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
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. What an NPI is
Education and training
- 2018Medical school: Philadelphia College of Osteopathic Medicine
- 2018Registered with an NPI (national billing number; not a license date)
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
-
Clinical Cardiac Electrophysiology Physician primary
AR license E18962 -
Hospitalist Physician
CO license DR.0062850 (first issued 2019; active) -
Internal Medicine Physician
CO license DR.0062850 (first issued 2019; active) · CO license TL.0007279 -
Student in an Organized Health Care Education/Training Program
CO license TL.0007279
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Baxter Health Mountain Home, AR
Medical groups
- Virtumedex of Florida PA (4 clinicians)
- Harbor Medical of New York PC (4 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
- 94
- Services billed
- 114
- Patients’ average age
- 76
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 30-39 minutes | 56 | 49 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 39 | 36 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 34 | 34 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 22 | 15 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 17 | 17 |
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 Mountain Home, AR | 29 |
| Clonazepam Other prescribers in Mountain Home, AR | 28 |
| Metoprolol Succinate Other prescribers in Mountain Home, AR | 26 |
| Clopidogrel (clopidogrel bisulfate) Other prescribers in Mountain Home, AR | 25 |
| Rosuvastatin Calcium Other prescribers in Mountain Home, AR | 24 |
| Alprazolam Other prescribers in Mountain Home, AR | 20 |
| Carvedilol Other prescribers in Mountain Home, AR | 19 |
| Zolpidem Tartrate Other prescribers in Mountain Home, AR | 14 |
| Dextroamphetamine-Amphetamine (dextroamphetamine/amphetamine) Other prescribers in Mountain Home, AR | 13 |
| Atorvastatin Calcium Other prescribers in Mountain Home, AR | 11 |
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, 4 companies reported 60 payments worth $44,566 in total to this clinician.
| Medtronic, Inc. | $21,137 |
|---|---|
| Boston Scientific Corporation | $18,756 |
| Abbott Laboratories | $2,909 |
| Biosense Webster, Inc. | $1,764 |
| Grant | $35,000 |
|---|---|
| Travel and Lodging | $7,149 |
| Food and Beverage | $2,220 |
| Education | $198 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Medtronic, Inc. Jul 8, 2025 | Grant | $20,000 |
| Boston Scientific Corporation Sep 18, 2025 | Grant EMBLEM MRI S-ICD · EMBLEM_CRM | $15,000 |
| Boston Scientific Corporation Mar 15, 2025 | Travel and Lodging FARAPULSE · FARAPULSE_EP · travel to Austin, TX · in-kind | $857 |
| Medtronic, Inc. Nov 4, 2025 | Travel and Lodging travel to Tampa, FL · in-kind | $833 |
| Biosense Webster, Inc. May 9, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Palm Beach Gardens, FL · in-kind | $674 |
| Boston Scientific Corporation Nov 21, 2025 | Travel and Lodging WATCHMAN Access System · WATCHMAN_IC · travel to Fort Lauderdale, FL · in-kind | $515 |
| Biosense Webster, Inc. May 28, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Palm Beach Gardens, FL · in-kind | $406 |
| Boston Scientific Corporation Nov 14, 2025 | Travel and Lodging INGEVITY MRI · INGEVITY_CRM · travel to Charlotte, NC · in-kind | $399 |
| Abbott Laboratories Aug 18, 2025 | Travel and Lodging ENSITE PRECISION · Structural Heart · travel to Chicago, IL · in-kind | $398 |
| Abbott Laboratories Aug 21, 2025 | Travel and Lodging ENSITE · Structural Heart · travel to Chicago, IL · in-kind | $349 |
All 28 payments other than meals, newest first
| Company | What it was for | Amount |
|---|---|---|
| Boston Scientific Corporation Nov 21, 2025 | Travel and Lodging WATCHMAN Access System · WATCHMAN_IC · travel to Fort Lauderdale, FL · in-kind | $515 |
| Boston Scientific Corporation Nov 21, 2025 | Travel and Lodging WATCHMAN Access System · WATCHMAN_IC · travel to Fort Lauderdale, FL · in-kind | $173 |
| Boston Scientific Corporation Nov 21, 2025 | Travel and Lodging WATCHMAN Access System · WATCHMAN_IC · travel to Fort Lauderdale, FL · in-kind | $19.62 |
| Boston Scientific Corporation Nov 16, 2025 | Travel and Lodging INGEVITY MRI · INGEVITY_CRM · travel to Charlotte, NC · in-kind | $43.72 |
| Boston Scientific Corporation Nov 15, 2025 | Travel and Lodging INGEVITY MRI · INGEVITY_CRM · travel to Charlotte, NC · in-kind | $310 |
| Boston Scientific Corporation Nov 15, 2025 | Travel and Lodging INGEVITY MRI · INGEVITY_CRM · travel to Charlotte, NC · in-kind | $49.56 |
| Boston Scientific Corporation Nov 14, 2025 | Travel and Lodging INGEVITY MRI · INGEVITY_CRM · travel to Charlotte, NC · in-kind | $399 |
| Boston Scientific Corporation Nov 14, 2025 | Travel and Lodging INGEVITY MRI · INGEVITY_CRM · travel to Charlotte, NC · in-kind | $310 |
| Medtronic, Inc. Nov 4, 2025 | Travel and Lodging travel to Tampa, FL · in-kind | $833 |
| Abbott Laboratories Sep 30, 2025 | Education ENSITE · Structural Heart · in-kind | $198 |
| Boston Scientific Corporation Sep 18, 2025 | Grant EMBLEM MRI S-ICD · EMBLEM_CRM | $15,000 |
| Abbott Laboratories Aug 23, 2025 | Travel and Lodging ENSITE · Structural Heart · travel to Chicago, IL · in-kind | $349 |
| Abbott Laboratories Aug 22, 2025 | Travel and Lodging ENSITE · Structural Heart · travel to Chicago, IL · in-kind | $349 |
| Abbott Laboratories Aug 21, 2025 | Travel and Lodging ENSITE · Structural Heart · travel to Chicago, IL · in-kind | $349 |
| Abbott Laboratories Aug 21, 2025 | Travel and Lodging ENSITE · Structural Heart · travel to Chicago, IL · in-kind | $171 |
| Abbott Laboratories Aug 21, 2025 | Travel and Lodging ENSITE · Structural Heart · travel to Chicago, IL · in-kind | $60.00 |
| Abbott Laboratories Aug 18, 2025 | Travel and Lodging ENSITE PRECISION · Structural Heart · travel to Chicago, IL · in-kind | $398 |
| Abbott Laboratories Aug 18, 2025 | Travel and Lodging ENSITE PRECISION · Structural Heart · travel to Chicago, IL · in-kind | $9.02 |
| Medtronic, Inc. Jul 8, 2025 | Grant | $20,000 |
| Biosense Webster, Inc. May 28, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Palm Beach Gardens, FL · in-kind | $406 |
| Biosense Webster, Inc. May 19, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Palm Beach Gardens, FL · in-kind | $155 |
| Biosense Webster, Inc. May 18, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Palm Beach Gardens, FL · in-kind | $28.18 |
| Biosense Webster, Inc. May 9, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Palm Beach Gardens, FL · in-kind | $674 |
| Boston Scientific Corporation Mar 16, 2025 | Travel and Lodging FARAPULSE · FARAPULSE_EP · travel to Austin, TX · in-kind | $96.36 |
| Boston Scientific Corporation Mar 15, 2025 | Travel and Lodging FARAPULSE · FARAPULSE_EP · travel to Austin, TX · in-kind | $857 |
| Boston Scientific Corporation Mar 15, 2025 | Travel and Lodging FARAPULSE · FARAPULSE_EP · travel to Austin, TX · in-kind | $327 |
| Medtronic, Inc. Jan 9, 2025 | Travel and Lodging travel to Washington D.C., DC · in-kind | $234 |
| Medtronic, Inc. Jan 9, 2025 | Travel and Lodging travel to Washington D.C., DC · in-kind | $34.65 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
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.