Dr. John Hollowell, MD
What this data tells you about Dr. Hollowell
Dr. John Hollowell is a cardiovascular disease in Plano, TX, with 20 years in practice. Based on federal Medicare data, Dr. Hollowell performed 4,661 Medicare services across 3,498 unique beneficiaries.
Between the years covered by Open Payments, Dr. Hollowell received a total of $6,663 from 33 pharmaceutical and/or device companies across 450 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in cardiovascular disease. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Hollowell is Very High — reflecting how much public federal data is available about this provider. This is not a quality rating. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
Medicare Practice Summary
Medicare Utilization ↗Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Electrocardiogram (EKG), 12-lead | 1,336 | $10 | $51 |
| Office visit, established patient (30-39 min) | 988 | $85 | $238 |
| EKG interpretation and report | 528 | $6 | $30 |
| Anticoagulant management of patient taking warfarin | 447 | $7 | $41 |
| Office visit, established patient (20-29 min) | 376 | $61 | $168 |
| Echocardiogram, transthoracic | 283 | $135 | $729 |
| Prothrombin time test (blood clotting) | 117 | $4 | $26 |
| New patient office visit (45-59 min) | 101 | $109 | $310 |
| Blood draw (venipuncture) | 88 | $8 | $17 |
| Hospital follow-up visit, moderate complexity | 55 | $61 | $186 |
| Injection, perflutren lipid microspheres, per ml | 34 | $34 | $352 |
| Heart rhythm recording of continous external ekg over 8-15 days | 32 | $9 | $96 |
| Heart rhythm review and interpretation of continous external ekg over 8-15 days | 32 | $20 | $98 |
| Telephone medical discussion with physician, 5-10 minutes | 32 | $36 | $131 |
| New patient office visit (30-44 min) | 30 | $70 | $207 |
| Office visit, established patient, complex (40-54 min) | 30 | $127 | $335 |
| Initial hospital admission, moderate complexity | 26 | $97 | $352 |
| Heart muscle strain imaging | 25 | $27 | $139 |
| Routine electrocardiogram (ecg) using at least 12 leads with tracing | 15 | $3 | $48 |
| Electrocardiogram (ecg) up to 30 days continuous with review and report by health care professional | 15 | $18 | $130 |
| Ultrasound of heart, follow-up | 13 | $19 | $361 |
| Office visit, established patient (10-19 min) | 13 | $36 | $105 |
| Heart rhythm recording continous external ekg over more than 48 hours up to 7 days | 12 | $9 | $96 |
| Heart rhythm review, and interpretation of continous external ekg over more than 48 hours up to 7 days | 11 | $18 | $98 |
| Ultrasound of heart with color-depicted blood flow, rate and valve function | 11 | $2 | $28 |
| Telephone medical discussion with physician, 11-20 minutes | 11 | $64 | $212 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
Associated products mentioned in payments ›
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This measures how much public data is available about a provider — not how good they are. How we calculate this →
Summary
Dr. Hollowell is a clinical cardiology specialist, with above-average Medicare volume (top 19% in TX), and low-engagement industry engagement, with 20 years of practice experience.
This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →
Frequently Asked Questions
Is Dr. Hollowell experienced with electrocardiogram (ekg), 12-lead?
Does Dr. Hollowell receive payments from pharmaceutical companies?
How do Dr. Hollowell's costs compare to other cardiovascular diseases in Plano?
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Explore related providers
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. The Transparency Score measures data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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