Dr. Gregory Greenwood, M.D.
What this data tells you about Dr. Greenwood
Dr. Gregory Greenwood is an internal medicine specialist in Winston-Salem, NC, with 21 years of NPI registration. Based on federal Medicare data, Dr. Greenwood performed 1,555 Medicare services across 712 unique beneficiaries.
Between the years covered by Open Payments, Dr. Greenwood received a total of $777,393 from 50 pharmaceutical and/or device companies across 1672 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in internal medicine. The majority of payments are for speaking programs and promotional activities, reflecting participation in industry-sponsored events. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Greenwood is Very High — reflecting how much public federal data is available about this provider. 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 |
|---|---|---|---|
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
380 | $61 | $125 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
320 | $58 | $183 |
| Hemodialysis, single evaluation A dialysis procedure to filter waste from the blood, performed with a physician's evaluation. |
223 | $55 | $125 |
| Dialysis services for patients 20 or older Dialysis treatment provided to patients aged 20 years or older, involving four or more physician visits per month. |
209 | $274 | $488 |
| Home dialysis services per month Monthly dialysis treatment provided in the patient's home for individuals aged 20 or older. |
130 | $227 | $409 |
| Dialysis procedure with evaluation A dialysis treatment that includes one evaluation. |
99 | $66 | $147 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
95 | $132 | $349 |
| New patient office visit, complex (60-74 min) | 26 | $159 | $352 |
| Removal of tunneled central venous tube This procedure involves the removal of a catheter that has been surgically placed under the skin and threaded into a large vein. |
18 | $127 | $284 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
16 | $39 | $122 |
| Insertion of non-tunneled central venous catheter A procedure to place a central venous catheter for infusion in patients aged 5 years or older. The catheter is inserted directly into a large vein without being tunneled under the skin. |
13 | $65 | $397 |
| Dialysis services for adults, 2-3 visits per month This code covers dialysis services for patients aged 20 or older who have 2 to 3 physician visits per month. |
13 | $228 | $410 |
| Hospital follow-up visit, high complexity Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter. |
13 | $93 | $179 |
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)
All-time payments by company (2018-2024) ›
Associated products mentioned in payments ›
The majority of payments (98%) are for speaking programs and promotional activities, which reflect participation in industry-sponsored educational or marketing events. This is common in internal medicine and does not inherently indicate bias, but patients may wish to be aware. Total industry engagement is in the top 0% for internal medicine in NC.
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 reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Greenwood is a clinical cardiology specialist, with above-average Medicare volume (top 22% in NC), with speaking/promotional industry engagement in the top 0% of NC peers, with 21 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
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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. Data Coverage reflects 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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