Nicholas Xenopoulos, MD
NPI 1568548006 · Interventional Cardiology Physician · Knoxville, TN
Enrolled with Medicare as Practitioner - Interventional Cardiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nicholas Xenopoulos, MD is a Interventional Cardiology Physician provider in Knoxville, TN (NPI 1568548006).
Provider details
- NPI number
- 1568548006
- Entity type
- Individual
- Primary specialty
- Interventional Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 32179 (KY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
5,436 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 1,213 | $7 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 710 | $117 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 583 | $64 |
| Anticoagulant Management of Patient Taking Warfarin93793 | 317 | $10 |
| Blood Test, Clotting Time85610 | 303 | $4 |
| Use of a Drug to Induce Depression of Consciousness By Physician Performing a Procedure (5 Years Or Older), Initial 15 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 44 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 306 | 96 |
| Losartan Potassium | 284 | 111 |
| Rosuvastatin Calcium | 277 | 107 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 271 | 99 |
| Metoprolol Succinate | 224 | 89 |
| Atorvastatin Calcium | 222 | 78 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$42 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-27
- Last updated
- 2021-04-09
- Certified
- 2021-04-09
Frequently asked questions
- What is Nicholas Xenopoulos's NPI number?
- Nicholas Xenopoulos's National Provider Identifier (NPI) is 1568548006, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Xenopoulos's specialty?
- Nicholas Xenopoulos is listed in the NPPES registry with a primary specialty of Interventional Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is Nicholas Xenopoulos located?
- Nicholas Xenopoulos's practice location on file with NPPES is 9330 Park West Blvd, Knoxville, TN 37923-4308.
- What is Nicholas Xenopoulos's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Xenopoulos is (865) 691-4850.
- Does Nicholas Xenopoulos accept Medicare?
- Nicholas Xenopoulos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nicholas Xenopoulos's NPI active?
- Yes — Nicholas Xenopoulos's NPI (1568548006) is active in the NPPES registry as of the last update on 2021-04-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.