Stephen Day, M.D.
NPI 1851397467 · Interventional Cardiology Physician · Alexandria, VA
Enrolled with Medicare as Practitioner - Interventional Cardiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Day, M.D. is a Interventional Cardiology Physician provider in Alexandria, VA (NPI 1851397467).
Provider details
- NPI number
- 1851397467
- Entity type
- Individual
- Primary specialty
- Interventional Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 0101057025 (VA)
Specialties & taxonomies
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
20 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
1,571 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 633 | $141 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 407 | $16 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 92 | $141 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 85 | $18 |
| Insertion of Tube in Left Lower Heart Chamber and Coronary Artery for Diagnosis With Review By Radiologist93458 | 74 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 263 | 79 |
| Metoprolol Succinate | 187 | 68 |
| Apixabanbrand: Eliquis | 135 | 43 |
| Amlodipine Besylate | 110 | 32 |
| Rosuvastatin Calcium | 104 | 39 |
| Furosemide | 102 | 42 |
| Losartan Potassium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$307 across 16 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
- 2005-06-28
- Last updated
- 2022-08-25
- Certified
- 2022-08-25
Frequently asked questions
- What is Stephen Day's NPI number?
- Stephen Day's National Provider Identifier (NPI) is 1851397467, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Day's specialty?
- Stephen Day is listed in the NPPES registry with a primary specialty of Interventional Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Day located?
- Stephen Day's practice location on file with NPPES is 4825 Mark Center Dr Ste 150, Alexandria, VA 22311-1846.
- What is Stephen Day's phone number?
- The practice phone number listed in the NPPES registry for Stephen Day is (703) 751-8111.
- Does Stephen Day accept Medicare?
- Stephen Day is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Day's NPI active?
- Yes — Stephen Day's NPI (1851397467) is active in the NPPES registry as of the last update on 2022-08-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.