Stephen Vaccarezza, M.D.
NPI 1861488314 · Nephrology Physician · Rockville, MD
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Vaccarezza, M.D. is a Nephrology Physician provider in Rockville, MD (NPI 1861488314).
Provider details
- NPI number
- 1861488314
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D35103 (MD)
Specialties & taxonomies
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
1,454 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 524 | $77 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 311 | $395 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 172 | $79 |
| Manual Urinalysis Test With Examination Using Microscope, Non-Automated81000 | 78 | $4 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 76 | $184 |
| Home Dialysis Services Per Month (20 Years Or Older)90966 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 39 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Calcium Acetate | 85 | 32 |
| Amlodipine Besylate | 83 | 26 |
| Carvedilol | 64 | 23 |
| Furosemide | 61 | 22 |
| Losartan Potassium | 58 | 17 |
| Lisinopril | 52 | — |
| Atorvastatin Calcium | 50 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$909 across 42 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
- 2005-09-21
- Last updated
- 2011-10-31
Frequently asked questions
- What is Stephen Vaccarezza's NPI number?
- Stephen Vaccarezza's National Provider Identifier (NPI) is 1861488314, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Vaccarezza's specialty?
- Stephen Vaccarezza is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Vaccarezza located?
- Stephen Vaccarezza's practice location on file with NPPES is 6240 Montrose Rd, Rockville, MD 20852-4119.
- What is Stephen Vaccarezza's phone number?
- The practice phone number listed in the NPPES registry for Stephen Vaccarezza is (301) 231-7111.
- Does Stephen Vaccarezza accept Medicare?
- Stephen Vaccarezza is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Vaccarezza's NPI active?
- Yes — Stephen Vaccarezza's NPI (1861488314) is active in the NPPES registry as of the last update on 2011-10-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.