Stephen Vaccarezza, M.D.
Nephrology Physician · Rockville, MD
Stephen Vaccarezza, M.D. is a nephrology physician with a practice address in Rockville, Maryland, and NPI 1861488314, issued on Sep 21, 2005. Check the license (Maryland D35103, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Stephen Vaccarezza
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- D35103 MD
Self-reported in NPPES; status is on the state search - Practice location
- 6240 Montrose RD, Rockville, MD 20852
- Phone
- (301) 231-7111
- Enumerated
- Sep 21, 2005
- Record last updated
- Oct 31, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (301) 231-9040
- Medicaid ID
- 282111700 MD
- Medicare enrollment
- Enrolled (PECOS I20090529000109); accepts Medicare assignment
- Medical or professional school
- University Of Chicago, Pritzker School Of Medicine, 1981
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 6240 Montrose RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stephen Hellman, M.D.Nephrology Physician1942296926
- Jeffrey Perlmutter, M.D.Nephrology Physician1588651889
Verify Stephen Vaccarezza in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D35103Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% fewer Medicare Part D claims than the average nephrology physician in 2024
1,445 Medicare Part D claims for 178 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Calcium Acetate85 claims
- Amlodipine Besylate83 claims
- Carvedilol64 claims
- Furosemide61 claims
- Losartan Potassium58 claims
- Lisinopril52 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $908.95
42 payments; by number, the most common kind was food and beverage; the largest payer was Ardelyx, Inc. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Nephrology Associates OF Montgomery CountyRockville, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nephrology Physician providers in Maryland
There are 337 nephrology physician records in Maryland.
Other nephrology physician records in Maryland
- Hashim AbbasBaltimore, MD1396171070
- Kevin Abbott, MDBethesda, MD1730289133
- Hossam Abdalla, M.D.Glen Burnie, MD1285031765
- Marwa Abdalla, MBBSWaldorf, MD1851852768
- Jacques Abi Rached, MDBaltimore, MD1790920577
- Farah Abifaraj, MDBaltimore, MD1104352962
- Veena Acharya, MDBel Air, MD1285842211
- Rohini Adhikarla, M.DLutherville Timonium, MD1316146863
- Muzna Adil, M.D.Suitland, MD1780870618
- Harsha Adnani, MDAnnapolis, MD1437738838
Common questions
What is Stephen Vaccarezza, M.D.'s NPI number?
Stephen Vaccarezza, M.D.'s National Provider Identifier (NPI) is 1861488314, issued on Sep 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Vaccarezza, M.D. located?
The NPPES record lists a practice address at 6240 Montrose RD, Rockville, MD, 20852. Phone: (301) 231-7111. Providers update this record themselves, so call before visiting.
How can I verify Stephen Vaccarezza, M.D.'s license?
NPPES lists Maryland license number D35103, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Stephen Vaccarezza, M.D. prescribe under Medicare Part D?
In 2024, Stephen Vaccarezza, M.D. had 1,445 Medicare Part D claims for 178 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.