Dr. Stephen Vaccarezza, MD
- Medicare services, 2024
- 1,454
- Medicare patients, 2024
- 455
- Part D claims, 2024
- 1,445
- Hospital affiliations
- 6
- Industry payments
- $5,860
- Practice address
- 20111 Century Boulevard, Ste C, Germantown, MD 20874
- Practice phone
- Call (253) 272-1916
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
DaVita Germantown Dialysis
Dialysis Center - Independent · Germantown, Maryland
Find Dr. Vaccarezza's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Stephen Vaccarezza is a nephrologist in Germantown, Maryland
Dr. Vaccarezza practices at DaVita Germantown Dialysis in Germantown, Maryland.
Dr. Vaccarezza's NPI, 1861488314, was assigned on September 21, 2005. Dr. Vaccarezza graduated from University of Chicago, Pritzker School of Medicine in 1981. Dr. Vaccarezza holds Maryland license D35103.
- NPI
- 1861488314NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6204985971
- NPI enumeration date
- September 21, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (253) 272-1916
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen Vaccarezza practices at DaVita Germantown Dialysis in Germantown, Maryland
Dr. Vaccarezza's primary practice is DaVita Germantown Dialysis, at 20111 Century Boulevard, Ste C, Germantown, MD 20874 in Montgomery County. The practice phone is (253) 272-1916.
- DaVita Germantown Dialysis20111 Century Boulevard, Ste C, Germantown, MD 20874 · Montgomery CountyPhone(253) 272-1916
Source: Dmand AI Affiliation Data
Dr. Stephen Vaccarezza is affiliated with 13 sites of care and 1 medical group
Dr. Vaccarezza's primary practice is DaVita Germantown Dialysis in Germantown, Maryland. Dr. Vaccarezza is also affiliated with Holy Cross Germantown Hospital. The medical group on file is Nephrology Associates of Montgomery County. Dmand AI also links Dr. Vaccarezza to 5 more hospitals, 4 dialysis centers, 1 group practice or clinic and 1 home health agency, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Stephen Vaccarezza's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Vaccarezza practices, 13 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| DaVita Germantown Dialysis | Available with a free account |
| +12 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen Vaccarezza is one of 279 nephrologists in Maryland
Nephrology is Dr. Vaccarezza's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Vaccarezza is licensed in Maryland.
Specialties and state licenses
- Nephrology, MarylandPrimary
Nephrologists near Dr. Vaccarezza
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Stephen Vaccarezza billed Medicare for 1,454 services in 2024
CMS data shows 1,454 Medicare services from Dr. Vaccarezza across 12 procedure codes in 2024, for 455 Medicare patients. Medicare paid $190,746 for them.
Dr. Vaccarezza's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,0512024: 85019%
- Tests and treatments
- 2023: 5782024: 50413%
- Lab and pathology
- 2023: 992024: 7821%
- Other services
- 2023: 02024: 22
Where Dr. Vaccarezza's Medicare services took place, 2024
- In an office1,20783%
- In a facility24717%
Dr. Vaccarezza compared with the Maryland median for nephrologists, 2024
- Dr. Vaccarezza
- Maryland median
- Medicare services
- 1,454vs 1,392Close to median
- Medicare patients
- 455vs 4179% above
- Part D claims
- 1,120vs 4722.4 times
Medians across 268 nephrologists in Maryland with Dmand AI profiles that report each measure.
Dr. Vaccarezza's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Vaccarezza?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Vaccarezza and other nephrologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen Vaccarezza treated 455 Medicare patients in 2024, average age 76
CMS counts 455 Medicare patients who saw Dr. Vaccarezza in 2024. The largest group is 75 to 84, with 188 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 20% are also on Medicaid. Their average risk score is 2.93, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Vaccarezza's median patient age at 73, with 43% women.
Dr. Vaccarezza's Medicare patients by age, 2024
Dr. Vaccarezza's Medicare patients by sex, 2024
- Women20144%
- Men25456%
Chronic conditions among Dr. Vaccarezza's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes56%
- Arthritis47%
- Ischemic heart disease42%
- Heart failure29%
- Mood disorders28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Vaccarezza's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women43%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen Vaccarezza wrote 1,445 Medicare Part D claims in 2024
In 2024, Dr. Vaccarezza wrote 1,445 Medicare Part D claims for 178 patients. 87% of them were for generic drugs. CMS names the drug for 1,120 of them, across 39 drugs with 11 or more claims each, at $124,116 in total drug cost. In 2023, CMS named 876 claims across 30 drugs.
Dr. Vaccarezza's Part D claims by kind of drug, 2024
- Generic1,257 claims87%
- Brand-name and other188 claims13%
Dr. Vaccarezza's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Vaccarezza's Part D claims, 2024
- Opioids1%11 of 1,445 claims
- Antibiotics1%20 of 1,445 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 8762024: 1,12028%
Drugs named by CMS: 39 in 2024, 30 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Stephen Vaccarezza offers telehealth to Medicare patients
Dr. Vaccarezza accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Vaccarezza as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Stephen Vaccarezza received $5,860 in industry payments from 2016 to 2025
CMS Open Payments shows 247 general payments to Dr. Vaccarezza from 32 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 89% of the total. Relypsa, Inc. paid the most, $1,623.
General payments to Dr. Vaccarezza by program year, 2016 to 2025
General payments to Dr. Vaccarezza by kind, 2016 to 2025
- Food and beverage$5,24489%
- Education$4167%
- Speaker and faculty fees$2003%
Companies that paid Dr. Vaccarezza the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stephen Vaccarezza graduated from University of Chicago, Pritzker School of Medicine
Dr. Vaccarezza graduated from University of Chicago, Pritzker School of Medicine in 1981.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Stephen Vaccarezza's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Stephen Vaccarezza
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Stephen Vaccarezza's NPI number?
Dr. Stephen Vaccarezza's NPI number is 1861488314. It was assigned on September 21, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen Vaccarezza?
Dr. Stephen Vaccarezza is a nephrologist in Germantown, Maryland. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Stephen Vaccarezza practice?
Dr. Vaccarezza practices at 20111 Century Boulevard, Ste C, Germantown, MD 20874. Dr. Vaccarezza's primary practice is DaVita Germantown Dialysis in Germantown, Maryland. Dmand AI also links Dr. Vaccarezza to 5 hospitals, 4 dialysis centers, 1 group practice or clinic and 1 home health agency.
What is Dr. Stephen Vaccarezza's office phone number?
The practice phone on file for Dr. Vaccarezza is (253) 272-1916.
What is Dr. Stephen Vaccarezza's medical license number?
Dr. Vaccarezza holds Maryland license D35103.
Which hospitals is Dr. Stephen Vaccarezza affiliated with?
Dr. Vaccarezza is affiliated with Holy Cross Germantown Hospital. Dmand AI links Dr. Vaccarezza to 5 more hospitals.
What medical group is Dr. Stephen Vaccarezza part of?
Dr. Vaccarezza is linked to Nephrology Associates of Montgomery County.
Does Dr. Stephen Vaccarezza accept Medicare?
Yes. CMS data shows Dr. Vaccarezza billed Medicare for 1,454 services in 2024, and Dr. Vaccarezza accepts Medicare assignment.
Does Dr. Stephen Vaccarezza offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Vaccarezza as offering telehealth services.
How many Medicare patients does Dr. Stephen Vaccarezza see?
CMS counts 455 Medicare patients who saw Dr. Vaccarezza in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Dr. Stephen Vaccarezza bill to Medicare?
In 2024, Dr. Vaccarezza's most billed Medicare services were office visit, established patient (99213), dialysis (90960) and hospital inpatient care (99232).
Where did Dr. Stephen Vaccarezza go to medical school?
Dr. Vaccarezza graduated from University of Chicago, Pritzker School of Medicine in 1981.
What drugs does Dr. Stephen Vaccarezza prescribe most?
In 2024 Medicare Part D data, Dr. Vaccarezza's most prescribed drugs by claims were Calcium Acetate, Amlodipine Besylate and Carvedilol.
Has Dr. Stephen Vaccarezza received payments from drug or device companies?
CMS Open Payments shows $5,860 in general payments to Dr. Vaccarezza from 32 companies from 2016 to 2025. The largest total came from Relypsa, Inc.
How long has Dr. Stephen Vaccarezza been practicing?
Dr. Vaccarezza graduated from medical school in 1981, 45 years ago.
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