Dr. Stephen M. Zemel, MD
- Medicare services, 2024
- 20
- Medicare patients, 2024
- 21
- Part D claims, 2024
- 15
- Industry payments
- $1,551
- Affiliated sites
- 1
- Practice address
- 1589 Sulphur Spring Rd, Halethorpe, MD 21227
- Practice phone
- Call (410) 590-4615
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Pasadena Dialysis
Halethorpe, Maryland
Find Dr. Zemel'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 M. Zemel is a nephrologist in Halethorpe, Maryland
Dr. Zemel practices at Pasadena Dialysis in Halethorpe, Maryland.
Dr. Zemel's NPI, 1568460822, was assigned on July 12, 2005. Dr. Zemel graduated from University of Maryland School of Medicine in 1977. Dr. Zemel holds Maryland license D21225.
- NPI
- 1568460822NPI Registry (opens in a new tab)
- NPI enumeration date
- July 12, 2005
- NPI status
- Active
- Practice phone
- (410) 590-4615
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 75
- Medical school graduation
- 1977
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Stephen M. Zemel practices at Pasadena Dialysis in Halethorpe, Maryland
Dr. Zemel's primary practice is Pasadena Dialysis, at 1589 Sulphur Spring Rd, Halethorpe, MD 21227 in Baltimore County. The practice phone is (410) 590-4615.
- Pasadena Dialysis1589 Sulphur Spring Rd, Halethorpe, MD 21227 · Baltimore CountyPhone(410) 590-4615
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Stephen M. Zemel is affiliated with 2 sites of care and 1 medical group
Dr. Zemel's primary practice is Pasadena Dialysis in Halethorpe, Maryland. The medical group on file is Mid-Atlantic Nephrology Associates. Dmand AI also links Dr. Zemel to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Stephen M. Zemel's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zemel practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Pasadena Dialysis | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen M. Zemel is one of 279 nephrologists in Maryland
Nephrology is Dr. Zemel's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Zemel is licensed in Maryland.
Specialties and state licenses
- Nephrology, MarylandPrimary
Nephrologists near Dr. Zemel
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 M. Zemel billed Medicare for 20 services in 2024
CMS data shows 20 Medicare services from Dr. Zemel across 1 procedure code in 2024, for 21 Medicare patients. Medicare paid $5,371 for them. Every service was in an office.
Dr. Zemel's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 2552024: 2092%
Dr. Zemel compared with the Maryland median for nephrologists, 2024
- Dr. Zemel
- Maryland median
- Medicare services
- 20vs 1,39299% below
- Medicare patients
- 21vs 41795% below
- Part D claims
- 13vs 47297% below
Medians across 268 nephrologists in Maryland with Dmand AI profiles that report each measure.
Dr. Zemel'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zemel and other nephrologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen M. Zemel treated 21 Medicare patients in 2024, average age 76
CMS counts 21 Medicare patients who saw Dr. Zemel in 2024. 75% of them have chronic kidney disease, and 75% have high blood pressure. Their average risk score is 9.28, 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. Zemel's median patient age at 66, with 39% women.
Chronic conditions among Dr. Zemel's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Heart failure71%
- Diabetes62%
- Ischemic heart disease57%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zemel's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women39%
- Men58%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen M. Zemel wrote 15 Medicare Part D claims in 2024
In 2024, Dr. Zemel wrote 15 Medicare Part D claims. 100% of them were for generic drugs. CMS names the drug for 13 of them, across 1 drug with 11 or more claims each, at $58 in total drug cost. In 2022, CMS named 13 claims across 1 drug.
Dr. Zemel's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 132023: 13No change
Drugs named by CMS: 1 in 2023, 1 in 2022.
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
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Dr. Stephen M. Zemel received $1,551 in industry payments from 2016 to 2022
CMS Open Payments shows 24 general payments to Dr. Zemel from 10 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 94% of the total. Baxter Healthcare paid the most, $415.
General payments to Dr. Zemel by program year, 2016 to 2022
General payments to Dr. Zemel by kind, 2016 to 2022
- Food and beverage$1,45094%
- Education$1016%
Companies that paid Dr. Zemel the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stephen M. Zemel graduated from University of Maryland School of Medicine
Dr. Zemel graduated from University of Maryland School of Medicine in 1977.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Stephen M. Zemel'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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) |
| 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 M. Zemel
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 M. Zemel's NPI number?
Dr. Stephen M. Zemel's NPI number is 1568460822. It was assigned on July 12, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen M. Zemel?
Dr. Stephen M. Zemel is a nephrologist in Halethorpe, Maryland. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Stephen M. Zemel practice?
Dr. Zemel practices at 1589 Sulphur Spring Rd, Halethorpe, MD 21227. Dr. Zemel's primary practice is Pasadena Dialysis in Halethorpe, Maryland. Dmand AI also links Dr. Zemel to 1 group practice or clinic.
What is Dr. Stephen M. Zemel's office phone number?
The practice phone on file for Dr. Zemel is (410) 590-4615.
What is Dr. Stephen M. Zemel's medical license number?
Dr. Zemel holds Maryland license D21225.
What medical group is Dr. Stephen M. Zemel part of?
Dr. Zemel is linked to Mid-Atlantic Nephrology Associates.
Does Dr. Stephen M. Zemel accept Medicare?
Yes. CMS data shows Dr. Zemel billed Medicare for 20 services in 2024.
How many Medicare patients does Dr. Stephen M. Zemel see?
CMS counts 21 Medicare patients who saw Dr. Zemel in 2024, with an average age of 76.
What services does Dr. Stephen M. Zemel bill to Medicare?
In 2024, Dr. Zemel's most billed Medicare services were dialysis (90960).
Where did Dr. Stephen M. Zemel go to medical school?
Dr. Zemel graduated from University of Maryland School of Medicine in 1977.
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What drugs does Dr. Stephen M. Zemel prescribe most?
In 2023 Medicare Part D data, Dr. Zemel's most prescribed drugs by claims were Omeprazole.
Has Dr. Stephen M. Zemel received payments from drug or device companies?
CMS Open Payments shows $1,551 in general payments to Dr. Zemel from 10 companies from 2016 to 2022. The largest total came from Baxter Healthcare.
How long has Dr. Stephen M. Zemel been practicing?
Dr. Zemel graduated from medical school in 1977, 49 years ago.
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