Dr. Stephen B. Williams, MD, MPH
- Medicare services, 2024
- 610
- Medicare patients, 2024
- 236
- Part D claims, 2024
- 103
- Hospital affiliations
- 3
- Industry payments
- $81,138
- Practice address
- 901 Harry S Truman N Dr, Upper Marlboro, MD 20774
- Practice phone
- Call (240) 677-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
UM Capital Region Medical Center
Upper Marlboro, Maryland
Find Dr. Williams' 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 B. Williams is an interventional cardiologist in Upper Marlboro, Maryland
Dr. Williams practices at UM Capital Region Medical Center in Upper Marlboro, Maryland.
Dr. Williams' NPI, 1528131687, was assigned on November 16, 2006. Dr. Williams graduated from Harvard Medical School in 1997. Dr. Williams holds Maryland license D0066599.
- NPI
- 1528131687NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8628013109
- NPI enumeration date
- November 16, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (240) 677-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen B. Williams practices at UM Capital Region Medical Center in Upper Marlboro, Maryland
Dr. Williams' primary practice is UM Capital Region Medical Center, at 901 Harry S Truman N Dr, Upper Marlboro, MD 20774 in Prince Georges County. The practice phone is (240) 677-3000.
- UM Capital Region Medical Center901 Harry S Truman N Dr, Upper Marlboro, MD 20774 · Prince Georges CountyPhone(240) 677-3000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Stephen B. Williams is affiliated with 8 sites of care and 4 medical groups
Dr. Williams' primary practice is UM Capital Region Medical Center in Upper Marlboro, Maryland. Dr. Williams is also affiliated with University of Maryland Capital Region Medical Center. The medical group on file is Capitol Cardiology Associates. Dmand AI also links Dr. Williams to 2 more hospitals, 4 group practices and clinics and 3 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Stephen B. Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williams practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UM Capital Region Medical Center | Available with a free account |
| +7 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen B. Williams is one of 64 interventional cardiologists in Maryland
Interventional cardiology is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207RI0011X. Dr. Williams is licensed in Maryland.
Specialties and state licenses
- Interventional cardiology, MarylandPrimary
Interventional cardiologists near Dr. Williams
Counts of interventional cardiologists 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 B. Williams billed Medicare for 610 services in 2024
CMS data shows 610 Medicare services from Dr. Williams across 14 procedure codes in 2024, for 236 Medicare patients. Medicare paid $75,518 for them.
Dr. Williams' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 3722024: 52541%
- Office and hospital visits
- 2023: 02024: 85
Where Dr. Williams' Medicare services took place, 2024
- In an office7011%
- In a facility54089%
Dr. Williams compared with the Maryland median for interventional cardiologists, 2024
- Dr. Williams
- Maryland median
- Medicare services
- 610vs 1,88268% below
- Medicare patients
- 236vs 84472% below
- Part D claims
- 36vs 60394% below
Medians across 62 interventional cardiologists in Maryland with Dmand AI profiles that report each measure.
Dr. Williams' 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. Williams and other interventional cardiologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen B. Williams treated 236 Medicare patients in 2024, average age 75
CMS counts 236 Medicare patients who saw Dr. Williams in 2024. The largest group is 75 to 84, with 88 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 18% are also on Medicaid. Their average risk score is 1.68, 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. Williams' median patient age at 72, with 41% women.
Dr. Williams' Medicare patients by age, 2024
Dr. Williams' Medicare patients by sex, 2024
- Women10946%
- Men12754%
Chronic conditions among Dr. Williams' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease75%
- Arthritis60%
- Diabetes51%
- Atrial fibrillation47%
- Heart failure47%
- Chronic kidney disease36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Williams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women41%
- Men59%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen B. Williams wrote 103 Medicare Part D claims in 2024
In 2024, Dr. Williams wrote 103 Medicare Part D claims for 24 patients. 92% of them were for generic drugs. CMS names the drug for 36 of them, across 2 drugs with 11 or more claims each, at $459 in total drug cost. In 2022, CMS named 100 claims across 5 drugs.
Dr. Williams' Part D claims by kind of drug, 2024
- Generic95 claims92%
- Brand-name and other8 claims8%
Dr. Williams' 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.
Part D claims for drugs CMS names, 2022 to 2024
- 2022
- 2024
- Claims for drugs CMS names
- 2022: 1002024: 3664%
Drugs named by CMS: 2 in 2024, 5 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
Dr. Stephen B. Williams ranks in the 79th percentile for coronary angioplasty and stenting in Medicare
Dr. Williams accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Williams as offering telehealth. CMS counts 43 procedures of coronary angioplasty and stenting by Dr. Williams, more than 79% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Williams ranks in Medicare procedure volume
- Coronary angioplasty and stenting
- 79th percentile43 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Leg revascularization (restoring blood flow): 1 to 10 procedures (CMS shows small counts as a range)
Pacemaker insertion or repair: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Stephen B. Williams received $81,138 in industry payments from 2016 to 2025
CMS Open Payments shows 147 general payments to Dr. Williams from 24 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 83% of the total. Abbott Laboratories paid the most, $47,495.
General payments to Dr. Williams by program year, 2016 to 2025
General payments to Dr. Williams by kind, 2016 to 2025
- Consulting fees$67,30083%
- Travel and lodging$8,07610%
- Food and beverage$5,0876%
- Speaker and faculty fees$6751%
Companies that paid Dr. Williams 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 B. Williams graduated from Harvard Medical School
Dr. Williams graduated from Harvard Medical School in 1997.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Stephen B. Williams'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 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)Doctors and Clinicians Utilization Data (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 B. Williams
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What is Dr. Stephen B. Williams' NPI number?
Dr. Stephen B. Williams' NPI number is 1528131687. It was assigned on November 16, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen B. Williams?
Dr. Stephen B. Williams is an interventional cardiologist in Upper Marlboro, Maryland. The primary specialty in the NPI Registry is Interventional Cardiology Physician (taxonomy code 207RI0011X).
Where does Dr. Stephen B. Williams practice?
Dr. Williams practices at 901 Harry S Truman N Dr, Upper Marlboro, MD 20774. Dr. Williams' primary practice is UM Capital Region Medical Center in Upper Marlboro, Maryland. Dmand AI also links Dr. Williams to 2 hospitals, 4 group practices and clinics and 3 medical groups.
What is Dr. Stephen B. Williams' office phone number?
The practice phone on file for Dr. Williams is (240) 677-3000.
What is Dr. Stephen B. Williams' medical license number?
Dr. Williams holds Maryland license D0066599.
Which hospitals is Dr. Stephen B. Williams affiliated with?
Dr. Williams is affiliated with University of Maryland Capital Region Medical Center. Dmand AI links Dr. Williams to 2 more hospitals.
What medical group is Dr. Stephen B. Williams part of?
Dr. Williams is linked to Capitol Cardiology Associates. Dmand AI links Dr. Williams to 3 more medical groups.
Does Dr. Stephen B. Williams accept Medicare?
Yes. CMS data shows Dr. Williams billed Medicare for 610 services in 2024, and Dr. Williams accepts Medicare assignment.
Does Dr. Stephen B. Williams offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Williams as offering telehealth services.
How many Medicare patients does Dr. Stephen B. Williams see?
CMS counts 236 Medicare patients who saw Dr. Williams in 2024, with an average age of 75.
Show 5 more questionsShow fewer questions
What services does Dr. Stephen B. Williams bill to Medicare?
In 2024, Dr. Williams' most billed Medicare services were special service (99152), heart test or procedure (93458) and heart test or procedure (92928).
Where did Dr. Stephen B. Williams go to medical school?
Dr. Williams graduated from Harvard Medical School in 1997.
What drugs does Dr. Stephen B. Williams prescribe most?
In 2024 Medicare Part D data, Dr. Williams' most prescribed drugs by claims were Atorvastatin Calcium and Metoprolol Succinate.
Has Dr. Stephen B. Williams received payments from drug or device companies?
CMS Open Payments shows $81,138 in general payments to Dr. Williams from 24 companies from 2016 to 2025. The largest total came from Abbott Laboratories.
How long has Dr. Stephen B. Williams been practicing?
Dr. Williams graduated from medical school in 1997, 29 years ago.
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