Dr. Stephen T. Ong, MD
- Medicare services, 2024
- 1,241
- Medicare patients, 2024
- 197
- Part D claims, 2024
- 2,489
- Clinical trials
- 6
- Industry payments
- $58,765
- Practice address
- 6357 Oxon Hill Rd, Oxon Hill, MD 20745
- Practice phone
- Call (301) 839-2820
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Greater Washington Medicenter T/A Healthcare of Greater Washingto
Oxon Hill, Maryland
Find Dr. Ong'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 T. Ong is a family medicine physician in Oxon Hill, Maryland
Dr. Ong practices at Greater Washington Medicenter T/A Healthcare of Greater Washingto in Oxon Hill, Maryland.
Dr. Ong's NPI, 1851479281, was assigned on November 2, 2006. Dr. Ong holds Maryland license D014760.
- NPI
- 1851479281NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1254492556
- NPI enumeration date
- November 2, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (301) 839-2820
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 82
- Medical school graduation
- 1970
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen T. Ong practices at Greater Washington Medicenter T/A Healthcare of Greater Washingto in Oxon Hill, Maryland
Dr. Ong's primary practice is Greater Washington Medicenter T/A Healthcare of Greater Washingto, at 6357 Oxon Hill Rd, Oxon Hill, MD 20745 in Prince Georges County. The practice phone is (301) 839-2820.
- Greater Washington Medicenter T/A Healthcare of Greater Washingto6357 Oxon Hill Rd, Oxon Hill, MD 20745 · Prince Georges CountyPhone(301) 839-2820
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Stephen T. Ong is affiliated with 2 sites of care and 1 medical group
Dr. Ong's primary practice is Greater Washington Medicenter T/A Healthcare of Greater Washingto in Oxon Hill, Maryland. The medical group on file is Healthcare of Greater Washington. Dmand AI also links Dr. Ong 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 T. Ong's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ong practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greater Washington Medicenter T/A Healthcare of Greater Washingto | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Stephen T. Ong is one of 1,698 family medicine physicians in Maryland
Family medicine is Dr. Ong's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dmand AI has Dr. Ong's licenses on file in 2 states: Maryland and District of Columbia.
Specialties and state licenses
- Family medicine, MarylandPrimary
- Surgery, District of Columbia
Family medicine physicians near Dr. Ong
Counts of family medicine physicians 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 T. Ong billed Medicare for 1,241 services in 2024
CMS data shows 1,241 Medicare services from Dr. Ong across 10 procedure codes in 2024, for 197 Medicare patients. Medicare paid $90,866 for them. Every service was in an office.
Dr. Ong's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5562024: 62512%
- Other services
- 2023: 4622024: 4794%
- Tests and treatments
- 2023: 1892024: 13728%
Dr. Ong compared with the Maryland median for family medicine physicians, 2024
- Dr. Ong
- Maryland median
- Medicare services
- 1,241vs 5162.4 times
- Medicare patients
- 197vs 2085% below
- Part D claims
- 2,018vs 7512.7 times
Medians across 1,659 family medicine physicians in Maryland with Dmand AI profiles that report each measure.
Dr. Ong'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. Ong?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ong and other family medicine physicians in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen T. Ong treated 197 Medicare patients in 2024, average age 76
CMS counts 197 Medicare patients who saw Dr. Ong in 2024. The largest group is 75 to 84, with 90 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.14, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ong's median patient age at 65, with 46% women.
Dr. Ong's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Ong's Medicare patients by sex, 2024
- Women10352%
- Men9448%
Chronic conditions among Dr. Ong's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis57%
- Chronic kidney disease47%
- Diabetes46%
- Ischemic heart disease22%
- Cancer21%
- Mood disorders20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ong's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women46%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen T. Ong wrote 2,489 Medicare Part D claims in 2024
In 2024, Dr. Ong wrote 2,489 Medicare Part D claims for 192 patients. 88% of them were for generic drugs. CMS names the drug for 2,018 of them, across 54 drugs with 11 or more claims each, at $209,355 in total drug cost. In 2023, CMS named 1,014 claims across 41 drugs.
Dr. Ong's Part D claims by kind of drug, 2024
- Generic2,188 claims88%
- Brand-name and other301 claims12%
Dr. Ong'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. Ong's Part D claims, 2024
- Opioids1%17 of 2,489 claims
- Antibiotics3%63 of 2,489 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: 1,0142024: 2,01899%
Drugs named by CMS: 54 in 2024, 41 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
How Dr. Stephen T. Ong takes part in Medicare
Dr. Ong accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Stephen T. Ong has worked on 6 clinical trials
Dmand AI links Dr. Ong to 6 clinical trials. 1 is still active or recruiting. Conditions studied include Diabetes Mellitus, Type 2, Hyperlipidemias and Alzheimer Disease. Eli Lilly and Company sponsors the most, 3. Open Payments lists research payments to Dr. Ong that name 7 trials.
Conditions in Dr. Ong's trials
- Diabetes Mellitus, Type 2
- Hyperlipidemias
- Alzheimer Disease
- Hypercholesterolemia
- Hyperlipoproteinemias
Investigators on the most trials with Dr. Ong
- Richard S. Cherlin, MD3 shared trials
- Amer S. Al-Karadsheh, MD2 shared trials
- Jose Francisco Cardona, MD2 shared trials
Recent clinical trials with Dr. Ong
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; ClinicalTrials.gov (National Library of Medicine); and Dmand AI Research Linkage
Dr. Stephen T. Ong received $58,765 in industry payments from 2016 to 2025
CMS Open Payments shows 1,081 general payments to Dr. Ong from 62 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 67% of the total. Novo Nordisk Inc paid the most, $7,099. It also lists 57 research payments totaling $254,825 from 2016 to 2024, naming 7 clinical trials.
General payments to Dr. Ong by program year, 2016 to 2025
General payments to Dr. Ong by kind, 2016 to 2025
- Food and beverage$39,23667%
- Travel and lodging$18,79032%
- Consulting fees$5121%
- Education$1160%
- Gifts$1110%
Companies that paid Dr. Ong the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Stephen T. Ong'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Clinical trials and co-investigators | ClinicalTrials.gov (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 T. Ong
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 T. Ong's NPI number?
Dr. Stephen T. Ong's NPI number is 1851479281. It was assigned on November 2, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen T. Ong?
Dr. Stephen T. Ong is a family medicine physician in Oxon Hill, Maryland. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Stephen T. Ong practice?
Dr. Ong practices at 6357 Oxon Hill Rd, Oxon Hill, MD 20745. Dr. Ong's primary practice is Greater Washington Medicenter T/A Healthcare of Greater Washingto in Oxon Hill, Maryland. Dmand AI also links Dr. Ong to 1 group practice or clinic.
What is Dr. Stephen T. Ong's office phone number?
The practice phone on file for Dr. Ong is (301) 839-2820.
What is Dr. Stephen T. Ong's medical license number?
Dr. Ong holds Maryland license D014760, one of the licenses on file in 2 states.
Which states has Dr. Stephen T. Ong been licensed in?
Dmand AI has state licenses on file for Dr. Ong in Maryland and District of Columbia.
What medical group is Dr. Stephen T. Ong part of?
Dr. Ong is linked to Healthcare of Greater Washington.
Does Dr. Stephen T. Ong accept Medicare?
Yes. CMS data shows Dr. Ong billed Medicare for 1,241 services in 2024, and Dr. Ong accepts Medicare assignment.
How many Medicare patients does Dr. Stephen T. Ong see?
CMS counts 197 Medicare patients who saw Dr. Ong in 2024, with an average age of 76.
What services does Dr. Stephen T. Ong bill to Medicare?
In 2024, Dr. Ong's most billed Medicare services were office visit, established patient (99214), medicare service (G0442) and medicare service (G0439).
Show 4 more questionsShow fewer questions
What drugs does Dr. Stephen T. Ong prescribe most?
In 2024 Medicare Part D data, Dr. Ong's most prescribed drugs by claims were Amlodipine Besylate, Atorvastatin Calcium and Allopurinol.
Has Dr. Stephen T. Ong received payments from drug or device companies?
CMS Open Payments shows $58,765 in general payments to Dr. Ong from 62 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Stephen T. Ong been practicing?
Dr. Ong graduated from medical school in 1970, 56 years ago.
Does Dr. Stephen T. Ong do research?
Dr. Ong has worked on 6 clinical trials.
Selling to family medicine practices?
See family medicine physicians in Maryland by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card