Dr. Stephen T. Ong, MD

  • Oxon Hill, MD
  • Family medicine physician
NPI1851479281PAC ID1254492556
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
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Personal email
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Mobile number
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Social profiles

Primary practice

Greater Washington Medicenter T/A Healthcare of Greater Washingto

Oxon Hill, Maryland

See all 3 affiliations

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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 and contact details
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
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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 Washingto
    6357 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.

Greater Washington Medicenter T/A Healthcare of Greater WashingtoOxon Hill, MarylandPrimary
Healthcare of Greater WashingtonPrimary care group, Oxon Hill, MD1 group practice or clinicName with a free account
See all 3 affiliations for Dr. Ong

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.

EHR by site
SiteEHR vendor and product
Greater Washington Medicenter T/A Healthcare of Greater WashingtoAvailable with a free account
+1 more affiliated siteAvailable with a free account

Source: Dmand AI Technology Install Data

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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, MarylandPrimaryLicense D014760 · taxonomy 207Q00000X
  • Surgery, District of ColumbiaLicense MD6423 · taxonomy 208600000X

Family medicine physicians near Dr. Ong

Counts of family medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.

1,698family medicine physicians in Maryland
4family medicine physicians in Oxon Hill

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.

Medicare services, 20241,241
Medicare patients197
Paid by Medicare$90,866
Procedure codes10

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.

See all procedures by Dr. Ong

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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.

Medicare patients, 2024197
Average age76
Average risk score1.14

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

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis57%
  4. Chronic kidney disease47%
  5. Diabetes46%
  6. Ischemic heart disease22%
  7. Cancer21%
  8. 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.

Part D claims, 20242,489
Drugs named by CMS54
Total drug cost$209,355
Part D patients192

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.

See all prescribing by Dr. Ong

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)

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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

Recent clinical trials with Dr. Ong

See all 6 clinical trials and co-investigators

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

$58.8Kin total
  • 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.

See all payments to Dr. Ong

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Sources for Dr. Stephen T. Ong's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Clinical trials and co-investigatorsClinicalTrials.gov (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand 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.

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