DR. STEPHEN ONG MD
NPI 1851479281
Family Medicine in Oxon Hill, MD
About Dr. Stephen Ong Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. STEPHEN ONG MD (NPI 1851479281) is an individual family medicine provider in Oxon Hill, Maryland, licensed in Maryland (D014760) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1970).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Stephen Ong Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Stephen Ong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Oxon Hill, MD 20745
- Reassigned Medicare billing, District of Columbia enrollment
- 7 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 10
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20745 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
OXON HILL, MD 20745
OXON HILL, MD 20745
OXON HILL, MD 20745
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Stephen Ong's NPI number?
The NPI number for Stephen Ong is 1851479281. It was assigned to this individual provider in the NPPES registry on November 2, 2006.
Where is Stephen Ong located?
Stephen Ong practices at 6357 Oxon Hill Rd, Oxon Hill, MD 20745. The listed phone number is (301) 839-2700.
What is Stephen Ong's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Stephen Ong enrolled in Medicare?
Yes. Stephen Ong is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Stephen Ong's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Ong reassigns Medicare benefits to Greater Washington Medicenter LLC. T/A Healthcare Of Greater Washingto (Oxon Hill, MD). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Stephen Ong's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Stephen Ong was last updated on May 10, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Stephen Ong, MD · NPI 1851479281
Family Medicine physician in Oxon Hill, Maryland. Individual provider, active in the CMS NPPES registry since November 2, 2006.
## Identity
- **NPI:** 1851479281 (Entity type: Individual)
- **Enumerated:** November 2, 2006
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** D014760 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 6357 OXON HILL RD, Oxon Hill, MD 20745-2214
- **Phone:** (301) 839-2700 · **Fax:** (301) 839-1354
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Greater Washington Medicenter LLC. T/A Healthcare Of Greater Washingto (NPI 1366517013, Oxon Hill, MD), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1970
## Record status
- **NPPES last updated:** May 10, 2011
- **Other identifiers:** Other 000Z87G33 (MD); Medicare UPIN C87769
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Source: [NPI Profile](https://npiprofile.com/npi/1851479281) · Data from the CMS NPPES public registry.