Waseem Ismail Aziz, MD
Gastroenterology · Internal Medicine (CMS) · Fairfax, VA
At a glance
3700 Joseph Siewick Dr, Fairfax, VA 22033-1744
Published activity: Colonoscopy · Upper gastrointestinal (GI) endoscopy for acid reflux. View counts and coverage
NPPES record updated Jan 13, 2025. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
3700 Joseph Siewick Dr Suite 401Fairfax, VA 22033-1744
Additional reported practice locations
44045 Riverside PkwyLeesburg, VA 201765101
Phone: 7038586000
Fax: 7038586900 1871 Evelyn Byrd Ave
Harrisonburg, VA 228013487
Phone: 5405645800
Fax: 8335523026 500 Martha Jefferson Dr
Charlottesville, VA 229114668
Phone: 7576545260 2150 Pennsylvania Ave Nw
Washington, DC 200373201
Phone: 2027412227 2815 S Seacrest Blvd
Boynton Beach, FL 334357969
Phone: 5617377733
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 1987
- CMS specialties
- Gastroenterology · Internal Medicine
Practice groups
Reported hospital affiliations
- Inova Alexandria Hospital Alexandria, VA
- Inova Fair Oaks Hospital Fairfax, VA
- Inova Fairfax Hospital Falls Church, VA
- Inova Loudoun Hospital Leesburg, VA
- Inova Mount Vernon Hospital Alexandria, VA
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
| Procedure category | Published Medicare activity |
|---|---|
| Colonoscopy | 64 |
| Upper gastrointestinal (GI) endoscopy for acid reflux | 174 |
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $17.64 |
Reporting companies
| Company | Amount |
|---|---|
| BOSTON SCIENTIFIC CORPORATION | $17.64 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Gastroenterology · Internal Medicine (CMS)
- Taxonomy code
- 207RG0100X
- Enumeration date
- Jul 20, 2006
- Record updated
- Jan 13, 2025
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- MD
Reported taxonomies and licenses
207RG0100X
License reported: ME169652 FL
207RT0003X
License reported: 0101238422 VA
207RG0100X · Primary
License reported: 0101238422 VA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
3700 Joseph Siewick DrSuite 401
Fairfax, VA 22033-1744
- Phone
- (703) 281-1023
- Fax
- (703) 620-2331
Mailing address
714 WALKER RDGREAT FALLS, VA 220662802
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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