Joseph Delio
Internal Medicine · Pulmonary Disease (CMS) · Washington, DC
At a glance
900 23Rd St Nw, Washington, DC 20037-2342
NPPES record updated Apr 17, 2023. 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
900 23Rd St NwWashington, DC 20037-2342
Additional reported practice locations
3300 Gallows RdFalls Church, VA 220423307
Phone: 7037763582 4320 Seminary Rd
Alexandria, VA 223041535
Phone: 7035043000
Fax: 7035043388 2501 Parkers Ln
Alexandria, VA 223063209
Phone: 7036647000
Fax: 7036647666 8110 Gatehouse Rd Ste 600W
Falls Church, VA 220421210
Phone: 7032898600
Fax: 7032898624 44045 Riverside Pkwy
Leesburg, VA 201765101
Phone: 7038586000
Fax: 7038586900 3600 Joseph Siewick Dr
Fairfax, VA 220331709
Phone: 7033913600
Fax: 7033913414
Education & affiliations
- Medical / professional school
- George Washington University School Of Medicine
- Graduation year
- 2014
- CMS specialties
- Internal Medicine · Pulmonary Disease
Practice groups
Reported hospital affiliations
- Holy Cross Hospital Silver Spring, MD
- Inova Fair Oaks Hospital Fairfax, VA
- Inova Fairfax Hospital Falls Church, 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.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
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
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
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
- Internal Medicine · Pulmonary Disease (CMS)
- Taxonomy code
- 207LC0200X
- Enumeration date
- Apr 9, 2014
- Record updated
- Apr 17, 2023
More registry details
- Provider type
- Individual · Type 1
Reported taxonomies and licenses
207R00000X
License reported: 0101260975 VA
207RC0200X
License reported: MD043886 DC
208M00000X
License reported: 0101260975 VA
207LC0200X · Primary
License reported: MD043886 DC
207RP1001X
License reported: 0101260975 VA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
900 23Rd St NwWashington, DC 20037-2342
- Phone
- (202) 715-4750
Mailing address
PO BOX 37174BALTIMORE, MD 212973174
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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