Ace Lipson, M.D.
Endocrinology · Internal Medicine (CMS) · Washington, DC
At a glance
1120 19Th St Nw Ste 200, Washington, DC 20036-3615
NPPES record updated Jul 8, 2007. 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
This clinician has a currently effective opt-out record in the imported CMS file. Ask the practice about payment arrangements before booking.
- Effective Jan 1, 2016 through Jan 1, 2028
Source: Opt Out Affidavits : 2026-08-01 · Reporting period: 2026-08-01 to 2026-08-31 · Published Sep 21, 2026.
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
1120 19Th St Nw Ste 200Washington, DC 20036-3615
Education & affiliations
- Medical / professional school
- George Washington University School Of Medicine
- Graduation year
- 1973
- CMS specialties
- Endocrinology · Internal Medicine
Practice groups
Reported hospital affiliations
- Sibley Memorial Hospital Washington, DC
- Virginia Hospital Center Arlington, 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.
Service-mix comparison is unavailable for this NPI in the imported Medicare service file.
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
- Endocrinology · Internal Medicine (CMS)
- Taxonomy code
- 174400000X
- Enumeration date
- Oct 31, 2006
- Record updated
- Jul 8, 2007
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- M.D.
Reported taxonomies and licenses
174400000X · Primary
License reported: MD7663 DC
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
1120 19Th St Nw Ste 200Washington, DC 20036-3615
- Phone
- (202) 296-3443
- Fax
- (202) 296-8948
Mailing address
1120 19TH ST NW STE 200WASHINGTON, DC 200363615
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
Report a directory issue