NPPES file of Aug 9, 2026

Isabelle M. Lass, DDS

General Practice Dentistry · Washington, DC

Isabelle M. Lass, DDS is a general practice dentistry with a practice address in Washington, District of Columbia, and NPI 1801126131, issued on Jan 8, 2010. Check the license (District of Columbia DEN1000560, as entered in NPPES) with the District of Columbia board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1801126131
Name
Isabelle M. Lass
Credential
DDS
Primary taxonomy
General Practice Dentistry 1223G0001X
License number
DEN1000560 DC
Self-reported in NPPES; status is on the state search
Practice location
818 18TH St NW, Washington, DC 20006
Phone
(202) 659-9100
Enumerated
Jan 8, 2010
Record last updated
Jan 8, 2010 (not updated in 16 years: call before relying on the address or phone)
Fax
(202) 296-7746
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest general practice dentistry records → All 377 in District of Columbia → Look up another NPI →

Also registered at 818 18TH St NW

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Paul Cohen, D.D.S.Dentist1730388612
  2. Sara Cohen, DMDDentist1780883330
  3. Bridgette Hamilton Rhodes, DDSGeneral Practice Dentistry1508026345
  4. Jacqueline Harris Martin, DDSGeneral Practice Dentistry1376727206
  5. John Hunter, D.D.S.Dentist1194921338
  6. Kim Knoll, D.D.S., P.C.Dentist1457581878

Verify Isabelle M. Lass in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich District of Columbia board licenses this profession
    Search for license DEN1000560    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the District of Columbia license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Isabelle M. Lass among 377 general practice dentistry records in District of Columbia

Isabelle M. Lass, DDS is one of 377 general practice dentistry records with a practice address in District of Columbia. 50% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2010, is newer than 59% of them.

  • NPI issued2010 · 59% of these records are older, 39% newer
  • In a Medicare fileNo · 50% of these records are
  • In the CMS Doctors and Clinicians fileNo · 0% of these records are
  • Record last updated2010 · 74% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a District of Columbia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

365 general practice dentistry records list a practice address in Washington

They are 365 of the 45,857 NPPES records with a practice address in Washington, and 377 general practice dentistry records in District of Columbia. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 377 in District of Columbia → Every provider in Washington → General Practice Dentistry nationwide →

The 8 general practice dentistry records with the nearest ZIP codes

  1. Mahvassh Abreu, D.M.DWashington, DC 200061366467011
  2. Carlos Abreu, DMDWashington, DC 200061699796029
  3. Cesar Brignoni, DDSWashington, DC 200061245337575
  4. Daniel Cave, DMDWashington, DC 200061942319082
  5. Ali Fassihi, D.D.S.Washington, DC 200061215026752
  6. Jean Joh, DDSWashington, DC 200061740341254
  7. Fredrick Luzietti, D.D.S.Washington, DC 200061205938842
  8. Gustavo Mongelos, D.D.S.Washington, DC 200061649377839

Common questions

What is Isabelle M. Lass, DDS's NPI number?

Isabelle M. Lass, DDS's National Provider Identifier (NPI) is 1801126131, issued on Jan 8, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Isabelle M. Lass, DDS located?

The NPPES record lists a practice address at 818 18TH St NW, Washington, DC, 20006. Phone: (202) 659-9100. Providers update this record themselves, so call before visiting.

How can I verify Isabelle M. Lass, DDS's license?

NPPES lists District of Columbia license number DEN1000560, as entered by the provider. Search the District of Columbia board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.