NPPES file of Aug 9, 2026

Leonard Nai-En Chen, M.D.

Blood Banking & Transfusion Medicine Physician · Bethesda, MD

Leonard Nai-En Chen, M.D. is a blood banking & transfusion medicine physician with a practice address in Bethesda, Maryland, and NPI 1548688336, issued on Mar 31, 2014. Check the license (Maryland D0084728, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.

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

NPPES recordNPPES file of Aug 9, 2026
1548688336
Name
Leonard Nai-En Chen
Credential
M.D.
Primary taxonomy
Blood Banking & Transfusion Medicine Physician 207ZB0001X
License numbers
D0084728 MD
D84728 MD
Self-reported in NPPES; status is on the state search
Practice location
9000 Rockville Pike Bldg 10, Bethesda, MD 20892
Phone
(301) 451-8186
Enumerated
Mar 31, 2014
Record last updated
Jul 22, 2024
Medicare enrollment
Enrolled (PECOS I20240924001257); accepts Medicare assignment
Medical or professional school
Georgetown University School Of Medicine, 2005
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest blood banking & transfusion medicine physician records → All 16 in Maryland → Look up another NPI →

Also registered at 9000 Rockville Pike Bldg 10

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

  1. Seher AnjumInternal Medicine Physician1932498953
  2. Eugena Baca, DNPClinical Nurse Specialist1356811475
  3. Kathleen Baxley, LICSWClinical Social Worker1003870411
  4. Jenna Bergerson, M.D.Allergy & Immunology Physician1851682249
  5. Anne Fejka, CRNPPediatric Nurse Practitioner1770022105
  6. Luis Franco, M.D.Clinical Genetics (M.D.) Physician1275762411

Verify Leonard Nai-En Chen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMaryland Board of Physicians
    Search for license D0084728    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
Open the Maryland 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.

Is this page about you? You can ask us to correct, restrict or remove it: how.

Bills Medicare through one group practice

  1. Medstar Medical Group II LLCWashington, DC

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Leonard Nai-En Chen among 16 blood banking & transfusion medicine physician records in Maryland

Leonard Nai-En Chen, M.D. is one of 16 blood banking & transfusion medicine physician records with a practice address in Maryland. 38% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 63% of them.

  • NPI issued2014 · 63% of these records are older, 25% newer
  • In a Medicare fileYes · 38% of these records are
  • In the CMS Doctors and Clinicians fileYes · 25% of these records are
  • Record last updated2024 · 63% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZB0001X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Blood Banking & Transfusion Medicine Physician providers in Maryland

There are 16 blood banking & transfusion medicine physician records in Maryland.

All 16 in Maryland → Every provider in Bethesda → Blood Banking & Transfusion Medicine Physician nationwide →

The 8 blood banking & transfusion medicine physician records with the nearest ZIP codes

  1. Harvey Alter, MDBethesda, MD 208921376847335
  2. Ion Chiosea, M.D.Bethesda, MD 208921811288947
  3. Kathleen Conry-Cantilena, M.D.Bethesda, MD 208921083041099
  4. Willy Flegel, MDBethesda, MD 208921093174369
  5. Roya Zarpak, MD, MSBethesda, MD 208921083242937
  6. James Long, M.D.Bethesda, MD 208891295147270
  7. Clayton Simon, MDBethesda, MD 208891740240407
  8. Anne Eder, M.D.Rockville, MD 208551477810448

Common questions

What is Leonard Nai-En Chen, M.D.'s NPI number?

Leonard Nai-En Chen, M.D.'s National Provider Identifier (NPI) is 1548688336, issued on Mar 31, 2014. An NPI identifies a provider in billing; it is not a license.

Where is Leonard Nai-En Chen, M.D. located?

The NPPES record lists a practice address at 9000 Rockville Pike Bldg 10, Bethesda, MD, 20892. Phone: (301) 451-8186. Providers update this record themselves, so call before visiting.

How can I verify Leonard Nai-En Chen, M.D.'s license?

NPPES lists Maryland license number D0084728, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.