John Joseph Clark, MD
Psychiatry Physician · Washington, DC
John Joseph Clark, MD is a psychiatry physician with a practice address in Washington, District of Columbia, and NPI 1538859269, issued on May 8, 2023. Check the license (District of Columbia MD600004346, as entered in NPPES) on the District of Columbia Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- John Joseph Clark
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- MD600004346 DC
Self-reported in NPPES; status is on the state search - Practice location
- 2120 L St NW Ste 600, Washington, DC 20037
- Phone
- (202) 741-2900
- Enumerated
- May 8, 2023
- Record last updated
- Jul 1, 2025
- Entity
- Type 1 · individual
Also registered at 2120 L St NW Ste 600
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Benedicto Borja, M.D.Psychiatry Physician1891716940
- Martin Clark, MDPsychiatry Physician1962143412
- Courtney Forbes, PHDClinical Psychologist1730969692
- Nina Govalla, MDPsychiatry Physician1366016404
- Stephanie Kielb, PHDPsychologist1023561313
- Yumin Kim, MDStudent in an Organized Health Care Education/Training Program1194576090
Verify John Joseph Clark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersDistrict of Columbia Board of Medicine
Search for license MD600004346Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average psychiatry physician in 2024
90 Medicare Part D claims for 19 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amitriptyline Hcl12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
467 psychiatry physician records list a practice address in Washington
They are 467 of the 45,857 NPPES records with a practice address in Washington, and 474 psychiatry physician records in District of Columbia.
All 467 in Washington → All 474 in District of Columbia → Every provider in Washington →
Other psychiatry physician records in District of Columbia
- Waseem Abdallah, M.D.Washington, DC1265961452
- Waliah Abdul-Razaq, MDWashington, DC1225617814
- Kathryn Abell, DOWashington, DC1063905339
- Kristen Abrams, M.D.Washington, DC1508077652
- Anam AhmedWashington, DC1386140143
- Jeffrey Akman, MDWashington, DC1811961691
- Joseph Alam, MD PSYCHIATRYWashington, DC1548441348
- Fatimah Albrekkan, M.D.Washington, DC1902254253
- Tanya Alim, MDWashington, DC1972601763
- Laurence Allen, MDWashington, DC1972728350
Common questions
What is John Joseph Clark, MD's NPI number?
John Joseph Clark, MD's National Provider Identifier (NPI) is 1538859269, issued on May 8, 2023. An NPI identifies a provider in billing; it is not a license.
Where is John Joseph Clark, MD located?
The NPPES record lists a practice address at 2120 L St NW Ste 600, Washington, DC, 20037. Phone: (202) 741-2900. Providers update this record themselves, so call before visiting.
How can I verify John Joseph Clark, MD's license?
NPPES lists District of Columbia license number MD600004346, as entered by the provider. Search the District of Columbia Board of Medicine at https://dchealth.dc.gov/bomed. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Joseph Clark, MD prescribe under Medicare Part D?
In 2024, John Joseph Clark, MD had 90 Medicare Part D claims for 19 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
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.