NPPES file of Aug 9, 2026

John Michael Della Porta, PSYD

Clinical Psychologist · Washington, DC

John Michael Della Porta, PSYD is a clinical psychologist with a practice address in Washington, District of Columbia, and NPI 1508484007, issued on Jul 10, 2020. Check the license (District of Columbia PSY1001481, 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
1508484007
Name
John Michael Della Porta
Credential
PSYD
Primary taxonomy
Clinical Psychologist 103TC0700X
License number
PSY1001481 DC
Self-reported in NPPES; status is on the state search
Practice location
1729 21St St NW, Washington, DC 20009
Phone
(202) 234-0903
Enumerated
Jul 10, 2020
Record last updated
Jul 10, 2020 (not updated in 6 years: call before relying on the address or phone)
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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Also registered at 1729 21St St NW

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

  1. Arielle Bernstein, PSYDClinical Psychologist1437780459
  2. Lillian De Petrillo, PHDClinical Psychologist1962755157
  3. John Dennis, PH.D.Clinical Psychologist1033400247
  4. Gareth Harrison, PSYDCognitive & Behavioral Psychologist1760253892
  5. Hyejin Jin, PHDClinical Psychologist1710645593
  6. Jeffrey Mann, PSYDClinical Psychologist1780837278

Verify John Michael Della Porta 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 PSY1001481
    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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558 clinical psychologist records list a practice address in Washington

They are 558 of the 45,857 NPPES records with a practice address in Washington, and 564 clinical psychologist records in District of Columbia. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

Other clinical psychologist records in District of Columbia

  1. Chiara Abbatelli, PSYDWashington, DC1366124398
  2. Liliana Acosta, PHDWashington, DC1588446165
  3. Alyssa Adams, PSY.D.Washington, DC1861740854
  4. Robert AdamskiWashington, DC1427861699
  5. Alexander Afram, PHDWashington, DC1942703533
  6. Sarah AfromowitzWashington, DC1720577695
  7. Vaune Ainsworth, PH.D.Washington, DC1316187933
  8. Folasade Akinkuotu, PHDWashington, DC1770158313
  9. Ashley Alderette, PSY.D.Washington, DC1639697550
  10. Abir Aldhalimi, PHDWashington, DC1952793671

Common questions

What is John Michael Della Porta, PSYD's NPI number?

John Michael Della Porta, PSYD's National Provider Identifier (NPI) is 1508484007, issued on Jul 10, 2020. An NPI identifies a provider in billing; it is not a license.

Where is John Michael Della Porta, PSYD located?

The NPPES record lists a practice address at 1729 21St St NW, Washington, DC, 20009. Phone: (202) 234-0903. Providers update this record themselves, so call before visiting.

How can I verify John Michael Della Porta, PSYD's license?

NPPES lists District of Columbia license number PSY1001481, 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.

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.