NPPES file of Aug 9, 2026

James L. Mastrich, ED.D.

Addiction (Substance Use Disorder) Counselor · Kingston, NJ

James L. Mastrich, ED.D. is an addiction (substance use disorder) counselor with a practice address in Kingston, New Jersey, and NPI 1649392671, issued on Apr 3, 2007. Check the license (New Jersey 35SI00223800, as entered in NPPES) with the New Jersey 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
1649392671
Name
James L. Mastrich
Credential
ED.D.
Primary taxonomy
Addiction (Substance Use Disorder) Counselor 101YA0400X
License number
35SI00223800 NJ
Self-reported in NPPES; status is on the state search
Practice location
4475 Route 27, Kingston, NJ 08528
Phone
(609) 921-3665
Enumerated
Apr 3, 2007
Record last updated
Sep 11, 2025
Fax
(609) 397-1971
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 4475 Route 27

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

  1. Jessica Flint, LCSWClinical Social Worker1336209543
  2. Ellyn Geller, ED.D.Counseling Psychologist1326364662
  3. Steven Hoffman, L.ACAcupuncturist1033407911
  4. Carol Horowitz, LCSWClinical Social Worker1750401592
  5. Clifford Koblin, LPC, LCADCProfessional Counselor1396868071
  6. Julia Little, L.S.W.Social Worker1558757328

Verify James L. Mastrich in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich New Jersey board licenses this profession
    Search for license 35SI00223800    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 New Jersey license search

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1 addiction (substance use disorder) counselor records list a practice address in Kingston

They are 1 of the 22 NPPES records with a practice address in Kingston, and 1,226 addiction (substance use disorder) counselor records in New Jersey. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,226 in New Jersey → Every provider in Kingston →

Other addiction (substance use disorder) counselor records in New Jersey

  1. Louis Abbatiello, CADCRio Grande, NJ1093469603
  2. Angela Abbott, MS, LAC, LCADC, CCTPBrick, NJ1336076744
  3. Ameen Abdullah, MS,CADCTrenton, NJ1891116646
  4. El-Shabazz Abdullah, MSWTrenton, NJ1376909200
  5. Rasool Abdullah, LCADCNewark, NJ1235589953
  6. George Aber, MSToms River, NJ1467737296
  7. Sondas AbidPaterson, NJ1508539156
  8. Ana Ackermann-Blanco, MA, LCADC, CSW, CCSParsippany, NJ1518667989
  9. Maya AcostaLong Valley, NJ1316658719
  10. Maurice AdamsNewark, NJ1952063000

Common questions

What is James L. Mastrich, ED.D.'s NPI number?

James L. Mastrich, ED.D.'s National Provider Identifier (NPI) is 1649392671, issued on Apr 3, 2007. An NPI identifies a provider in billing; it is not a license.

Where is James L. Mastrich, ED.D. located?

The NPPES record lists a practice address at 4475 Route 27, Kingston, NJ, 08528. Phone: (609) 921-3665. Providers update this record themselves, so call before visiting.

How can I verify James L. Mastrich, ED.D.'s license?

NPPES lists New Jersey license number 35SI00223800, as entered by the provider. Search the New Jersey 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.