NPPES file of Aug 9, 2026

Thomas J. Kleyn, PHARM.D.

Pharmacotherapy Pharmacist · Pomona, CA

Thomas J. Kleyn, PHARM.D. is a pharmacotherapy pharmacist with a practice address in Pomona, California, and NPI 1790196855, issued on May 12, 2014. Check the license (California 67340, as entered in NPPES) with the California 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
1790196855
Name
Thomas J. Kleyn
Credential
PHARM.D.
Primary taxonomy
Pharmacotherapy Pharmacist 1835P1200X
License numbers
67340 CA
26023576A IN
Self-reported in NPPES; status is on the state search
Practice location
309 E 2ND St, Pomona, CA 91766
Phone
(909) 469-8638
Enumerated
May 12, 2014
Record last updated
May 12, 2014 (not updated in 12 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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8 nearest pharmacotherapy pharmacist records → All 605 in California → Look up another NPI →

Also registered at 309 E 2ND St

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

  1. Andre AabediStudent in an Organized Health Care Education/Training Program1891582102
  2. Natalie Aabodi, DMDStudent in an Organized Health Care Education/Training Program1851085187
  3. Shahrzad Aarup, DDSGeneral Practice Dentistry1265784367
  4. Manas AavulaStudent in an Organized Health Care Education/Training Program1972496644
  5. Alexander AbdouStudent in an Organized Health Care Education/Training Program1023865904
  6. Dawoud AbdulmalekStudent in an Organized Health Care Education/Training Program1407786882

Verify Thomas J. Kleyn in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 67340    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 California license search

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Thomas J. Kleyn among 605 pharmacotherapy pharmacist records in California

Thomas J. Kleyn, PHARM.D. is one of 605 pharmacotherapy pharmacist records with a practice address in California. 10% 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 2014, is newer than 68% of them.

  • NPI issued2014 · 68% of these records are older, 27% newer
  • In a Medicare fileNo · 10% of these records are
  • In the CMS Doctors and Clinicians fileNo · 0% of these records are
  • Record last updated2014 · 76% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1835P1200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pharmacotherapy Pharmacist providers in California

There are 605 pharmacotherapy pharmacist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 605 in California → Every provider in Pomona → Pharmacotherapy Pharmacist nationwide →

The 8 pharmacotherapy pharmacist records with the nearest ZIP codes

  1. Roger Klotz, R.PH., BCNSP, FASCPPomona, CA 917661801898069
  2. Jacqueline VoPomona, CA 917671871037820
  3. Hoang-Trung PhamRosemead, CA 917701477981322
  4. Devangi Shah, PHARM.D., BCPSOntario, CA 917611710342928
  5. Eric Gupta, PHARM.D.San Gabriel, CA 917761114924776
  6. Chris Lim, PHARMD, BCPSSan Gabriel, CA 917761245157700
  7. Michelle Do, PHARMDUpland, CA 917861972270734
  8. Ashish Trivedi, PHARM.D.Walnut, CA 917891225375264

Common questions

What is Thomas J. Kleyn, PHARM.D.'s NPI number?

Thomas J. Kleyn, PHARM.D.'s National Provider Identifier (NPI) is 1790196855, issued on May 12, 2014. An NPI identifies a provider in billing; it is not a license.

Where is Thomas J. Kleyn, PHARM.D. located?

The NPPES record lists a practice address at 309 E 2ND St, Pomona, CA, 91766. Phone: (909) 469-8638. Providers update this record themselves, so call before visiting.

How can I verify Thomas J. Kleyn, PHARM.D.'s license?

NPPES lists California license number 67340, as entered by the provider. Search the California 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.