NPPES file of Aug 9, 2026

Steven K. Diehl, PHD

Psychologist · Middletown, RI

Steven K. Diehl, PHD is a psychologist with a practice address in Middletown, Rhode Island, and NPI 1215988175, issued on May 15, 2006. Check the license (Rhode Island PS00851, as entered in NPPES) with the Rhode Island board that licenses this profession; 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
1215988175
Name
Steven K. Diehl
Credential
PHD
Primary taxonomy
Psychologist 103T00000X
License number
PS00851 RI
Self-reported in NPPES; status is on the state search
Practice location
850 Aquidneck Ave, Middletown, RI 02842
Phone
(401) 440-7927
Enumerated
May 15, 2006
Record last updated
Jul 22, 2008 (not updated in 18 years: call before relying on the address or phone)
Fax
(401) 842-0360
Medicaid ID
SD32151 RI
Medicare enrollment
Enrolled (PECOS I20051201000461); accepts Medicare assignment
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 psychologist records → All 244 in Rhode Island → Look up another NPI →

Also registered at 850 Aquidneck Ave

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

  1. Megan BeldenRegistered Dietitian1881462653
  2. Paul Block, PH.D.Psychologist1295797389
  3. Seth Bock, D.A.Acupuncturist1508918053
  4. Nancy Davis, PH.D.Psychologist1881657195
  5. James Dobbin, M.D.Otolaryngology Physician1164426011
  6. Steven Freedman, M.D.Otolaryngology Physician1912901869

Verify Steven K. Diehl in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Rhode Island board licenses this profession
    Search for license PS00851    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 Rhode Island 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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Bills Medicare through one group practice

  1. Northwest Community Health CarePascoag, RI

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

Steven K. Diehl among 244 psychologist records in Rhode Island

Steven K. Diehl, PHD is one of 244 psychologist records with a practice address in Rhode Island. 9% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than under 1% of them.

  • NPI issued2006 · under 1% of these records are older, 67% newer
  • In a Medicare fileYes · 9% of these records are
  • In the CMS Doctors and Clinicians fileYes · 18% of these records are
  • Graduated2002 · median 1992 among the 43 with a school on file
  • Record last updated2008 · 65% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103T00000X and a Rhode Island practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Psychologist providers in Rhode Island

There are 244 psychologist records in Rhode Island.

All 244 in Rhode Island → Every provider in Middletown → Psychologist nationwide →

The 8 psychologist records with the nearest ZIP codes

  1. Paul Block, PH.D.Middletown, RI 028421295797389
  2. Nancy Davis, PH.D.Middletown, RI 028421881657195
  3. Jon Ladd, PHDMiddletown, RI 028421619923414
  4. Martha Williams, PH.D.Middletown, RI 028421841253150
  5. Kristin MahanNewport, RI 028401891203709
  6. Ann Zartler, PH. D.Jamestown, RI 028351508822057
  7. Armenio Costa, PH.D.Hopkinton, RI 028321184670580
  8. Shauna Finley, PH.D.North Kingstown, RI 028521790180198

Common questions

What is Steven K. Diehl, PHD's NPI number?

Steven K. Diehl, PHD's National Provider Identifier (NPI) is 1215988175, issued on May 15, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Steven K. Diehl, PHD located?

The NPPES record lists a practice address at 850 Aquidneck Ave, Middletown, RI, 02842. Phone: (401) 440-7927. Providers update this record themselves, so call before visiting.

How can I verify Steven K. Diehl, PHD's license?

NPPES lists Rhode Island license number PS00851, as entered by the provider. Search the Rhode Island 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. 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.