NPPES file of Aug 9, 2026

Joseph Gryzbek, PSY.D.

Psychologist · Naperville, IL

Joseph Gryzbek, PSY.D. is a psychologist with a practice address in Naperville, Illinois, and NPI 1538513213, issued on Apr 19, 2016. Check the license (Illinois 071.009076, as entered in NPPES) with the Illinois 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
1538513213
Name
Joseph Gryzbek
Credential
PSY.D.
Primary taxonomy
Psychologist 103T00000X
License number
071.009076 IL
Self-reported in NPPES; status is on the state search
Practice location
1979 N Mill St Ste 204, Naperville, IL 60563
Phone
(630) 474-1171
Enumerated
Apr 19, 2016
Record last updated
Aug 31, 2023
Fax
(833) 218-8811
Medicare enrollment
Enrolled (PECOS I20160818000370); 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.
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8 nearest psychologist records → All 1,011 in Illinois → Look up another NPI →

Also registered at 1979 N Mill St Ste 204

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

  1. Valeria GassBehavior Analyst1003423393
  2. Ellice KangPsychologist1679309850
  3. Timothy Paquette, PH.D.Clinical Psychologist1861246852
  4. Danielle Snedden, PSY.D.Psychologist1982195475

Verify Joseph Gryzbek in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 071.009076    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 Illinois 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. Gryzbek Therapy Services LLCNaperville, IL

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

Joseph Gryzbek among 1,011 psychologist records in Illinois

Joseph Gryzbek, PSY.D. is one of 1,011 psychologist records with a practice address in Illinois. 11% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 60% of them.

  • NPI issued2016 · 60% of these records are older, 37% newer
  • In a Medicare fileYes · 11% of these records are
  • In the CMS Doctors and Clinicians fileYes · 20% of these records are
  • Graduated2013 · median 2001 among the 201 with a school on file
  • Record last updated2023 · 62% 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 Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Psychologist providers in Illinois

There are 1,011 psychologist records in Illinois.

All 1,011 in Illinois → Every provider in Naperville → Psychologist nationwide →

The 8 psychologist records with the nearest ZIP codes

  1. James Hommowun, PSYDNaperville, IL 605631063167526
  2. Ellice KangNaperville, IL 605631679309850
  3. Cynthia Keene, PSY.D.Naperville, IL 605631386774651
  4. Tao LiuNaperville, IL 605631154557510
  5. Erica Long, PSYDNaperville, IL 605631508786385
  6. Paul Mullen, PSY. D.Naperville, IL 605631588743231
  7. Thomas NielsenNaperville, IL 605631558090340
  8. Shivani PatelNaperville, IL 605631366172629

Common questions

What is Joseph Gryzbek, PSY.D.'s NPI number?

Joseph Gryzbek, PSY.D.'s National Provider Identifier (NPI) is 1538513213, issued on Apr 19, 2016. An NPI identifies a provider in billing; it is not a license.

Where is Joseph Gryzbek, PSY.D. located?

The NPPES record lists a practice address at 1979 N Mill St Ste 204, Naperville, IL, 60563. Phone: (630) 474-1171. Providers update this record themselves, so call before visiting.

How can I verify Joseph Gryzbek, PSY.D.'s license?

NPPES lists Illinois license number 071.009076, as entered by the provider. Search the Illinois 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.