John Lewandowski, PSYD
Psychologist · Crystal Lake, IL
John Lewandowski, PSYD is a psychologist with a practice address in Crystal Lake, Illinois, and NPI 1104307917, issued on Aug 29, 2018. Check the license with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Lewandowski
- Credential
- PSYD
- Primary taxonomy
- Psychologist 103T00000X
- Practice location
- 350 E Congress Pkwy Ste C, Crystal Lake, IL 60014
- Phone
- (815) 356-5050
- Enumerated
- Aug 29, 2018
- Record last updated
- Aug 29, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (815) 356-5094
- Medicare enrollment
- Enrolled (PECOS I20221014002570); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest psychologist records → All 1,011 in Illinois → Look up another NPI →
Also registered at 350 E Congress Pkwy Ste C
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dana Marolt, MSWClinical Social Worker1679216428
Verify John Lewandowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Pra Behavioral LLCSchaumburg, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Lewandowski among 1,011 psychologist records in Illinois
John Lewandowski, PSYD 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 2018, is newer than 66% of them.
- NPI issued2018 · 66% of these records are older, 30% newer
- In a Medicare fileYes · 11% of these records are
- In the CMS Doctors and Clinicians fileYes · 20% of these records are
- Graduated2018 · median 2001 among the 201 with a school on file
- Record last updated2018 · 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 Crystal Lake → Psychologist nationwide →
The 8 psychologist records with the nearest ZIP codes
- Emily BaileyCrystal Lake, IL 600141013462415
- Catherine Dean, PSYDCrystal Lake, IL 600141356340616
- Ray Kim, PHDCrystal Lake, IL 600141912906116
- Katharina KlakusCrystal Lake, IL 600141093165995
- Edward McGarrigle, PSYDCrystal Lake, IL 600141841299013
- Terrence Neary, PHDCrystal Lake, IL 600141477552685
- Catherine Radosevich, PSYDCrystal Lake, IL 600141760073902
- Carolyn Reeder, PH.D.Crystal Lake, IL 600141023145349
Common questions
What is John Lewandowski, PSYD's NPI number?
John Lewandowski, PSYD's National Provider Identifier (NPI) is 1104307917, issued on Aug 29, 2018. An NPI identifies a provider in billing; it is not a license.
Where is John Lewandowski, PSYD located?
The NPPES record lists a practice address at 350 E Congress Pkwy Ste C, Crystal Lake, IL, 60014. Phone: (815) 356-5050. Providers update this record themselves, so call before visiting.
How can I verify John Lewandowski, PSYD's license?
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.
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.