Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. LES PERKOWSKI D.O.
NPI 1710955604
Psychiatry & Neurology - Psychiatry in Dixon, IL

Q: What is Les Perkowski's NPI number?

The NPI number for Les Perkowski is 1710955604. It was assigned to this individual provider in the NPPES registry on March 8, 2006.

Q: What is Les Perkowski's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Q: When was this NPI record last updated?

The NPPES record for Les Perkowski was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 35 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since March 08, 2006

403 E 1ST ST, DIXON, IL 61021(815) 285-5635(815) 285-5851 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

On this page

About Dr. Les Perkowski D.o. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. LES PERKOWSKI D.O. (NPI 1710955604) is an individual psychiatry provider in Dixon, Illinois and active in the NPI registry since March 2006.

NPPES Registry Identity

NPI1710955604

Entity TypeIndividualMale

Primary Taxonomy2084P0800X

Provider Legal NameDR. LES PERKOWSKICredential: D.O.

Location Address403 E 1ST STDixon, IL 61021-3116

Mailing Address403 E 1st StDixon, IL 61021-3116 · (815) 285-5635 · Fax (815) 285-5851

Phone(815) 285-5635

Fax(815) 285-5851

Sole ProprietorNo

Enumeration DateMarch 8, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1710955604 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

403 E 1ST ST, Dixon, IL 61021

Open in Google Maps ↗

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SAAD BLANEY M.D.

Pathology (Anatomic Pathology & Clinical Pathology)

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 285-5533

KATHERINE SHAW BETHEA HOSPITAL

Psychiatric Unit

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 288-5531

BRETT AUSTIN MCGOWAN M.D.

Obstetrics & Gynecology

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 285-5461

MARIE NOWAK MD

Emergency Medicine

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 288-5531

STACEY PENAFLOR

Physical Therapist

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 285-5591

DOROTHY BENNETT MD

Internal Medicine

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 285-5629

VALARIE PFOUTZ APN

Nurse Practitioner (Family)

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 288-5531

AUDRA DANIELLE WASHO APN

Nurse Practitioner (Family)

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 284-5710

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Les Perkowski's NPI number?

The NPI number for Les Perkowski is 1710955604. It was assigned to this individual provider in the NPPES registry on March 8, 2006.

Where is Les Perkowski located?

Les Perkowski practices at 403 E 1st St, Dixon, IL 61021. The listed phone number is (815) 285-5635.

What is Les Perkowski's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

When was this NPI record last updated?

The NPPES record for Les Perkowski was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 35 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.