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DR. GREGORY STEPHEN KACZENSKI M.D.
NPI 1073661310
Clinical Neuropsychologist in Little Rock, AR

Active since January 05, 2007PECOS EnrolledAccepts Medicare Assignment
801 SCOTT ST, LITTLE ROCK, AR 72201(501) 221-7238(501) 221-7239 Get Directions Write a Review

NPPES record last updated: March 31, 2008. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Gregory Stephen Kaczenski M.d. NPPES

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

DR. GREGORY STEPHEN KACZENSKI M.D. (NPI 1073661310) is an individual clinical neuropsychologist in Little Rock, Arkansas, licensed in Arkansas (C-5000) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS and is a graduate of University Of Arkansas College Of Medicine (1976).

NPPES Registry Identity

NPI1073661310
Entity TypeIndividualMale
Primary Taxonomy103G00000X
Provider Legal NameDR. GREGORY STEPHEN KACZENSKICredential: M.D.
Location Address801 SCOTT STLittle Rock, AR 72201-4613
Mailing Address1433 Kavanaugh BlvdLittle Rock, AR 72205-4323 · (501) 221-7238 · Fax (501) 221-7239
Phone(501) 221-7238
Fax(501) 221-7239
Sole ProprietorYes
Medical School CMSUniversity Of Arkansas College Of MedicineGraduated 1976
Enumeration DateJanuary 5, 2007
Last NPPES UpdateMarch 31, 2008
✔ NPI 1073661310 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinical NeuropsychologistBehavioral Health & Social Service Providers
Taxonomy Code103G00000X
License✔ Licensed in AR · C-5000
Definition
A clinical psychologist who applies principles of assessment and intervention based upon the scientific study of human behavior as it relates to normal and abnormal functioning of the central nervous system. The specialty is dedicated to enhancing the understanding of brain-behavior relationships and the application of such knowledge to human problems.
801 SCOTT ST, Little Rock, AR 72201
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Other Identifiers 3

Medicaid104751001AR
Medicare PIN52787AR
Medicare UPINB90337AR

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Gregory Stephen Kaczenski M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4587704507
PECOS Enrollment IDI20190222000991
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Gregory Kaczenski reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Department Of State Hospitals
1,344 mi
Psychiatric Hospital
3102 E HIGHLAND AVE
Patton, CA 92369
  • Reassigned Medicare billing, California enrollment
  • 755 clinicians in this Medicare group
NPI 1043249204 (909) 425-7552

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 3

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

PSYCHIATRIC INSTITUTE OF ARKANSAS PLC
Specialist
801 SCOTT ST
LITTLE ROCK, AR 72201
Pulaski County (501) 221-7238
NETWORK OF WELLNESS, LLC
Community/Behavioral Health
801 SCOTT ST
LITTLE ROCK, AR 72201
Pulaski County (501) 221-7238
NIMMO PSYCHIATRIC SERVICES, INC.
Psychiatry & Neurology (Psychiatry)
801 SCOTT ST
LITTLE ROCK, AR 72201
Pulaski County (501) 221-7238

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 Gregory Kaczenski's NPI number?

The NPI number for Gregory Kaczenski is 1073661310. It was assigned to this individual provider in the NPPES registry on January 5, 2007.

Where is Gregory Kaczenski located?

Gregory Kaczenski practices at 801 Scott St, Little Rock, AR 72201. The listed phone number is (501) 221-7238.

What is Gregory Kaczenski's specialty?

The primary specialty registered for this NPI is Clinical Neuropsychologist with taxonomy code 103G00000X.

Is Gregory Kaczenski enrolled in Medicare?

Yes. Gregory Kaczenski is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Gregory Kaczenski's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Kaczenski reassigns Medicare benefits to Department Of State Hospitals (Patton, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gregory Kaczenski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Gregory Kaczenski was last updated on March 31, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years 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.