Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Gregory Jasinski, MD
Psychiatry Physician in Chicago, IL · enumerated 2010.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1164735403
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Registry record
Entity type Individual (Type 1)
Name Gregory Jasinski
Credential MD
Sex Male
Practice address 6650 N Northwest Hwy Ste 215, Chicago, IL, 60631
Phone (630) 216-9098
Fax (630) 447-0008
Enumeration date Jul 15, 2010
Last updated in NPPES Aug 20, 2025
Taxonomy & licenses
2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 036.139823 (IL) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is NPI 1164735403 active?
Yes, as of the latest NPPES snapshot, NPI 1164735403 is active (record last updated 2025-08-20).
How do I verify Gregory Jasinski's NPI record?
Cross-check NPI 1164735403 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-20.