Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Matthew Ryan Greenberg, D.C.
Chiropractor in Oak Brook, IL · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1003927914
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Registry record
Entity type Individual (Type 1)
Name Dr. Matthew Ryan Greenberg
Credential D.C.
Sex Male
Practice address 1100 Jorie Blvd Ste 318, Oak Brook, IL, 60523
Phone (630) 828-2271
Enumeration date Aug 31, 2006
Last updated in NPPES Nov 12, 2019
Taxonomy & licenses
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders.
About the DC 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
What specialty is Matthew Greenberg?
Matthew Greenberg is registered in NPPES with the primary taxonomy of Chiropractor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-11-12.