Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark Weiss, MD
Pediatrics Physician in Lombard, IL · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1154382117
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Registry record
Entity type Individual (Type 1)
Name Mark Weiss
Credential MD
Sex Male
Practice address 500 E 22nd St, Ste D, Lombard, IL, 60148
Phone (630) 620-6322
Enumeration date Mar 30, 2006
Last updated in NPPES Jan 27, 2011
Taxonomy & licenses
208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 036061299 (IL) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 036061299 | Medicaid | IL | - |
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
Where does Mark Weiss practice?
The practice location on file with NPPES is in Lombard, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Weiss?
The National Provider Identifier (NPI) for Mark Weiss is 1154382117, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-01-27.