Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. William Carl Harenburg Jr., M.D.
Pediatrics Physician in Wheaton, IL · enumerated 2008.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1891968954
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Registry record
Entity type Individual (Type 1)
Name Dr. William Carl Harenburg Jr.
Credential M.D.
Sex Male
Practice address 2001 N Gary Ave Ste 100, Wheaton, IL, 60187
Phone (630) 614-4100
Fax (630) 614-4148
Enumeration date Apr 10, 2008
Last updated in NPPES Oct 14, 2019
Taxonomy & licenses
208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 036.119728 (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
What is the NPI number for William Harenburg?
The National Provider Identifier (NPI) for William Harenburg is 1891968954, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Harenburg practice?
The practice location on file with NPPES is in Wheaton, IL. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-10-14.