NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Joseph Rittinger Jr., D.O.

Anesthesiology Physician in Grand Blanc, MI · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1730234618

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. William Joseph Rittinger Jr.
Credential D.O.
Sex Male
Practice address 2432 Genesys Pkwy, Grand Blanc, MI, 48439
Phone (810) 606-6649
Enumeration date Jan 24, 2007
Last updated in NPPES Sep 26, 2007

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 220982 (MA) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for William Rittinger?
The National Provider Identifier (NPI) for William Rittinger is 1730234618, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Rittinger practice?
The practice location on file with NPPES is in Grand Blanc, MI. 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 2007-09-26.