NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Arthur Oscar Sieron, M.D.

Emergency Medicine Physician in Saginaw, MI · enumerated 2023.

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

National Provider Identifier

1477230555

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Arthur Oscar Sieron
Credential M.D.
Sex Male
Practice address 1000 Houghton Avenue, Saginaw, MI, 48602
Phone (989) 746-7500
Enumeration date Jun 30, 2023
Last updated in NPPES Mar 24, 2026

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 4351051111 (MI) Primary
207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 036178159 (IL) Secondary
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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Arthur Sieron practice?
The practice location on file with NPPES is in Saginaw, MI. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Arthur Sieron?
The National Provider Identifier (NPI) for Arthur Sieron is 1477230555, 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 2026-03-24.