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Cecilia Thien Thu Si Nguyen, MD

Hospitalist Physician in Royal Oak, MI · enumerated 2018.

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

National Provider Identifier

1548753296

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Registry record

Entity type Individual (Type 1)
Name Cecilia Thien Thu Si Nguyen
Credential MD
Sex Female
Practice address 3601 W 13 Mile Rd, Royal Oak, MI, 48073
Phone (248) 691-8646
Enumeration date Jun 7, 2018
Last updated in NPPES Mar 14, 2023

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MT215927 (PA) Secondary
208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 4301504876 (MI) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Cecilia Nguyen?
Cecilia Nguyen is registered in NPPES with the primary taxonomy of Hospitalist Physician. 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-14.