Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Stephen C Yim, MD

Gynecology Physician in Chesterfield, MO · enumerated 2006.

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

National Provider Identifier

1043221047

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Registry record

Entity type Individual (Type 1)

Name Dr. Stephen C Yim

Credential MD

Sex Male

Practice address 226 S Woods Mill Rd, Suite 55 West, Chesterfield, MO, 63017

Phone (314) 469-4440

Fax (314) 576-2346

Enumeration date Aug 11, 2006

Last updated in NPPES Mar 12, 2010

Taxonomy & licenses

207VG0400X Gynecology Physician Allopathic & Osteopathic Physicians · License R3N53 (MO) Primary

207VX0201X Gynecologic Oncology Physician Allopathic & Osteopathic Physicians · License R3N53 (MO) Secondary

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
160046009	Other	MO	RR MEDICARE
P00657134	Other	MO	RR MEDICARE

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.

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Frequently asked questions

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.

What specialty is Stephen Yim?

Stephen Yim is registered in NPPES with the primary taxonomy of Gynecology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-03-12.