Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

Stephen Yim, MD, LLC

Q: What type of organization is Stephen Yim, MD, LLC?

Stephen Yim, MD, LLC is registered in NPPES as a Gynecologic Oncology Physician (its primary provider taxonomy).

Gynecologic Oncology Physician in Chesterfield, MO · enumerated 2007 · authorized official Rick Sonne, Director.

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

National Provider Identifier

1669515094

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Registry record

Entity type Organization (Type 2)

Legal business name Stephen Yim, MD, LLC

Parent organization St. Luke'S Medical Group

Practice address 226 S Woods Mill Rd, Ste 55w, Chesterfield, MO, 63017

Phone (314) 469-4440

Fax (314) 576-2346

Enumeration date Feb 15, 2007

Last updated in NPPES Feb 11, 2010

Taxonomy & classification

207VX0201X Gynecologic Oncology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Rick Sonne

Title Director

Phone (314) 576-2490

Other identifiers

Identifier	Type	State	Issuer
D01028	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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Stephen Yim, MD, LLC?

Stephen Yim, MD, LLC is registered in NPPES as a Gynecologic Oncology Physician (its primary provider taxonomy).

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-11.