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Chesterfield Internal Medicine and Rheumatology, LLC

Internal Medicine Physician in Chesterfield, MO · enumerated 2006 · authorized official Darren Haskell, Chief Medical Officer.

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

National Provider Identifier

1659463941

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Registry record

Entity type Organization (Type 2)
Legal business name Chesterfield Internal Medicine and Rheumatology, LLC
Parent organization St. Lukes Medical Group
Practice address 226 S Woods Mill Rd Ste 43, Chesterfield, MO, 63017
Phone (314) 205-6444
Fax (314) 590-5924
Enumeration date Sep 28, 2006
Last updated in NPPES Mar 5, 2026

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary
207RR0500X Rheumatology Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Darren Haskell
Title Chief Medical Officer
Phone (314) 205-6444

Other identifiers

Identifier Type State Issuer
DD5556 Other MO MEDICARE RAILROAD

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

How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2026-03-05. Verify at npiregistry.cms.hhs.gov.
Where is Chesterfield Internal Medicine and Rheumatology, LLC located?
The practice location on file with NPPES is in Chesterfield, MO.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-05.