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CHESTERFIELD INTERNAL MEDICINE AND RHEUMATOLOGY, LLC
NPI 1659463941
Internal Medicine in Chesterfield, MO

Active since September 28, 2006CLIA 26D0940905 · Waiver
226 S WOODS MILL RD STE 43, CHESTERFIELD, MO 63017(314) 205-6444(314) 590-5924 Get Directions Write a Review

NPPES record last updated: March 5, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Mar 5, 2026, Dec 12, 2025, Dec 4, 2020 (3 updates tracked since 2020).

About Chesterfield Internal Medicine And Rheumatology, Llc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CHESTERFIELD INTERNAL MEDICINE AND RHEUMATOLOGY, LLC (NPI 1659463941) is a healthcare organization registered as an internal medicine in Chesterfield, Missouri and active in the NPI registry since September 2006. The organization holds a CLIA Waiver certificate valid through February 17, 2028 and lists Darren Haskell, Chief Medical Officer, as its authorized official.

NPPES Registry Identity

NPI1659463941
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameCHESTERFIELD INTERNAL MEDICINE AND RHEUMATOLOGY, LLC
Location Address226 S WOODS MILL RD STE 43Chesterfield, MO 63017-3663
Mailing Address232 S Woods Mill RdChesterfield, MO 63017-3406 · (636) 685-7804
Phone(314) 205-6444
Fax(314) 590-5924
Organization SubpartYesParent: St. Lukes Medical Group
Authorized OfficialDarren HaskellChief Medical Officer · (314) 205-6444
Enumeration DateSeptember 28, 2006
Last NPPES UpdateMarch 5, 20263 updates tracked since enumeration
NPPES CertifiedMarch 5, 2026
✔ NPI 1659463941 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedInternal Medicine · RheumatologyTaxonomy 207RR0500X
226 S WOODS MILL RD STE 43, Chesterfield, MO 63017
Open in Google Maps ↗

Other Identifiers 1

OtherDD5556MO · Medicare Railroad

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 26D0940905

Chesterfield Internal Medicine And Rheumatology · Chesterfield, MO
Active · expires Feb 17, 2028
CLIA Number26D0940905
Laboratory TypePhysician Office
Certificate Effective DateFebruary 18, 2026
Certificate Expiration DateFebruary 17, 2028
Laboratory DirectorJames H. Esther
Laboratory Phone(314) 205-0300
Laboratory LocationChesterfield Internal Medicine And Rheumatology226 South Woods Mill Road Ste 43 W, Chesterfield, MO 63017
CLIA data matches this NPI record on: Address Name
This certificate is issued to a laboratory to perform only waived tests.

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. FAYE C. COHEN M.D.
Internal Medicine (Rheumatology)
226 S WOODS MILL RD STE 43
CHESTERFIELD, MO 63017
St. Louis County (314) 205-6444
DR. JAMES H. ESTHER M.D.
Internal Medicine (Rheumatology)
226 S WOODS MILL RD STE 43
CHESTERFIELD, MO 63017
St. Louis County (314) 205-6444

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Chesterfield Internal Medicine And Rheumatology, LLC's NPI number?

The NPI number for Chesterfield Internal Medicine And Rheumatology, LLC is 1659463941. It was assigned to this organization in the NPPES registry on September 28, 2006.

Where is Chesterfield Internal Medicine And Rheumatology, LLC located?

Chesterfield Internal Medicine And Rheumatology, LLC is located at 226 S Woods Mill Rd Ste 43, Chesterfield, MO 63017. The listed phone number is (314) 205-6444.

What is Chesterfield Internal Medicine And Rheumatology, LLC's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Does Chesterfield Internal Medicine And Rheumatology, LLC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 26D0940905) is associated with this NPI, valid through February 17, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does Chesterfield Internal Medicine And Rheumatology, LLC accept?

Health plans from Anthem Blue Cross and Blue Shield list Chesterfield Internal Medicine And Rheumatology, LLC as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Chesterfield Internal Medicine And Rheumatology, LLC was last updated on March 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.