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WEST COUNTY INTERNAL MEDICINE LLC
NPI 1225658040
Internal Medicine in Chesterfield, MO

Active since April 22, 2020CLIA 26D2222134 · Waiver
16216 BAXTER RD STE 320, CHESTERFIELD, MO 63017(636) 391-1706(636) 391-1201 Get Directions Write a Review

NPPES record last updated: April 22, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About West County Internal Medicine Llc NPPES

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

WEST COUNTY INTERNAL MEDICINE LLC (NPI 1225658040) is a healthcare organization registered as an internal medicine in Chesterfield, Missouri and active in the NPI registry since April 2020. The organization holds a CLIA Waiver certificate valid through April 26, 2027 and lists Patricia Pawlikowski, Owner, as its authorized official.

NPPES Registry Identity

NPI1225658040
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameWEST COUNTY INTERNAL MEDICINE LLC
Location Address16216 BAXTER RD STE 320Chesterfield, MO 63017-4778
Mailing Address16216 Baxter Rd Ste 320Chesterfield, MO 63017-4778 · (636) 391-1706 · Fax (636) 391-1201
Phone(636) 391-1706
Fax(636) 391-1201
Organization SubpartNo
Authorized OfficialPatricia PawlikowskiOwner · (636) 391-1706
Enumeration DateApril 22, 2020
NPPES CertifiedApril 22, 2020
✔ NPI 1225658040 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ 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.
16216 BAXTER RD STE 320, Chesterfield, MO 63017
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

West County Internal Medicine Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to West County Internal Medicine LLC, which bills Medicare for the services they deliver. Of these, 2 practice within 10 miles. They are listed nearest first.

Clinicians, nearest first (2)

Roque Ramos, M.D.
Vascular Surgery
NPI 1609815240
14897 CLAYTON RD STE 100
Chesterfield, MO 63017
(636) 391-1706
✔ PECOS✔ Accepts Medicare2.3 mi
Maria Pawlikowski, M.D.
Internal Medicine
NPI 1861658619
14897 CLAYTON RD STE 100
Chesterfield, MO 63017
(636) 391-1706
✔ PECOS✔ Accepts Medicare2.3 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 26D2222134

West County Internal Medicine · Chesterfield, MO
Active · expires Apr 26, 2027
CLIA Number26D2222134
Laboratory TypePhysician Office
Certificate Effective DateApril 27, 2025
Certificate Expiration DateApril 26, 2027
Laboratory DirectorMaria P. Pawlikowski
Laboratory Phone(636) 391-1706
Laboratory LocationWest County Internal Medicine16216 Baxter Rd Suite 320, Chesterfield, MO 63017
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

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 West County Internal Medicine LLC's NPI number?

The NPI number for West County Internal Medicine LLC is 1225658040. It was assigned to this organization in the NPPES registry on April 22, 2020.

Where is West County Internal Medicine LLC located?

West County Internal Medicine LLC is located at 16216 Baxter Rd Ste 320, Chesterfield, MO 63017. The listed phone number is (636) 391-1706.

What is West County Internal Medicine LLC's specialty?

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

Is West County Internal Medicine LLC enrolled in Medicare?

Yes. West County Internal Medicine LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through West County Internal Medicine LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to West County Internal Medicine LLC, in Internal Medicine and Vascular Surgery. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Of these, 2 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does West County Internal Medicine LLC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 26D2222134) is associated with this NPI, valid through April 26, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for West County Internal Medicine LLC was last updated on April 22, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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.