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RACHEL SIM MD PA
NPI 1871902858
Internal Medicine in Plano, TX

Active since August 04, 2014CLIA 45D2153224 · Waiver
6309 PRESTON RD STE 1400, PLANO, TX 75024(469) 443-0719(469) 443-0569 Get Directions Write a Review

NPPES record last updated: October 2, 2018. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Rachel Sim Md Pa NPPES

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

RACHEL SIM MD PA (NPI 1871902858) is a healthcare organization registered as an internal medicine in Plano, Texas and active in the NPI registry since August 2014. The organization holds a CLIA Waiver certificate valid through August 22, 2028 and lists Meesun Rachel Sim, President, as its authorized official.

NPPES Registry Identity

NPI1871902858
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameRACHEL SIM MD PA
Location Address6309 PRESTON RD STE 1400Plano, TX 75024
Mailing Address6309 Preston Rd Ste 1400Plano, TX 75024-2740 · (469) 443-0719 · Fax (469) 443-0569
Phone(469) 443-0719
Fax(469) 443-0569
Organization SubpartNo
Authorized OfficialMeesun Rachel SimPresident · (617) 838-1089
Enumeration DateAugust 4, 2014
Last NPPES UpdateOctober 2, 2018
✔ NPI 1871902858 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in TX · N6026
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.
6309 PRESTON RD STE 1400, Plano, TX 75024
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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)

Rachel Sim Md Pa is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Rachel Sim MD PA, which bills Medicare for the services this clinician delivers.

Clinician (1)

Meesun Sim, M.D.
Internal Medicine
NPI 1205018926
6309 PRESTON RD STE 1400
Plano, TX 75024
(469) 443-0719
✔ PECOS✔ Accepts MedicareSame address

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 45D2153224

Rachel Sim, MD, PA · Plano, TX
Active · expires Aug 22, 2028
CLIA Number45D2153224
Laboratory TypePhysician Office
Certificate Effective DateAugust 23, 2026
Certificate Expiration DateAugust 22, 2028
Laboratory DirectorMeesun Rachel Sim
Laboratory Phone(469) 443-0719
Laboratory LocationRachel Sim, MD, PA6309 Preston Rd Ste #1400, Plano, TX 75024
CLIA data matches this NPI record on: 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 Rachel Sim MD PA's NPI number?

The NPI number for Rachel Sim MD PA is 1871902858. It was assigned to this organization in the NPPES registry on August 4, 2014.

Where is Rachel Sim MD PA located?

Rachel Sim MD PA is located at 6309 Preston Rd Ste 1400, Plano, TX 75024. The listed phone number is (469) 443-0719.

What is Rachel Sim MD PA's specialty?

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

Is Rachel Sim MD PA enrolled in Medicare?

Yes. Rachel Sim MD PA is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Rachel Sim MD PA?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Rachel Sim MD PA. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Rachel Sim MD PA hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 45D2153224) is associated with this NPI, valid through August 22, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Rachel Sim MD PA was last updated on October 2, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.