KAREN W SIMPSON MD
NPI 1831264373
Pathology - Anatomic Pathology & Clinical Pathology in Opelousas, LA
About Karen W Simpson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAREN W SIMPSON MD (NPI 1831264373) is an individual anatomic pathology & clinical pathology provider in Opelousas, Louisiana, licensed in Louisiana (025694) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Karen W Simpson Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Karen Simpson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Baton Rouge, LA 70808
- Reassigned Medicare billing, Louisiana enrollment
- 29 clinicians in this Medicare group
Lake Charles, LA 70601
- Reassigned Medicare billing, Louisiana enrollment
- 16 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 70570 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
OPELOUSAS, LA 70570
OPELOUSAS, LA 70570
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 Karen Simpson's NPI number?
The NPI number for Karen Simpson is 1831264373. It was assigned to this individual provider in the NPPES registry on November 21, 2006.
Where is Karen Simpson located?
Karen Simpson practices at 1268 Attakapas Dr Suite 102, Opelousas, LA 70570. The listed phone number is (337) 948-8663.
What is Karen Simpson's specialty?
The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.
Is Karen Simpson enrolled in Medicare?
Yes. Karen Simpson is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Karen Simpson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Simpson reassigns Medicare benefits to 2 organizations: Pathology Group Of Louisiana, A Professional Medical Corporation (Baton Rouge, LA) and The Pathology Laboratory, Inc. (Lake Charles, LA). Each 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 Karen Simpson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Karen Simpson accept?
Health plans from HMO Louisiana list Karen Simpson 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 Karen Simpson was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 24 days 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.
# Karen W Simpson, MD · NPI 1831264373
Anatomic Pathology & Clinical Pathology physician in Opelousas, Louisiana. Individual provider, active in the CMS NPPES registry since November 21, 2006.
## Identity
- **NPI:** 1831264373 (Entity type: Individual)
- **Enumerated:** November 21, 2006
- **Primary specialty:** Pathology - Anatomic Pathology & Clinical Pathology · taxonomy 207ZP0102X
- **State license:** 025694 (Louisiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 1268 ATTAKAPAS DR, SUITE 102, Opelousas, LA 70570-6515
- **Phone:** (337) 948-8663 · **Fax:** (337) 948-8783
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Pathology Group Of Louisiana, A Professional Medical Corporation (NPI 1093843450, Baton Rouge, LA); The Pathology Laboratory, Inc. (NPI 1215917588, Lake Charles, LA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 29, 2026
- **Other identifiers:** Medicaid 1041947 (LA)
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Source: [NPI Profile](https://npiprofile.com/npi/1831264373) · Data from the CMS NPPES public registry.