MASON WADE RAU MD
NPI 1093274243
Internal Medicine in Gonzales, LA
About Mason Wade Rau Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MASON WADE RAU MD (NPI 1093274243) is an individual internal medicine provider in Gonzales, Louisiana, licensed in Louisiana (330991) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with Our Lady Of The Lake Regional Medical Center, and maintains a secondary practice location in Gonzales.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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 and accepts Medicare assignment
Mason Wade Rau Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Mason Rau 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 70810
- Reassigned Medicare billing, Louisiana enrollment
- 163 clinicians in this Medicare group
Baton Rouge, LA 70808
- Reassigned Medicare billing, Louisiana enrollment
- 873 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Our Lady Of The Lake Regional Medical Center
Acute Care Hospitals · Baton Rouge, LAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 70737 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 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GONZALES, LA 70737
GONZALES, LA 70737
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 Mason Rau's NPI number?
The NPI number for Mason Rau is 1093274243. It was assigned to this individual provider in the NPPES registry on March 18, 2019.
Where is Mason Rau located?
Mason Rau practices at 2647 S Saint Elizabeth Blvd Ste 219, Gonzales, LA 70737. The listed phone number is (225) 647-8511.
What is Mason Rau's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Mason Rau enrolled in Medicare?
Yes. Mason Rau is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Mason Rau's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mason Rau reassigns Medicare benefits to 2 organizations: Convenient Care LLC (Baton Rouge, LA) and Our Lady Of The Lake Physician Group LLC (Baton Rouge, 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 Mason Rau's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mason Rau accept?
Health plans from AmeriHealth Caritas Next, Blue Cross and Blue Shield of Louisiana, HMO Louisiana and UnitedHealthcare list Mason Rau 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.
Is Mason Rau affiliated with any hospitals?
According to CMS data, Mason Rau is affiliated with Our Lady Of The Lake Regional Medical Center.
When was this NPI record last updated?
The NPPES record for Mason Rau was last updated on March 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Mason Wade Rau, MD · NPI 1093274243
Internal Medicine physician in Gonzales, Louisiana. Individual provider, active in the CMS NPPES registry since March 18, 2019.
## Identity
- **NPI:** 1093274243 (Entity type: Individual)
- **Enumerated:** March 18, 2019
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 330991 (Louisiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 2647 S SAINT ELIZABETH BLVD STE 219, Gonzales, LA 70737-5020
- **Phone:** (225) 647-8511 · **Fax:** (225) 644-8358
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **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): Convenient Care LLC (NPI 1164422630, Baton Rouge, LA); Our Lady Of The Lake Physician Group LLC (NPI 1033494943, Baton Rouge, LA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Louisiana State University School Of Medicine In New Orleans, class of 2019
## Record status
- **NPPES last updated:** March 13, 2026
- **Other identifiers:** Medicaid 2494970 (LA)
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Source: [NPI Profile](https://npiprofile.com/npi/1093274243) · Data from the CMS NPPES public registry.