MICHAEL E RAU M.D.
NPI 1467496216
Internal Medicine in Washington, MO
About Michael E Rau M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MICHAEL E RAU M.D. (NPI 1467496216) is an individual internal medicine provider in Washington, Missouri, licensed in Missouri (36513) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Mercy Hospital Washington, and is a graduate of University Of Missouri, Columbia School Of Medicine (1983).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 5
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
Michael E Rau M.d. 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 Reassignment
Medicare enrollment records show Michael Rau reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Wildwood, MO 63040
- Reassigned Medicare billing, Missouri enrollment
- 228 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 4
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.
Mercy Hospital Washington
Acute Care Hospitals · Washington, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63090 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WASHINGTON, MO 63090
WASHINGTON, MO 63090
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 Michael Rau's NPI number?
The NPI number for Michael Rau is 1467496216. It was assigned to this individual provider in the NPPES registry on June 15, 2006.
Where is Michael Rau located?
Michael Rau practices at 901 Patients First Dr, Washington, MO 63090. The listed phone number is (636) 239-7500.
What is Michael Rau's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Michael Rau enrolled in Medicare?
Yes. Michael 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 organization bills Medicare for Michael Rau's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Rau reassigns Medicare benefits to Mercy Clinic East Communities (Wildwood, MO). The 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 Michael Rau's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Michael Rau affiliated with any hospitals?
According to CMS data, Michael Rau is affiliated with Mercy Hospital Washington.
When was this NPI record last updated?
The NPPES record for Michael Rau was last updated on January 23, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Michael E Rau, M.D. · NPI 1467496216
Internal Medicine physician in Washington, Missouri. Individual provider, active in the CMS NPPES registry since June 15, 2006.
## Identity
- **NPI:** 1467496216 (Entity type: Individual)
- **Enumerated:** June 15, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 36513 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 901 PATIENTS FIRST DR, Washington, MO 63090-4700
- **Phone:** (636) 239-7500 · **Fax:** (636) 239-2836
## 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:** Mercy Clinic East Communities (NPI 1164857397, Wildwood, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Missouri, Columbia School Of Medicine, class of 1983
## Record status
- **NPPES last updated:** January 23, 2012
- **Other identifiers:** Medicare PIN 013012943; Other 110166324; Medicare UPIN A10324; and 2 more
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Source: [NPI Profile](https://npiprofile.com/npi/1467496216) · Data from the CMS NPPES public registry.