DR. DAVID OWEN WALLS M.D.
NPI 1821478645
Transplant Surgery in Washington, DC
About Dr. David Owen Walls M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DAVID OWEN WALLS M.D. (NPI 1821478645) is an individual transplant surgery provider in Washington, District Of Columbia, licensed in District Of Columbia (MD210002445) and active in the NPI registry since June 2015. He is enrolled in Medicare PECOS and is a graduate of Rutgers New Jersey Medical School (2019).
NPPES Registry Identity
Specialties & Licenses
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
Dr. David Owen Walls 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 Reassignments
2Medicare enrollment records show David Walls reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Washington, DC 20007
- Reassigned Medicare billing, District of Columbia enrollment
- 3,530 clinicians in this Medicare group
Washington, DC 20007
- Reassigned Medicare billing, District of Columbia enrollment
- 861 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 5
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.
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, DC 20007
WASHINGTON, DC 20007
WASHINGTON, DC 20007
WASHINGTON, DC 20007
WASHINGTON, DC 20007
WASHINGTON, DC 20007
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 David Walls's NPI number?
The NPI number for David Walls is 1821478645. It was assigned to this individual provider in the NPPES registry on June 6, 2015.
Where is David Walls located?
David Walls practices at 3800 Reservoir Rd NW, Washington, DC 20007. The listed phone number is (202) 444-2000.
What is David Walls's specialty?
The primary specialty registered for this NPI is Transplant Surgery with taxonomy code 204F00000X.
Is David Walls enrolled in Medicare?
Yes. David Walls 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 David Walls's services?
According to the CMS Revalidation Reassignment List (October 2026 release), David Walls reassigns Medicare benefits to 2 organizations: Medstar Medical Group II LLC (Washington, DC) and Mgmc LLC (Washington, DC). 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 David Walls's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for David Walls was last updated on June 10, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Dr. David Owen Walls, M.D. · NPI 1821478645
Transplant Surgery physician in Washington, District of Columbia. Individual provider, active in the CMS NPPES registry since June 6, 2015.
## Identity
- **NPI:** 1821478645 (Entity type: Individual)
- **Enumerated:** June 6, 2015
- **Primary specialty:** Transplant Surgery · taxonomy 204F00000X
- **State license:** MD210002445 (District of Columbia)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 3800 RESERVOIR RD NW, Washington, DC 20007-2113
- **Phone:** (202) 444-2000
## 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): Medstar Medical Group II LLC (NPI 1205562816, Washington, DC); Mgmc LLC (NPI 1316949654, Washington, DC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rutgers New Jersey Medical School, class of 2019
## Record status
- **NPPES last updated:** June 10, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1821478645) · Data from the CMS NPPES public registry.