WILLIAM WEI
NPI 1235827585
Anesthesiologist Assistant in Washington, DC
About William Wei NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM WEI (NPI 1235827585) is an individual anesthesiologist assistant in Washington, District Of Columbia, licensed in District Of Columbia (AA2000039) and active in the NPI registry since April 2023. He is a graduate of Other (2023).
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
William Wei 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 William Wei reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Washington, DC 20010
- Reassigned Medicare billing, District of Columbia enrollment
- 482 clinicians in this Medicare group
Washington, DC 20010
- Reassigned Medicare billing, District of Columbia enrollment
- 3,530 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 3
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 20010
WASHINGTON, DC 20010
WASHINGTON, DC 20010
WASHINGTON, DC 20010
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 William Wei's NPI number?
The NPI number for William Wei is 1235827585. It was assigned to this individual provider in the NPPES registry on April 25, 2023.
Where is William Wei located?
William Wei practices at 110 Irving St NW, Washington, DC 20010. The listed phone number is (202) 877-7783.
What is William Wei's specialty?
The primary specialty registered for this NPI is Anesthesiologist Assistant with taxonomy code 367H00000X.
Is William Wei enrolled in Medicare?
Yes. William Wei 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 William Wei's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Wei reassigns Medicare benefits to 2 organizations: Medstar Medical Group Anesthesiology LLC (Washington, DC) and Medstar Medical Group II 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 William Wei'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 William Wei was last updated on July 17, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# William Wei · NPI 1235827585
Anesthesiologist Assistant physician in Washington, District of Columbia. Individual provider, active in the CMS NPPES registry since April 25, 2023.
## Identity
- **NPI:** 1235827585 (Entity type: Individual)
- **Enumerated:** April 25, 2023
- **Primary specialty:** Anesthesiologist Assistant · taxonomy 367H00000X
- **State license:** AA2000039 (District of Columbia)
- **Sole proprietor:** No
## Practice location
- **Address:** 110 IRVING ST NW, Washington, DC 20010-3017
- **Phone:** (202) 877-7783
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Medstar Medical Group Anesthesiology LLC (NPI 1558976175, Washington, DC); Medstar Medical Group II LLC (NPI 1023836137, Washington, DC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2023
## Record status
- **NPPES last updated:** July 17, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1235827585) · Data from the CMS NPPES public registry.