MARK WEI WENG D.O.
NPI 1477578425
Family Medicine in West Covina, CA
About Mark Wei Weng D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK WEI WENG D.O. (NPI 1477578425) is an individual family medicine provider in West Covina, California, licensed in California (20A8940) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Other (2003).
NPPES Registry Identity
Specialties & Licenses 2
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
Mark Wei Weng D.o. 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 Mark Weng reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Baldwin Park, CA 91706
- Reassigned Medicare billing, California enrollment
- 13,921 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 91790 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 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WEST COVINA, CA 91790
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 Mark Weng's NPI number?
The NPI number for Mark Weng is 1477578425. It was assigned to this individual provider in the NPPES registry on July 12, 2006.
Where is Mark Weng located?
Mark Weng practices at 1249 S Sunset Ave, West Covina, CA 91790. The listed phone number is (626) 813-2282.
What is Mark Weng's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Mark Weng enrolled in Medicare?
Yes. Mark Weng 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 Mark Weng's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Weng reassigns Medicare benefits to Southern California Permanente Medical Group (Baldwin Park, CA). 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 Mark Weng'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 Mark Weng was last updated on December 3, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Mark Wei Weng, D.O. · NPI 1477578425
Family Medicine physician in West Covina, California. Individual provider, active in the CMS NPPES registry since July 12, 2006.
## Identity
- **NPI:** 1477578425 (Entity type: Individual)
- **Enumerated:** July 12, 2006
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 20A8940 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1249 S SUNSET AVE, West Covina, CA 91790-3960
- **Phone:** (626) 813-2282 · **Fax:** (626) 813-2110
## 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:** Southern California Permanente Medical Group (NPI 1770515280, Baldwin Park, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2003
## Record status
- **NPPES last updated:** December 3, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1477578425) · Data from the CMS NPPES public registry.