MEI Y CHOW-KWAN MD
NPI 1689619330
Internal Medicine in Walnut Creek, CA
About Mei Y Chow-kwan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MEI Y CHOW-KWAN MD (NPI 1689619330) is an individual internal medicine provider in Walnut Creek, California, licensed in California (A50662) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1986).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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
Mei Y Chow-kwan 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 Mei Chow-kwan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Walnut Creek, CA 94597
- Reassigned Medicare billing, California enrollment
- 650 clinicians in this Medicare group
Oakland, CA 94606
- Reassigned Medicare billing, California enrollment
- 130 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 2
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94598 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 11
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 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Mei Chow-kwan's NPI number?
The NPI number for Mei Chow-kwan is 1689619330. It was assigned to this individual provider in the NPPES registry on June 17, 2006.
Where is Mei Chow-kwan located?
Mei Chow-kwan practices at 2621 Shadelands Drive, Walnut Creek, CA 94598. The listed phone number is (925) 947-0417.
What is Mei Chow-kwan's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Mei Chow-kwan enrolled in Medicare?
Yes. Mei Chow-kwan 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 Mei Chow-kwan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mei Chow-kwan reassigns Medicare benefits to 2 organizations: John Muir Physician Network (Walnut Creek, CA) and Asian Health Services (Oakland, CA). 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 Mei Chow-kwan'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 Mei Chow-kwan was last updated on June 18, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Mei Y Chow-Kwan, MD · NPI 1689619330
Internal Medicine physician in Walnut Creek, California. Individual provider, active in the CMS NPPES registry since June 17, 2006.
## Identity
- **NPI:** 1689619330 (Entity type: Individual)
- **Enumerated:** June 17, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A50662 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2621 SHADELANDS DRIVE, Walnut Creek, CA 94598
- **Phone:** (925) 947-0417
## 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): John Muir Physician Network (NPI 1841407665, Walnut Creek, CA); Asian Health Services (NPI 1003134545, Oakland, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1986
## Record status
- **NPPES last updated:** June 18, 2015
- **Other identifiers:** Medicare UPIN 795151 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1689619330) · Data from the CMS NPPES public registry.