MELISSA LAM VANDER WAL M.D.
NPI 1154692804
Internal Medicine in Vallejo, CA
About Melissa Lam Vander Wal M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MELISSA LAM VANDER WAL M.D. (NPI 1154692804) is an individual internal medicine provider in Vallejo, California, licensed in California (113343) and active in the NPI registry since January 2012. She is enrolled in Medicare PECOS and is a graduate of University Of Southern California Keck School Of Medicine (2010).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
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
Melissa Lam Vander Wal 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 Melissa Vander Wal reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Vallejo, CA 94589
- Reassigned Medicare billing, California enrollment
- 20,078 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 94589 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
VALLEJO, CA 94589
VALLEJO, CA 94589
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 Melissa Vander Wal's NPI number?
The NPI number for Melissa Vander Wal is 1154692804. It was assigned to this individual provider in the NPPES registry on January 25, 2012. The provider is also known as Melissa Yeelin Lam M.D..
Where is Melissa Vander Wal located?
Melissa Vander Wal practices at 975 Sereno Dr, Vallejo, CA 94589. The listed phone number is (707) 651-2440.
What is Melissa Vander Wal's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Melissa Vander Wal enrolled in Medicare?
Yes. Melissa Vander Wal 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 Melissa Vander Wal's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Melissa Vander Wal reassigns Medicare benefits to Permanente Medical Group Inc (Vallejo, 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 Melissa Vander Wal'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 Melissa Vander Wal was last updated on January 10, 2022. 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.
# Melissa Lam Vander Wal, M.D. · NPI 1154692804
Internal Medicine physician in Vallejo, California. Individual provider, active in the CMS NPPES registry since January 25, 2012.
## Identity
- **NPI:** 1154692804 (Entity type: Individual)
- **Enumerated:** January 25, 2012
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 113343 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 975 SERENO DR, Vallejo, CA 94589-2441
- **Phone:** (707) 651-2440 · **Fax:** (707) 651-1261
## 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:** Permanente Medical Group Inc (NPI 1336222397, Vallejo, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Southern California Keck School Of Medicine, class of 2010
## Record status
- **NPPES last updated:** January 10, 2022
- **Other identifiers:** Other 113343 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1154692804) · Data from the CMS NPPES public registry.