WASEEM AHMAD MD
NPI 1366520108
Internal Medicine - Nephrology in Vallejo, CA
About Waseem Ahmad Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WASEEM AHMAD MD (NPI 1366520108) is an individual nephrology provider in Vallejo, California, licensed in California (A73846) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1988).
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
Waseem Ahmad 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 Waseem Ahmad reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Vallejo, CA 94589
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Napa, CA 94558
- Reassigned Medicare billing, California enrollment
- 755 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
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 Waseem Ahmad's NPI number?
The NPI number for Waseem Ahmad is 1366520108. It was assigned to this individual provider in the NPPES registry on November 1, 2006.
Where is Waseem Ahmad located?
Waseem Ahmad practices at 975 Sereno Dr, Vallejo, CA 94589. The listed phone number is (707) 651-1000.
What is Waseem Ahmad's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is Waseem Ahmad enrolled in Medicare?
Yes. Waseem Ahmad 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 Waseem Ahmad's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Waseem Ahmad reassigns Medicare benefits to 2 organizations: Permanente Medical Group Inc (Vallejo, CA) and Department Of State Hospitals (Napa, 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 Waseem Ahmad'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 Waseem Ahmad was last updated on December 13, 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.
# Waseem Ahmad, MD · NPI 1366520108
Nephrology physician in Vallejo, California. Individual provider, active in the CMS NPPES registry since November 1, 2006.
## Identity
- **NPI:** 1366520108 (Entity type: Individual)
- **Enumerated:** November 1, 2006
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **State license:** A73846 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 975 SERENO DR, Vallejo, CA 94589-2441
- **Phone:** (707) 651-1000
## 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): Permanente Medical Group Inc (NPI 1336222397, Vallejo, CA); Department Of State Hospitals (NPI 1326098161, Napa, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1988
## Record status
- **NPPES last updated:** December 13, 2021
- **Other identifiers:** Medicaid 00A738460 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1366520108) · Data from the CMS NPPES public registry.