ALEXANDER LEE WERNE MD
NPI 1669903126
Pediatrics in Mountain View, CA
About Alexander Lee Werne Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALEXANDER LEE WERNE MD (NPI 1669903126) is an individual pediatrics provider in Mountain View, California, licensed in California (A160064) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Alexander Lee Werne Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
6Medicare enrollment records show Alexander Werne reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Palo Alto, CA 94301
- Reassigned Medicare billing, California enrollment
- 4,479 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 637 clinicians in this Medicare group
Oakland, CA 94609
- Reassigned Medicare billing, California enrollment
- 118 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 1,159 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 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 94040 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.
MOUNTAIN VIEW, CA 94040
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 Alexander Werne's NPI number?
The NPI number for Alexander Werne is 1669903126. It was assigned to this individual provider in the NPPES registry on March 24, 2017.
Where is Alexander Werne located?
Alexander Werne practices at 701 E El Camino Real, Mountain View, CA 94040. The listed phone number is (650) 934-7850.
What is Alexander Werne's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Alexander Werne enrolled in Medicare?
Yes. Alexander Werne is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Alexander Werne's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Werne reassigns Medicare benefits to 6 organizations: Sutter Bay Medical Foundation (Palo Alto, CA), University Of California Sfgh Medical Group (San Francisco, CA), Ucsf Health Medical Foundation (Oakland, CA), Ucsf Pediatrics Associates (San Francisco, CA), University Of California San Francisco (San Francisco, CA) and 1 more organization, listed in the Medicare section above. 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 Alexander Werne'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 Alexander Werne was last updated on June 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months 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.
# Alexander Lee Werne, MD · NPI 1669903126
Pediatrics physician in Mountain View, California. Individual provider, active in the CMS NPPES registry since March 24, 2017.
## Identity
- **NPI:** 1669903126 (Entity type: Individual)
- **Enumerated:** March 24, 2017
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** A160064 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 701 E EL CAMINO REAL, Mountain View, CA 94040-2833
- **Phone:** (650) 934-7850
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): Sutter Bay Medical Foundation (NPI 1013950807, Palo Alto, CA); University Of California Sfgh Medical Group (NPI 1265407381, San Francisco, CA); Ucsf Health Medical Foundation (NPI 1922124866, Oakland, CA); Ucsf Pediatrics Associates (NPI 1376614016, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 6, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1669903126) · Data from the CMS NPPES public registry.