MS. ALLISON MARIE AST M.D.
NPI 1356640502
Pediatrics in Los Gatos, CA
About Ms. Allison Marie Ast M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. ALLISON MARIE AST M.D. (NPI 1356640502) is an individual pediatrics provider in Los Gatos, California, licensed in California (C181963) and active in the NPI registry since March 2011. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Locations 2
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 (PECOS)
Ms. Allison Marie Ast M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Allison Ast reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Palo Alto, CA 94301
- Reassigned Medicare billing, California enrollment
- 4,479 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 95032 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.
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 Allison Ast's NPI number?
The NPI number for Allison Ast is 1356640502. It was assigned to this individual provider in the NPPES registry on March 26, 2011.
Where is Allison Ast located?
Allison Ast practices at 15400 Los Gatos Blvd, Los Gatos, CA 95032. The listed phone number is (408) 730-6222.
What is Allison Ast's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Allison Ast enrolled in Medicare?
Yes. Allison Ast is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Allison Ast's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Allison Ast reassigns Medicare benefits to Sutter Bay Medical Foundation (Palo Alto, 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 Allison Ast'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 Allison Ast was last updated on November 3, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Ms. Allison Marie Ast, M.D. · NPI 1356640502
Pediatrics physician in Los Gatos, California. Individual provider, active in the CMS NPPES registry since March 26, 2011.
## Identity
- **NPI:** 1356640502 (Entity type: Individual)
- **Enumerated:** March 26, 2011
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** C181963 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 15400 LOS GATOS BLVD, Los Gatos, CA 95032-2502
- **Phone:** (408) 730-6222
## 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:** Sutter Bay Medical Foundation (NPI 1013950807, Palo Alto, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 3, 2022
- **Other identifiers:** Medicaid 2461117 (LA)
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Source: [NPI Profile](https://npiprofile.com/npi/1356640502) · Data from the CMS NPPES public registry.