KATHRYN LEIGH MOSSO MD
NPI 1215432174
Pediatrics in Sunnyvale, CA
About Kathryn Leigh Mosso Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KATHRYN LEIGH MOSSO MD (NPI 1215432174) is an individual pediatrics provider in Sunnyvale, California, licensed in California (A167362) and active in the NPI registry since March 2018. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Kathryn Leigh Mosso Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Kathryn Mosso reassigns Medicare billing to 2 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
Los Angeles, CA 90027
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Childrens Hospital Los Angeles Medical Group Inc
- 1,281 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 94086 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 Kathryn Mosso's NPI number?
The NPI number for Kathryn Mosso is 1215432174. It was assigned to this individual provider in the NPPES registry on March 23, 2018.
Where is Kathryn Mosso located?
Kathryn Mosso practices at 301 Old San Francisco Rd, Sunnyvale, CA 94086. The listed phone number is (408) 730-4250.
What is Kathryn Mosso's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Kathryn Mosso enrolled in Medicare?
Yes. Kathryn Mosso is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Kathryn Mosso's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kathryn Mosso reassigns Medicare benefits to 2 organizations: Sutter Bay Medical Foundation (Palo Alto, CA) and Children's Hospital Los Angeles Medical Group, Inc. (Los Angeles, 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 Kathryn Mosso'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 Kathryn Mosso was last updated on July 20, 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.
# Kathryn Leigh Mosso, MD · NPI 1215432174
Pediatrics physician in Sunnyvale, California. Individual provider, active in the CMS NPPES registry since March 23, 2018.
## Identity
- **NPI:** 1215432174 (Entity type: Individual)
- **Enumerated:** March 23, 2018
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** A167362 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 301 OLD SAN FRANCISCO RD, Sunnyvale, CA 94086-6386
- **Phone:** (408) 730-4250
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Sutter Bay Medical Foundation (NPI 1013950807, Palo Alto, CA); Children's Hospital Los Angeles Medical Group, Inc. (NPI 1265530653, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 20, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1215432174) · Data from the CMS NPPES public registry.