WHITNEY MAH
NPI 1023629979
Speech-Language Pathologist in Fontana, CA
About Whitney Mah NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WHITNEY MAH (NPI 1023629979) is an individual speech-language pathologist provider in Fontana, California and active in the NPI registry since August 2020.
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)
Whitney Mah is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Whitney Mah reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Anaheim, CA 92807
- Reassigned Medicare billing, California enrollment
- 13,921 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.
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.
FONTANA, CA 92335
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 Whitney Mah's NPI number?
The NPI number for Whitney Mah is 1023629979. It was assigned to this individual provider in the NPPES registry on August 13, 2020.
Where is Whitney Mah located?
Whitney Mah practices at 9961 Sierra Ave, Fontana, CA 92335. The listed phone number is (909) 427-5000.
What is Whitney Mah's specialty?
The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.
Is Whitney Mah enrolled in Medicare?
Yes. Whitney Mah is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Whitney Mah's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Whitney Mah reassigns Medicare benefits to Southern California Permanente Medical Group (Anaheim, 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 Whitney Mah'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 Whitney Mah was last updated on July 25, 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.
# Whitney Mah · NPI 1023629979
Speech-Language Pathologist provider in Fontana, California. Individual provider, active in the CMS NPPES registry since August 13, 2020.
## Identity
- **NPI:** 1023629979 (Entity type: Individual)
- **Enumerated:** August 13, 2020
- **Primary specialty:** Speech-Language Pathologist · taxonomy 235Z00000X
- **Sole proprietor:** No
## Practice location
- **Address:** 9961 SIERRA AVE, Fontana, CA 92335-6720
- **Phone:** (909) 427-5000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Bills Medicare through:** Southern California Permanente Medical Group (NPI 1952333460, Anaheim, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 25, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1023629979) · Data from the CMS NPPES public registry.