LYDIA R MACKAY CCC-SLP
NPI 1346473311
Speech-Language Pathologist in Phoenix, AZ
About Lydia R Mackay Ccc-slp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LYDIA R MACKAY CCC-SLP (NPI 1346473311) is an individual speech-language pathologist provider in Phoenix, Arizona, licensed in Arizona (6265) and active in the NPI registry since August 2009. She maintains a secondary practice location in Gilbert.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Lydia R Mackay Ccc-slp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Lydia Mackay reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Gilbert, AZ 85296
- Reassigned Medicare billing, Arizona enrollment
- 25 clinicians in this Medicare group
Flagstaff, AZ 86011
- Reassigned Medicare billing, Arizona enrollment
- 17 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.
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 Lydia Mackay's NPI number?
The NPI number for Lydia Mackay is 1346473311. It was assigned to this individual provider in the NPPES registry on August 25, 2009. The provider is also known as Lydia Kearney.
Where is Lydia Mackay located?
Lydia Mackay practices at 10251 N 35th Ave, Phoenix, AZ 85051. The listed phone number is (602) 995-7366.
What is Lydia Mackay's specialty?
The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.
Is Lydia Mackay enrolled in Medicare?
Yes. Lydia Mackay is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Lydia Mackay's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lydia Mackay reassigns Medicare benefits to 2 organizations: Mentis Reo, LLC. (Gilbert, AZ) and Northern Arizona University (Flagstaff, AZ). 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 Lydia Mackay'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 Lydia Mackay was last updated on April 10, 2023. 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.
# Lydia R Mackay, CCC-SLP · NPI 1346473311
Speech-Language Pathologist provider in Phoenix, Arizona. Individual provider, active in the CMS NPPES registry since August 25, 2009.
## Identity
- **NPI:** 1346473311 (Entity type: Individual)
- **Enumerated:** August 25, 2009
- **Primary specialty:** Speech-Language Pathologist · taxonomy 235Z00000X
- **State license:** 6265 (Arizona)
- **Sole proprietor:** No
## Practice location
- **Address:** 10251 N 35TH AVE, Phoenix, AZ 85051-1305
- **Phone:** (602) 995-7366
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Mentis Reo, LLC. (NPI 1609541283, Gilbert, AZ); Northern Arizona University (NPI 1912950486, Flagstaff, AZ) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 10, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1346473311) · Data from the CMS NPPES public registry.