LEIGH ANN MAST O.D.
NPI 1689939456
Optometrist in Federal Way, WA
About Leigh Ann Mast O.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LEIGH ANN MAST O.D. (NPI 1689939456) is an individual optometrist in Federal Way, Washington, licensed in Washington (60301603) and active in the NPI registry since July 2012. She is enrolled in Medicare PECOS and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Leigh Ann Mast O.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Leigh Mast reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Federal Way, WA 98023
- Reassigned Medicare billing, Washington enrollment
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98023 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 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FEDERAL WAY, WA 98023
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 Leigh Mast's NPI number?
The NPI number for Leigh Mast is 1689939456. It was assigned to this individual provider in the NPPES registry on July 9, 2012. The provider is also known as Leigh Ann Millbourn.
Where is Leigh Mast located?
Leigh Mast practices at 2317 SW 320th St Suite A, Federal Way, WA 98023. The listed phone number is (253) 952-5547.
What is Leigh Mast's specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is Leigh Mast enrolled in Medicare?
Yes. Leigh Mast is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Leigh Mast's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Leigh Mast reassigns Medicare benefits to Leigh Mast, Od, PLLC (Federal Way, WA). 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 Leigh Mast's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Leigh Mast accept?
Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Leigh Mast as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Leigh Mast was last updated on November 19, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Leigh Ann Mast, O.D. · NPI 1689939456
Optometrist provider in Federal Way, Washington. Individual provider, active in the CMS NPPES registry since July 9, 2012.
## Identity
- **NPI:** 1689939456 (Entity type: Individual)
- **Enumerated:** July 9, 2012
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **State license:** 60301603 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 2317 SW 320TH ST, SUITE A, Federal Way, WA 98023-2567
- **Phone:** (253) 952-5547
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** Leigh Mast, Od, PLLC (NPI 1124425111, Federal Way, WA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2012
## Record status
- **NPPES last updated:** November 19, 2014
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Source: [NPI Profile](https://npiprofile.com/npi/1689939456) · Data from the CMS NPPES public registry.