DR. MARK WALTER LAYTON M.D.
NPI 1891846077
Internal Medicine - Rheumatology in Olympia, WA
About Dr. Mark Walter Layton M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK WALTER LAYTON M.D. (NPI 1891846077) is an individual rheumatology provider in Olympia, Washington, licensed in Washington (MD00024518) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, is affiliated with Willapa Harbor Hospital, and is a graduate of University Of Washington School Of Medicine (1982).
NPPES Registry Identity
Specialties & Licenses 3
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Mark Walter Layton M.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.
Areas of Expertise CMS Part B claims 2
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.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Willapa Harbor Hospital
Critical Access Hospitals · South Bend, WASummit Pacific Medical Center
Critical Access Hospitals · Elma, WAMason General Hospital & Family Of Clinics
Critical Access Hospitals · Shelton, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98502 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
OLYMPIA, WA 98502
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 Mark Layton's NPI number?
The NPI number for Mark Layton is 1891846077. It was assigned to this individual provider in the NPPES registry on January 15, 2007.
Where is Mark Layton located?
Mark Layton practices at 1212 Harrison Ave NW, Olympia, WA 98502. The listed phone number is (360) 754-6700.
What is Mark Layton's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Mark Layton enrolled in Medicare?
Yes. Mark Layton 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.
What insurance does Mark Layton accept?
Health plans from PacificSource Health Plans and Premera Blue Cross Blue Shield of Alaska list Mark Layton 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.
Is Mark Layton affiliated with any hospitals?
According to CMS data, Mark Layton is affiliated with Willapa Harbor Hospital, Summit Pacific Medical Center and Mason General Hospital & Family Of Clinics.
When was this NPI record last updated?
The NPPES record for Mark Layton was last updated on June 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 35 days 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.
