DR. MARY DIANNE PLUMMER LOUDON PHD
NPI 1821318171
Counselor - Mental Health in Seattle, WA
About Dr. Mary Dianne Plummer Loudon Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARY DIANNE PLUMMER LOUDON PHD (NPI 1821318171) is an individual mental health provider in Seattle, Washington, licensed in Washington (PY60063635) and active in the NPI registry since June 2010. She has opted out of Medicare through July 16, 2027.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Opted out of Medicare
Dr. Mary Dianne Plummer Loudon Phd has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from July 16, 2025 through July 16, 2027.
Other Providers at the Same Location NPPES
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 Mary Loudon's NPI number?
The NPI number for Mary Loudon is 1821318171. It was assigned to this individual provider in the NPPES registry on June 9, 2010. The provider is also known as Dr. Mary Dianne Plummer.
Where is Mary Loudon located?
Mary Loudon practices at 1700 Westlake Ave. N. Suite 400, Seattle, WA 98109. The listed phone number is (206) 769-2052.
What is Mary Loudon's specialty?
The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.
Is Mary Loudon enrolled in Medicare?
No. Mary Loudon has opted out of Medicare through July 16, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.
When was this NPI record last updated?
The NPPES record for Mary Loudon was last updated on August 24, 2021. 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.
