Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. WILLIAM CARL MARSON DC
NPI 1922149574
Chiropractor - Orthopedic in Redmond, WA

Active since February 08, 2007
7508 159TH PL NE APT 324, REDMOND, WA 98052(425) 591-2350 Get Directions Write a Review

NPPES record last updated: September 23, 2026. Verified against the NPPES registry weekly; last sync: October 11, 2026.

Record update history: Sep 23, 2026, Mar 30, 2026, Feb 27, 2019 (3 updates tracked since 2019).

About Dr. William Carl Marson Dc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM CARL MARSON DC (NPI 1922149574) is an individual orthopedic provider in Redmond, Washington, licensed in Washington (CH00003099) and active in the NPI registry since February 2007.

NPPES Registry Identity

NPI1922149574
Entity TypeIndividualMale
Primary Taxonomy111NX0800X
Provider Legal NameDR. WILLIAM CARL MARSONCredential: DC
Location Address7508 159TH PL NE APT 324Redmond, WA 98052-6164
Mailing Address7508 159th Pl Ne Apt 324Redmond, WA 98052-6164 · (425) 592-2350
Sole ProprietorNo
Enumeration DateFebruary 8, 2007
Last NPPES UpdateSeptember 23, 20263 updates tracked since enumeration
NPPES CertifiedSeptember 23, 2026
✔ NPI 1922149574 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyChiropractor · OrthopedicChiropractic Providers
Taxonomy Code111NX0800X
License✔ Licensed in WA · CH00003099
Definition
Chiropractic Orthopedics/Neuromusculoskeletal Medicine is defined as that branch of chiropractic medicine that includes the continued acquisition of knowledge relative to both normal functions and diseases of the human body as they relate to the bones, joints, capsules, discs, muscles, ligaments, tendons, their complete neurological and vascular components, referred organ systems and contiguous tissues. This also includes the development and perfection of skills relative to health maintenance when such exists and when not, the investigations, historical review, physical detection, correlative diagnosis development and complete management of any disorder within the bounds defined herein. Also necessary is the delivery of the combined knowledge and skill on a primary basis to patients who both need and desire this service to the eventual outcome of remissions, whenever resolution is not readily achievable. In addition the certified chiropractic orthopedist/neuromusculoskeletal medicine specialist provides consultation services at the request of other qualified doctors seeking assistance in the care of their patients. The chiropractic orthopedist/neuromusculoskeletal medicine specialist may also engage in the teaching and or research of subjects and materials relevant to pursuing the quest for knowledge in the ever changing field of the orthopedic specialty.
7508 159TH PL NE APT 324, Redmond, WA 98052

Accepted Insurance

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 William Marson's NPI number?

The NPI number for William Marson is 1922149574. It was assigned to this individual provider in the NPPES registry on February 8, 2007.

Where is William Marson located?

William Marson practices at 7508 159th Pl NE Apt 324, Redmond, WA 98052. The listed phone number is (425) 591-2350.

What is William Marson's specialty?

The primary specialty registered for this NPI is Chiropractor, specializing in Orthopedic, with taxonomy code 111NX0800X.

What insurance does William Marson accept?

Health plans from PacificSource Health Plans list William Marson 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 William Marson was last updated on September 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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.