MARSHALL A CORSON
NPI 1548346349
Internal Medicine - Interventional Cardiology in Seattle, WA
About Marshall A Corson NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARSHALL A CORSON (NPI 1548346349) is an individual interventional cardiology provider in Seattle, Washington, licensed in Washington (MD00031838) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of Baylor College Of Medicine (1981).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 4
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
Marshall A Corson 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 Marshall Corson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Seattle, WA 98101
- Reassigned Medicare billing, Washington enrollment
- Also billed through NPI 1992823595 (Washington)
- 142 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98104 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SEATTLE, WA 98104
SEATTLE, WA 98104
SEATTLE, WA 98104
SEATTLE, WA 98104
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 Marshall Corson's NPI number?
The NPI number for Marshall Corson is 1548346349. It was assigned to this individual provider in the NPPES registry on October 27, 2006.
Where is Marshall Corson located?
Marshall Corson practices at Harborview Medical Center 325 9th Ave, Seattle, WA 98104. The listed phone number is (206) 731-3475.
What is Marshall Corson's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Interventional Cardiology, with taxonomy code 207RI0011X.
Is Marshall Corson enrolled in Medicare?
Yes. Marshall Corson 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 Marshall Corson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marshall Corson reassigns Medicare benefits to Whidbey Island Public Hospital District (Seattle, 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 Marshall Corson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Marshall Corson accept?
Health plans from Premera Blue Cross Blue Shield of Alaska list Marshall Corson 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 Marshall Corson was last updated on April 27, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Marshall A Corson · NPI 1548346349
Interventional Cardiology physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since October 27, 2006.
## Identity
- **NPI:** 1548346349 (Entity type: Individual)
- **Enumerated:** October 27, 2006
- **Primary specialty:** Internal Medicine - Interventional Cardiology · taxonomy 207RI0011X
- **State license:** MD00031838 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** HARBORVIEW MEDICAL CENTER, 325 9TH AVE, Seattle, WA 98104-9747
- **Phone:** (206) 731-3475
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Whidbey Island Public Hospital District (NPI 1609497858, Seattle, WA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Baylor College Of Medicine, class of 1981
## Record status
- **NPPES last updated:** April 27, 2011
- **Other identifiers:** Medicare UPIN F83132; Other 3403; Medicare ID-Type Unspecified 108083; and 1 more
---
Source: [NPI Profile](https://npiprofile.com/npi/1548346349) · Data from the CMS NPPES public registry.