PATRICK HENNESSEY ERSTAD MD
NPI 1255034732
Internal Medicine in Seattle, WA
About Patrick Hennessey Erstad Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
PATRICK HENNESSEY ERSTAD MD (NPI 1255034732) is an individual internal medicine provider in Seattle, Washington, licensed in Washington (MD.MD.70070534) and active in the NPI registry since March 2023. He is enrolled in Medicare PECOS, is affiliated with Virginia Mason Medical Center, and is a graduate of University Of Washington School Of Medicine (2023).
NPPES Registry Identity
Specialties & Licenses
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
Patrick Hennessey Erstad Md 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 Patrick Erstad 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
- 1,021 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Virginia Mason Medical Center
Acute Care Hospitals · Seattle, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98101 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 20
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 Patrick Erstad's NPI number?
The NPI number for Patrick Erstad is 1255034732. It was assigned to this individual provider in the NPPES registry on March 23, 2023.
Where is Patrick Erstad located?
Patrick Erstad practices at 1100 9th Ave, Seattle, WA 98101. The listed phone number is (206) 583-2299.
What is Patrick Erstad's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Patrick Erstad enrolled in Medicare?
Yes. Patrick Erstad 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 Patrick Erstad's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Patrick Erstad reassigns Medicare benefits to Virginia Mason Medical Center (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 Patrick Erstad's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Patrick Erstad accept?
Health plans from Premera Blue Cross Blue Shield of Alaska list Patrick Erstad 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 Patrick Erstad affiliated with any hospitals?
According to CMS data, Patrick Erstad is affiliated with Virginia Mason Medical Center.
When was this NPI record last updated?
The NPPES record for Patrick Erstad was last updated on September 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 24 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.
# Patrick Hennessey Erstad, MD · NPI 1255034732
Internal Medicine physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since March 23, 2023.
## Identity
- **NPI:** 1255034732 (Entity type: Individual)
- **Enumerated:** March 23, 2023
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** MD.MD.70070534 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 1100 9TH AVE, Seattle, WA 98101-2756
- **Phone:** (206) 583-2299 · **Fax:** (206) 341-0065
## 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:** Virginia Mason Medical Center (NPI 1003970989, Seattle, WA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Washington School Of Medicine, class of 2023
## Record status
- **NPPES last updated:** September 28, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1255034732) · Data from the CMS NPPES public registry.