ABIGAIL FESSLER
NPI 1316406101
Internal Medicine - Infectious Disease in Seattle, WA
About Abigail Fessler NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ABIGAIL FESSLER (NPI 1316406101) is an individual infectious disease provider in Seattle, Washington, licensed in Washington (MD61568038) and active in the NPI registry since March 2019. She is enrolled in Medicare PECOS, is affiliated with University Of Washington Medical Ctr, and is a graduate of Perelman School Of Med At The University Of Pennsylvania (2019).
NPPES Registry Identity
Specialties & Licenses 2
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
Abigail Fessler 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 Reassignments
2Medicare enrollment records show Abigail Fessler reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- 94 clinicians in this Medicare group
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- 4,364 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.
University Of Washington Medical Ctr
Acute Care Hospitals · Seattle, WAPhysician 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.
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 Abigail Fessler's NPI number?
The NPI number for Abigail Fessler is 1316406101. It was assigned to this individual provider in the NPPES registry on March 19, 2019.
Where is Abigail Fessler located?
Abigail Fessler practices at 325 9th Ave, Seattle, WA 98104. The listed phone number is (206) 520-5000.
What is Abigail Fessler's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Abigail Fessler enrolled in Medicare?
Yes. Abigail Fessler 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 organizations bill Medicare for Abigail Fessler's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Abigail Fessler reassigns Medicare benefits to 2 organizations: King County Finance (Seattle, WA) and The Association Of University Physicians (Seattle, WA). Each 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 Abigail Fessler's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Abigail Fessler accept?
Health plans from Ambetter Health, Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Abigail Fessler 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 Abigail Fessler affiliated with any hospitals?
According to CMS data, Abigail Fessler is affiliated with University Of Washington Medical Ctr.
When was this NPI record last updated?
The NPPES record for Abigail Fessler was last updated on June 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months 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.
# Abigail Fessler · NPI 1316406101
Infectious Disease physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since March 19, 2019.
## Identity
- **NPI:** 1316406101 (Entity type: Individual)
- **Enumerated:** March 19, 2019
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** MD61568038 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 325 9TH AVE, Seattle, WA 98104-2420
- **Phone:** (206) 520-5000
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): King County Finance (NPI 1306903604, Seattle, WA); The Association Of University Physicians (NPI 1023041159, Seattle, WA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Perelman School Of Med At The University Of Pennsylvania, class of 2019
## Record status
- **NPPES last updated:** June 6, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1316406101) · Data from the CMS NPPES public registry.