DR. TIMOTHY LEONOR TAN D.O.
NPI 1205272507
Pathology - Dermatopathology in Seattle, WA
About Dr. Timothy Leonor Tan D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TIMOTHY LEONOR TAN D.O. (NPI 1205272507) is an individual dermatopathology provider in Seattle, Washington, licensed in Washington (70062322) and active in the NPI registry since May 2013. He is enrolled in Medicare PECOS, maintains 4 additional practice locations, and is a graduate of Midwestern University, Chicago College Of Osteopathic Med (2013).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 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
Dr. Timothy Leonor Tan D.o. 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
14Medicare enrollment records show Timothy Tan reassigns Medicare billing to 14 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Beaverton, OR 97008
- Reassigned Medicare billing, Michigan and Oregon enrollments
- 13 clinicians in this Medicare group
Algonquin, IL 60102
- Reassigned Medicare billing, Illinois enrollment
- 11 clinicians in this Medicare group
Hoffman Estates, IL 60169
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Bakal Dermatology Associates Sc
- 7 clinicians in this Medicare group
Libertyville, IL 60048
- Reassigned Medicare billing, Illinois enrollment
- 12 clinicians in this Medicare group
Park City, IL 60085
- Reassigned Medicare billing, Illinois enrollment
- 10 clinicians in this Medicare group
Park City, IL 60085
- Reassigned Medicare billing, Illinois enrollment
- 8 clinicians in this Medicare group
Schaumburg, IL 60173
- Reassigned Medicare billing, Illinois enrollment
- 9 clinicians in this Medicare group
Arlington Heights, IL 60004
- Reassigned Medicare billing, Illinois enrollment
- 15 clinicians in this Medicare group
Lake Forest, IL 60045
- Reassigned Medicare billing, Illinois enrollment
- 12 clinicians in this Medicare group
Addison, IL 60101
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Fmgc Sc
- 14 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.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98102 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
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 Timothy Tan's NPI number?
The NPI number for Timothy Tan is 1205272507. It was assigned to this individual provider in the NPPES registry on May 14, 2013.
Where is Timothy Tan located?
Timothy Tan practices at 2815 Eastlake Ave E Ste 240, Seattle, WA 98102. The listed phone number is (503) 906-7300.
What is Timothy Tan's specialty?
The primary specialty registered for this NPI is Pathology, specializing in Dermatopathology, with taxonomy code 207ZD0900X.
Is Timothy Tan enrolled in Medicare?
Yes. Timothy Tan 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 Timothy Tan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Tan reassigns Medicare benefits to 14 organizations: Curtis T. Thompson, M.D. & Associates, PLLC (Beaverton, OR), Dermatology Specialists Of Illinois, Ltd (Algonquin, IL), Bakal Dermatology Associates, S.C. (Hoffman Estates, IL), Gastroenterologists Ltd (Libertyville, IL), North Shore Urogynecology Ltd (Park City, IL) and 9 more organizations, listed in the Medicare section above. 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 Timothy Tan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Timothy Tan accept?
Health plans from Moda Health Plan, Inc., Oscar Health and Providence Health Plan list Timothy Tan 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 Timothy Tan was last updated on September 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 47 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.