Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1891802641 Individual Practitioner Female Practitioner

Mary Katherine Siemon , RN ARNP

Nurse Practitioner • Seattle, WA

Professional Overview & Biography Verified Profile Summary

Mary Siemon, RN ARNP is a registered healthcare professional specializing in Nurse Practitioner in Seattle, WA. Practice services are available at 180 NICKERSON ST under active NPI credentials.

Practice Location & Contact Primary Location

Practice Address

180 Nickerson St
Ste 303

Seattle, WA 981091631

Telephone 2062848963
Associated Practice Facility / Clinic

Specialty Benchmarks & Practice Insights

Comparative analytics for Nurse Practitioner in Seattle, WA

Active Practitioner
Practitioner Clinical Experience
Active
City Avg: 10.3 Yrs
State Avg: 11.0 Yrs
Regional Practice Density
574 Specialists

Practicing in Seattle, WA (2339 Statewide)

Telehealth Adoption Rate
28.6% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Medical Specialties & State Licenses

Nurse Practitioner Primary Specialty

NUCC Taxonomy Code: 363L00000X

State License WA AP30004897

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

Registered Nurse

NUCC Taxonomy Code: 163W00000X

State License WA RN00048036

(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive either a diploma from a hospital program, an associate degree in nursing (A.D.N.) or a Bachelor of Science degree in nursing (B.S.N.), who is licensed or certified by the state, and is practicing within the scope of that license or certification. R.N.'s assist patient in recovering and maintaining their physical or mental health. They assist physicians during treatments and examinations and administer medications. (2) A provider who is trained and educated in a formal nursing education program at an accredited school of nursing, passes a national certification examination, and is licensed by the state to practice nursing. The individual provides nursing services to patients or clients in areas such as health promotion, disease prevention, acute and chronic care and restoration and maintenance of health across the life span.

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

7 Associated Practitioners
Cristi Thielman , LMHC

Counselor - Mental Health

NPI 1417011305

Licensed Mental Health Counselor

Nicole Lincoln , MA, LMHC

Counselor - Mental Health

NPI 1558752758

Master of Arts, Licensed Mental Health Counselor

Julie Davidson , MC60560021

Counselor - Mental Health

NPI 1619410123
Cynthia Swanson , MA, LMHC

Counselor - Mental Health

NPI 1629112800

Master of Arts, Licensed Mental Health Counselor

Jennifer Loser , MS

Marriage & Family Therapist

NPI 1699125054

Master of Science

Shane Bush , LMP

Massage Therapist

NPI 1700896800

Licensed Massage Practitioner

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events
NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍
Updated Practice Location July 08, 2007

Registered at 180 NICKERSON ST, STE 303, SEATTLE, WA 981091631 (Tel: 2062848963)

📍
Updated Business Mailing Address July 08, 2007

Registered at 180 NICKERSON ST, STE 303, SEATTLE, WA 981091631 (Tel: 2062848963)

👤
Provider Name / Credentials Updated July 08, 2007

Recorded as MARY SIEMON, RN ARNP

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Registered Nurse (License #RN00048036 in WA)

🟢
Initial NPI Registration & Enumeration August 25, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

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NPI Administrative Meta

NPI Number: 1891802641
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: August 25, 2006
Last Update: September 11, 2025
Sole Proprietor: No

Mailing Address

180 Nickerson St, Ste 303

Seattle, WA 981091631

Phone: 2062848963

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.