Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1598435117 Individual Practitioner Male Practitioner

Mark Levi Briggs , LMHCA

Counselor • Issaquah, WA

Professional Overview & Biography Verified Profile Summary

Mark Briggs, LMHCA is a registered healthcare professional specializing in Counselor in Issaquah, WA. Practice services are available at PO BOX 3057 under active NPI credentials.

Practice Location & Contact Primary Location

Practice Address

Po Box 3057

Issaquah, WA 980270137

Telephone 4258352503
Fax 4252855436
Associated Practice Facility / Clinic

Specialty Benchmarks & Practice Insights

Comparative analytics for Counselor in Issaquah, WA

Active Practitioner
Practitioner Clinical Experience
Active
City Avg: 10.5 Yrs
State Avg: 13.0 Yrs
Regional Practice Density
12 Specialists

Practicing in Issaquah, WA (11556 Statewide)

Telehealth Adoption Rate
0.0% 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

CMS Verified: 2026-01-06
Counselor Primary Specialty

NUCC Taxonomy Code: 101Y00000X

State License WA CG61099654

A provider who is trained and educated in the performance of behavior health services through interpersonal communications and analysis. Training and education at the specialty level usually requires a master's degree and clinical experience and supervision for licensure or certification.

Practice Associates & Co-Workers

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

16 Associated Practitioners
NPI 1003522947

Master of Science

Maria Greenbaum , LMP

Massage Therapist

NPI 1043519036

Licensed Massage Practitioner

NPI 1134653934

Licensed Massage Practitioner, NASMCPT

Katherine Pond

Dietitian, Registered

NPI 1245006592
Carsten Rode

Acupuncturist

NPI 1295136026
NPI 1346940558

Career & Practice History Timeline

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

9 Historical Events
📍
Updated Practice Location January 06, 2026

Registered at PO BOX 3057, ISSAQUAH, WA 980270137 (Tel: 4258352503)

📍
Updated Business Mailing Address January 06, 2026

Registered at PO BOX 3057, ISSAQUAH, WA 980270137 (Tel: 4258352503)

👤
Provider Name / Credentials Updated January 06, 2026

Recorded as MARK BRIGGS, LMHCA

NPI Profile Active September 15, 2021

NPI status registered as active in NPPES database

📍
Updated Practice Location September 15, 2021

Registered at 2150 FREEMAN RD E, FIFE, WA 984243776 (Tel: 2539227833)

📍
Updated Business Mailing Address September 15, 2021

Registered at 2701 N 16TH ST STE 316, PHOENIX, AZ 850061266 (Tel: 6025713163)

👤
Provider Name / Credentials Updated September 15, 2021

Recorded as MARK BRIGGS

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) September 15, 2021

Counselor (License #CG61099654 in WA)

🟢
Initial NPI Registration & Enumeration September 15, 2021

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1598435117
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: September 15, 2021
Last Update: January 06, 2026
Sole Proprietor: No

Mailing Address

Po Box 3057

Issaquah, WA 980270137

Phone: 4258352503

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.