Chelsea Tieszen, MD, MS

Addiction Medicine · Internal Medicine · Geriatrics

13+ years in practiceNPI: 1518200377Licensed in OR

About

Bio coming soon.

Are you Chelsea Tieszen, MD, MS?

Claim your profile

Verify your identity, update your credentials, and take ownership of your listing on PBCMMG.

Claim Profile

Credentials & Recognition

Specialties

Addiction MedicineInternal MedicineGeriatrics

NPI sub-specialties

Internal Medicine207R00000X

Internal Medicine, Geriatric Medicine207RG0300X

Practice Signals

Editorial signals beyond credentials. Patient transparency over opacity. See methodology.

Mid-Level (PA/NP) Use

Doctor-led visits

Years in Practice

13+ years

Estimated from NPI enumeration date

Featured in PBCMMG Rankings

#5

Top Geriatricians in Oregon, 2026

Geriatrics · Oregon · 2026

Other Addiction Medicine Doctors near Oregon

View all →

Dr. Janette Coelho Leal, MD

Oregon, OR · Board cert · 15+ yrs

Dr. Thuy Nguyen, MD

Oregon, OR · Board cert · 13+ yrs

Dr. Soraya Abbassian, MD

Oregon, OR · 21+ yrs

Dr. Jacob Abraham, MD

Oregon, OR · 21+ yrs

Dr. Anupama Acheson, MD

Oregon, OR · 21+ yrs

Dr. Alfredo Aguirre, MD

Oregon, OR · 21+ yrs

Frequently Asked Questions about Dr. Chelsea Tieszen, MD, MS

Where does Dr. Chelsea Tieszen, MD, MS practice?+
Dr. Chelsea Tieszen, MD, MS practices in Oregon, OR. 17727 E BURNSIDE ST PORTLAND, OR 972334803.
What is Dr. Chelsea Tieszen, MD, MS's phone number?+
Dr. Chelsea Tieszen, MD, MS's practice phone is 503-215-9800. Office contact information is verified on the PBCMMG profile.
What does Dr. Chelsea Tieszen, MD, MS specialize in?+
Dr. Chelsea Tieszen, MD, MS's primary specialty is Addiction Medicine, with additional focus on Internal Medicine, Geriatrics.
Is Dr. Chelsea Tieszen, MD, MS board certified?+
Board certification status for Dr. Chelsea Tieszen, MD, MS has not been verified in the data sources PBCMMG uses (ABMS, state medical boards). The PBCMMG profile shows their current credential set.
How long has Dr. Chelsea Tieszen, MD, MS been practicing?+
Dr. Chelsea Tieszen, MD, MS has been in active practice for 13+ years, based on NPI enumeration and state licensing records.
What is Dr. Chelsea Tieszen, MD, MS's NPI number?+
Dr. Chelsea Tieszen, MD, MS's National Provider Identifier (NPI) is 1518200377, registered in the federal NPPES registry.

Profile maintained by Palm Beach County Medical Media Group, Inc. | Data verified from public registries (NPPES, ABMS, state medical boards). Methodology · Editorial Standards

See an error? info@pbcmmg.com

Are you Chelsea Tieszen, MD, MS?

Claim & complete your profile →

Verify identity, upload proof, and update credentials. Approval typically 1-2 business days.