Mark Sienko, MD

Oncology

20+ years in practiceNPI: 1932146552Licensed in WA

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Credentials & Recognition

Specialties

Oncology

NPI sub-specialties

Internal Medicine, Medical Oncology207RX0202X

Internal Medicine, Hematology & Oncology207RH0003X

Practice Signals

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

Mid-Level (PA/NP) Use

Doctor-led visits

Years in Practice

20+ years

Estimated from NPI enumeration date

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Frequently Asked Questions about Dr. Mark Sienko, MD

Where does Dr. Mark Sienko, MD practice?+
Dr. Mark Sienko, MD practices in Washington, WA. 844 N 5TH AVE SEQUIM, WA 983823045.
What is Dr. Mark Sienko, MD's phone number?+
Dr. Mark Sienko, MD's practice phone is 360-683-9895. Office contact information is verified on the PBCMMG profile.
What does Dr. Mark Sienko, MD specialize in?+
Dr. Mark Sienko, MD's primary specialty is Oncology.
Is Dr. Mark Sienko, MD board certified?+
Board certification status for Dr. Mark Sienko, MD 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. Mark Sienko, MD been practicing?+
Dr. Mark Sienko, MD has been in active practice for 20+ years, based on NPI enumeration and state licensing records.
What is Dr. Mark Sienko, MD's NPI number?+
Dr. Mark Sienko, MD's National Provider Identifier (NPI) is 1932146552, 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

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