Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Palaniappan Chidambaram, MD

Individual provider Internal Medicine Physician · NPI 1770651200

Palaniappan Chidambaram, MD practises Addiction Medicine in Portland, Oregon. Qualified in 1994, 32 years ago. Practices with Providence Health and Services Oregon, a 1,426-clinician group and accepts Medicare assignment. Licensed in Michigan and Oregon.

Years since qualifying
32
Licensed in
MI, OR
In the registry since
2006
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

5251 NE Glisan St Bldg A 2ND Fl
Portland, OR 97213-3052
Phone: (503) 215-4860
Fax: (503) 215-4839
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD173966 (OR)
Internal Medicine Physician Taxonomy 207R00000X · Licence 4301081783 (MI)
Addiction Medicine (Internal Medicine) Physician Taxonomy 207RA0401X · Licence MD173966 (OR)

Record details

NPI number1770651200
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 1, 2006
Last updated in NPPESFebruary 19, 2021
Certification dateFebruary 19, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyADDICTION MEDICINE
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1994 (32 years in practice)
Group practice Providence Health And Services Oregon — 1426 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients26
Services billed 72 a service is one billed item, such as a visit, a test or a procedure
Average patient age59

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Providence Health and Services Oregon

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1426 clinicians in the practice; 12 are shown here.

Other providers in Portland