PALANIAPPAN CHIDAMBARAM M.D.
NPI 1770651200
Internal Medicine in Portland, OR
About Palaniappan Chidambaram M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
PALANIAPPAN CHIDAMBARAM M.D. (NPI 1770651200) is an individual internal medicine provider in Portland, Oregon, licensed in Oregon (MD173966) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS, is affiliated with Providence St Vincent Medical Center, and is a graduate of Other (1994).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Palaniappan Chidambaram M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show Palaniappan Chidambaram reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Portland, OR 97213
- Reassigned Medicare billing, Oregon enrollment
- 1,501 clinicians in this Medicare group
Portland, OR 97213
- Reassigned Medicare billing, Oregon enrollment
- 676 clinicians in this Medicare group
Portland, OR 97225
- Reassigned Medicare billing, Oregon enrollment
- 753 clinicians in this Medicare group
Redwood City, CA 94065
- Reassigned Medicare billing, Alaska and Oregon enrollments
- 4 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Providence St Vincent Medical Center
Acute Care Hospitals · Portland, ORPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 97213 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PORTLAND, OR 97213
PORTLAND, OR 97213
PORTLAND, OR 97213
PORTLAND, OR 97213
PORTLAND, OR 97213
PORTLAND, OR 97213
PORTLAND, OR 97213
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Palaniappan Chidambaram's NPI number?
The NPI number for Palaniappan Chidambaram is 1770651200. It was assigned to this individual provider in the NPPES registry on December 1, 2006.
Where is Palaniappan Chidambaram located?
Palaniappan Chidambaram practices at 5251 NE Glisan St Bldg A, 2nd Floor, Portland, OR 97213. The listed phone number is (503) 215-4860.
What is Palaniappan Chidambaram's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Palaniappan Chidambaram enrolled in Medicare?
Yes. Palaniappan Chidambaram is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Palaniappan Chidambaram's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Palaniappan Chidambaram reassigns Medicare benefits to 4 organizations: Providence Health & Services Oregon (Portland, OR), Providence Health & Services - Oregon (Portland, OR), Providence Health & Services - Oregon (Portland, OR) and Ah Addiction Care PC (Redwood City, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Palaniappan Chidambaram's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Palaniappan Chidambaram accept?
Health plans from BridgeSpan Health Company, Providence Health Plan and Regence BlueCross BlueShield of Oregon list Palaniappan Chidambaram as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Palaniappan Chidambaram affiliated with any hospitals?
According to CMS data, Palaniappan Chidambaram is affiliated with Providence St Vincent Medical Center.
When was this NPI record last updated?
The NPPES record for Palaniappan Chidambaram was last updated on February 19, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Palaniappan Chidambaram, M.D. · NPI 1770651200
Internal Medicine physician in Portland, Oregon. Individual provider, active in the CMS NPPES registry since December 1, 2006.
## Identity
- **NPI:** 1770651200 (Entity type: Individual)
- **Enumerated:** December 1, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** MD173966 (Oregon)
- **Sole proprietor:** No
## Practice location
- **Address:** 5251 NE GLISAN ST, BLDG A, 2ND FLOOR, Portland, OR 97213-3052
- **Phone:** (503) 215-4860 · **Fax:** (503) 215-4839
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Providence Health & Services Oregon (NPI 1093963209, Portland, OR); Providence Health & Services - Oregon (NPI 1003991845, Portland, OR); Providence Health & Services - Oregon (NPI 1235259532, Portland, OR); Ah Addiction Care PC (NPI 1295516128, Redwood City, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1994
## Record status
- **NPPES last updated:** February 19, 2021
- **Other identifiers:** Medicaid 476636810 (MI); Medicaid 500690117 (OR)
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Source: [NPI Profile](https://npiprofile.com/npi/1770651200) · Data from the CMS NPPES public registry.