Quick answers
- Does Palaniappan Chidambaram accept Medicare assignment?
- Yes. Medicare's clinician data says Palaniappan Chidambaram accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Palaniappan Chidambaram see?
- In 2024, CMS data shows 26 Original Medicare patients and 72 services for Palaniappan Chidambaram. This counts Original Medicare only and measures volume, not quality.
- What is Palaniappan Chidambaram's NPI number?
- 1770651200. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Palaniappan Chidambaram, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 26 |
|---|---|
| Services billed to Medicare | 72 |
| Different services or procedures | 5 |
| Participating Medicare provider | Yes |
| Average age of these patients | 59 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)39 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)28 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- Anxiety69%
- Arthritis58%
- Depression54%
- Diabetes50%
- Heart failure50%
Hospitals where Palaniappan Chidambaram works
Medicare's Facility Affiliation Data lists Palaniappan Chidambaram at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Providence St Vincent Medical CenterPortland, OR · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 380004
Practice locations
Addresses where Palaniappan Chidambaram is enrolled with Medicare (CMS data updated October 2, 2026).
- 7305 SE Circuit Dr, Suite 180Hillsboro, OR 97129 (971) 501‑4930
Group practices
Medicare enrollment lists Palaniappan Chidambaram as a member of this group (CMS data updated October 2, 2026).
- Providence Health and Services Oregon1,433 clinicians in the group
Specialties
- Addiction Medicineprimary
- Internal Medicinealso
Other addiction medicine doctors in Oregon
Clinicians with the same Medicare primary specialty in Oregon — not a recommendation.
Other clinicians in Providence Health and Services Oregon
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1994 (32 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1770651200 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians