PALANIAPPAN CHIDAMBARAM (M.D.) – Internal Medicine Physician, NPI 1770651200
Internal Medicine Physician
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Profile Insights
NPPES metrics only — not quality of care.
29 ADDICTION MEDICINE in OR
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Provider Addresses for PALANIAPPAN CHIDAMBARAM (M.D.)
3158, Southwest 87th Avenue, Portland, Metro, Washington County, Oregon, 97225, United States
PORTLAND, OR 972083158
Phone:
Type: Mailing
5251, Northeast Glisan Street, North Tabor, Portland, Metro, Multnomah County, Oregon, 97213, United States
BLDG A, 2ND FLOOR
PORTLAND, OR 972133052
Phone: (503) 215-4860
Fax: (503) 215-4839
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2024-12-03
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20150821013220 | I | Addiction Medicine | OR | TBD |
| I20241203001659 | I | Addiction Medicine | AK | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 74 | 28 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 44 | 38 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 26 | 12 | $0 |
Insurance plans in this area (ZIP 97208)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | NY | |
| Clinical Social Worker | IN | |
| Mental Health Counselor | OR | |
| Clinical Social Worker | AK |
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