DR. ANDREW TZONG-YOW CHEN (D.O.) – Hematology & Oncology Physician, NPI 1124081096
Hematology & Oncology Physician
Main info
Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
171 HEMATOLOGY/ONCOLOGY in OR
Provider Addresses for DR. ANDREW TZONG-YOW CHEN (D.O.)
1501 NE Medical Center Dr
Bend, OR 977016051
Phone: (541) 382-2811
Type: Location
2500 NE NEFF RD
BEND, OR 977016015
Phone: (541) 706-5800
Fax: (541) 706-5911
Type: Location
1501, Northeast Medical Center Drive, Bend, Deschutes County, Oregon, 97701, United States
BEND, OR 977016051
Phone:
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 5 Open Payments records for all available years, with a total value of $558.
Total Amount is formed as General ($558) + Research ($0) + Ownership ($0) = $558.
Last reported payment date: 2024-10-17 • Largest payer in this snapshot: Astellas Pharma US Inc ($199).
Total Amount
$558
General + Research + Ownership
Payments
5
Total payment records
General Amount
$558
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-17
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Astellas Pharma US Inc | $199 |
| Genentech USA, Inc. | $122 |
| Janssen Biotech, Inc. | $120 |
| Amgen Inc. | $117 |
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: 2005-09-06
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
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 |
|---|---|---|---|---|
| I20050906001073 | I | Hematology/Oncology | OR | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 534 | 268 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 477 | 123 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 54 | 54 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 24 | 24 | $0 |
| 38222 | Biopsy and aspiration of bone marrow sample for diagnosis | 12 | 12 | $0 |
Insurance plans in this area (ZIP 97701)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| HEMATOLOGY/ONCOLOGY | OR | 96375 | Injection of different drug or substance into a vein for therapy, diagnosis, or prevention | 71 | 27 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | OR | |
| Orthopedic Surgery | NM | |
| Family Practice | OR | |
| Nurse Practitioner | OR | |
| Hand Surgery | OR | |
| Diagnostic Radiology | OR | |
| Physician Assistant | OR | |
| Nurse Practitioner | OR | |
| - | OR | |
| General Surgery | OR |
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