DR. OSTAP G MELNYK (MD) – Hematology & Oncology Physician, NPI 1205834702
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Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,531 HEMATOLOGY/ONCOLOGY in CA
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Provider Addresses for DR. OSTAP G MELNYK (MD)
4721, Dallas Ranch Road, Antioch, Contra Costa County, California, 94531, United States
ANTIOCH, CA 945318811
Phone: (925) 778-0679
Fax: (925) 778-3567
Type: Mailing
13847;13889;13899;13901, East 14th Street, San Leandro, Alameda County, California, 94577, United States
SUITE 217
SAN LEANDRO, CA 945782626
Phone: (510) 483-2555
Fax: (510) 483-1856
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 197 Open Payments records for all available years, with a total value of $4,440.
Total Amount is formed as General ($4,440) + Research ($0) + Ownership ($0) = $4,440.
Last reported payment date: 2024-10-16 • Largest payer in this snapshot: PFIZER INC. ($421).
Total Amount
$4,440
General + Research + Ownership
Payments
197
Total payment records
General Amount
$4,440
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-16
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| PFIZER INC. | $421 |
| Janssen Biotech, Inc. | $320 |
| Astellas Pharma US Inc | $261 |
| Merck Sharp & Dohme LLC | $256 |
| E.R. Squibb & Sons, L.L.C. | $177 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
No Medicare enrollment or revalidation data available for this provider in our database.
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 |
|---|---|---|---|---|
| J0897 | Injection, denosumab, 1 mg | 10,380 | 31 | $0 |
| J1437 | Injection, ferric derisomaltose, 10 mg | 3,000 | 21 | $0 |
| Q9967 | Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml | 2,500 | 22 | $0 |
| A9585 | Injection, gadobutrol, 0.1 ml | 2,250 | 27 | $0 |
| J1100 | Injection, dexamethasone sodium phosphate, 1 mg | 1,260 | 20 | $0 |
Insurance plans in this area (ZIP 94531)
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Provider's Procedures
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