Ostap Melnyk, MD
NPI 1205834702 · Hematology & Oncology Physician · San Leandro, CA
Ostap Melnyk, MD is a Hematology & Oncology Physician provider in San Leandro, CA (NPI 1205834702).
Provider details
- NPI number
- 1205834702
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G66164 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
595 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 176 | $9 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 76 | $18 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 74 | $111 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 68 | $111 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 61 | $157 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 49 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Letrozole | 66 | 31 |
| Hydroxyurea | 41 | 18 |
| Prochlorperazine Maleate | 32 | 15 |
| Omeprazole | 28 | — |
| Acyclovir | 26 | 12 |
| Zanubrutinibbrand: Brukinsa | 26 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 25 | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,141 across 44 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-08
- Last updated
- 2013-05-14
Frequently asked questions
- What is Ostap Melnyk's NPI number?
- Ostap Melnyk's National Provider Identifier (NPI) is 1205834702, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ostap Melnyk's specialty?
- Ostap Melnyk is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Ostap Melnyk located?
- Ostap Melnyk's practice location on file with NPPES is 13847 E 14th St, San Leandro, CA 94578-2626.
- What is Ostap Melnyk's phone number?
- The practice phone number listed in the NPPES registry for Ostap Melnyk is (510) 483-2555.
- Is Ostap Melnyk's NPI active?
- Yes — Ostap Melnyk's NPI (1205834702) is active in the NPPES registry as of the last update on 2013-05-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.