Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ostap G Melnyk, MD

Q: What is the NPI number for Ostap Melnyk?

The National Provider Identifier (NPI) for Ostap Melnyk is 1205834702, a Type 1 (individual) record in the CMS NPPES registry.

Hematology & Oncology Physician in San Leandro, CA · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1205834702

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Registry record

Entity type Individual (Type 1)

Name Dr. Ostap G Melnyk

Credential MD

Sex Male

Practice address 13847 E 14th St, Suite 217, San Leandro, CA, 94578

Phone (510) 483-2555

Fax (510) 483-1856

Enumeration date Jul 8, 2005

Last updated in NPPES May 14, 2013

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License G66164 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Ostap Melnyk?

The National Provider Identifier (NPI) for Ostap Melnyk is 1205834702, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ostap Melnyk practice?

The practice location on file with NPPES is in San Leandro, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-05-14.