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DR. ANTON OSTASHKO
NPI 1134617459
Psychiatry & Neurology - Neurology in Mountain View, CA

Active since April 23, 2018Opted out of Medicare · through Aug 12, 2027
2500 HOSPITAL DR STE 4B, MOUNTAIN VIEW, CA 94040(650) 492-7999(650) 305-7999 Get Directions Write a Review

NPPES record last updated: December 3, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Dec 3, 2025, Oct 5, 2022, Aug 19, 2022 and 2 more (5 updates tracked since 2018).

About Dr. Anton Ostashko NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. ANTON OSTASHKO (NPI 1134617459) is an individual neurology provider in Mountain View, California, licensed in California (A175602) and active in the NPI registry since April 2018. He has opted out of Medicare through August 12, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1134617459
Entity TypeIndividualMale
Primary Taxonomy2084N0400X
Provider Legal NameDR. ANTON OSTASHKO
Location Address2500 HOSPITAL DR STE 4BMountain View, CA 94040-4110
Mailing Address2500 Hospital Dr Ste 4bMountain View, CA 94040-4110 · (650) 492-7999 · Fax (650) 305-7999
Phone(650) 492-7999
Fax(650) 305-7999
Sole ProprietorNo
Enumeration DateApril 23, 2018
Last NPPES UpdateDecember 3, 20255 updates tracked since enumeration
NPPES CertifiedDecember 3, 2025
✔ NPI 1134617459 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians
Taxonomy Code2084N0400X
License✔ Licensed in CA · A175602
Definition
A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.
2500 HOSPITAL DR STE 4B, Mountain View, CA 94040
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

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Opted out of Medicare

Dr. Anton Ostashko has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from August 12, 2023 through August 12, 2027.

Opt-Out Effective DateAugust 12, 2023
Opt-Out In Effect ThroughAugust 12, 2027Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94040 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
Established Patient
$121.77 typical visit price
range $23.96 – $169.60
Typical copayment $30.44 (range $5.99 – $42.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

BILEG MD
Clinic/Center (Primary Care)
2500 HOSPITAL DR STE 4B
MOUNTAIN VIEW, CA 94040
Santa Clara County (650) 669-8581

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Anton Ostashko's NPI number?

The NPI number for Anton Ostashko is 1134617459. It was assigned to this individual provider in the NPPES registry on April 23, 2018.

Where is Anton Ostashko located?

Anton Ostashko practices at 2500 Hospital Dr Ste 4B, Mountain View, CA 94040. The listed phone number is (650) 492-7999.

What is Anton Ostashko's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Is Anton Ostashko enrolled in Medicare?

No. Anton Ostashko has opted out of Medicare through August 12, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Anton Ostashko was last updated on December 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.