Physician Profile
Mark Sivak, M.D.
Unclaimed ProfileAbout Dr. Sivak
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Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (212) 241-7076
- Email not available
Practice Locations
5 EAST 98 ST, 7TH FLOOR
New York, NY 10029
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other neurologists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 3
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 8 related providers in 1 group
Common questions
What does Mark Sivak specialize in?
Mark Sivak is a neurologist in New York, NY. That is the designation recorded for this NPI in the federal registry, where it is listed as “Neurology”.
NPI registry
Where is Mark Sivak located?
Mark Sivak is listed at 5 East 98 St, 7Th Floor, New York, NY 10029. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Mark Sivak's phone number?
The number on file is (212) 241-7076. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Mark Sivak's NPI number?
Mark Sivak's National Provider Identifier is 1417928896. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How long has Mark Sivak been practicing?
Mark Sivak has 20+ years experience. Registered with an NPI since 2006. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
Has Mark Sivak confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Mark Sivak. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.