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Mark Tieman, MD, PC
Mark Tieman, MD, PC is a clinic in Commack, NY. Its NPI registration 1821375940 is active on the issuer's file, checked Nov 3, 2026.
Mark Tieman, MD, PC
Clinic · 356 Veterans Memorial Hwy, Commack, NY 11725
NPI registration 1821375940Activechecked Nov 3, 2026
- ClassClinic/Center, Primary Care
- Where356 Veterans Memorial Hwy, Commack, NY 11725 · serves New York
Requests for this kind of business are not sent through DouxProcess. Call the office directly.
Listing details
What the issuer's record says
- Status
- NPI registration active
- NPI registration
- US-CMS-NPPES 1821375940
- Classes
- Clinic/Center, Primary Care
- Checked
- Nov 3, 2026, against the NPPES health care organizations (NPI Type 2)
The business
- What they do
- Clinic
- Where
- 356 Veterans Memorial Hwy, Commack, NY 11725
- Serves
- New York
- Phone
- (631) 858-0400
- Listing updated
- Oct 24, 2026
- Listing
- Built from public records. Not claimed yet.
From the government record
- Licensed Not in the record NPI registration 1821375940 is active; it is a registration, not a license.
Checked Nov 3, 2026 from the NPPES NPI registry file · view record
- Bonded Not in the record The NPPES NPI registry file does not say whether the business is bonded.
Checked Nov 3, 2026 from the NPPES NPI registry file · view record
- Insured Not in the record The NPPES NPI registry file does not say whether the business is insured.
Checked Nov 3, 2026 from the NPPES NPI registry file · view record
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Listing updated Oct 24, 2026. Hide an address, correct or remove this listing.