Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mark Tieman, MD, PC

Organization Primary Care Clinic/Center · NPI 1821375940

Mark Tieman, MD, PC is a Primary Care Clinic/Center in Commack, New York. Licensed in New York. Registered with an NPI since 2011.

Licensed in
NY
In the registry since
2011
What do these letters mean?
PC — Professional corporation
A form of business registration, not a clinical qualification.

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Practice location Address checks out

356 Veterans Memorial Hwy
Commack, NY 11725-4343
Phone: (631) 858-0400
Fax: (631) 543-2785
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Primary Care Clinic/Center (primary) Taxonomy 261QP2300X · Licence 179172 (NY)

Record details

NPI number1821375940
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mark Tieman — President · (631) 424-9844
NPI enumeratedNovember 3, 2011
Last updated in NPPESNovember 3, 2011
Mailing address34 Copperdale Ln, Huntington, NY 11743-2523

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