Organization Profile
Mark Tieman, MD, PC
Unclaimed ProfileAbout Mark Tieman, MD, PC
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Practice Size
Counted from individual NPI records registered at the same street address; a shared building can inflate this.
Providers in This Building & Nearby
From registry street addresses: providers filed at this building, which can include unrelated practices sharing it.
- Danielle P. Bissett, PsyD Psychologist — Clinical
- Sarah F. Powers, N.P. Nurse Practitioner
- Cindy Demetriou Nurse Practitioner — Adult Health
- Karen L. Defalco, PsyD Psychologist
- Mark D. Tieman, M.D. Internal Medicine
- Linda R. Jonas, PhD Psychologist
- Barbara A. Herd, PhD Psychologist — Clinical
- Marsha Alexander, D.O Child & Adolescent Psychiatry
- Rachna S. Sondhi, M.D. Child & Adolescent Psychiatry
- Barbara E. Fisher, PhD Psychologist — Clinical
Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (631) 858-0400
- Email not available
Practice Locations
356 VETERANS MEMORIAL HWY
Commack, NY 11725
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
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.
Common questions
What does Mark Tieman, MD, PC specialize in?
Mark Tieman, MD, PC is a primary care clinic in Commack, NY. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Mark Tieman, MD, PC located?
Mark Tieman, MD, PC is listed at 356 Veterans Memorial Hwy, Commack, NY 11725. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Mark Tieman, MD, PC's phone number?
The number on file is (631) 858-0400. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Mark Tieman, MD, PC's NPI number?
Mark Tieman, MD, PC's National Provider Identifier is 1821375940. 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
Has Mark Tieman, MD, PC confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Mark Tieman, MD, PC. If this is you, claiming it is free.
Guide.md
Is this your practice?
Manage this listing? Log in or create an account, then click “This is my practice and I manage it” here. A verified physician whose registry address matches this location is approved instantly; everyone else is reviewed by a person.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.