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

Mark H Gregory MD PC

Organization Internal Medicine Physician · NPI 1033588256

Mark H Gregory MD PC is an Internal Medicine Physician in Saint Louis, Missouri. Licensed in Missouri. Registered with an NPI since 2015.

Licensed in
MO
In the registry since
2015
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

555 N New Ballas Rd Ste 101
Saint Louis, MO 63141-6825
Phone: (314) 872-8470
Fax: (314) 872-8471
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 100578 (MO)

Record details

NPI number1033588256
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mark Gregory — Owner · (314) 872-8470
NPI enumeratedSeptember 17, 2015
Last updated in NPPESSeptember 17, 2015
Mailing addressPo Box 445, Sullivan, MO 63080-0445

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