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

Dr. Mark John Hosak, MD

Individual provider Emergency Medicine Physician · NPI 1871889949

Dr. Mark John Hosak, MD is an Emergency Medicine in Bethlehem, Pennsylvania. Qualified in 2011, 15 years ago. Practices with St Lukes Physician Group Inc, a 2,127-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
15
Licensed in
PA
In the registry since
2011
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

801 Ostrum St
Bethlehem, PA 18015-1000
Phone: (610) 954-4000
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence MD450419 (PA)

Record details

NPI number1871889949
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 27, 2011
Last updated in NPPESMarch 31, 2014
Mailing address1021 Devonshire Rd, Allentown, PA 18103-5615

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 2011 (15 years in practice)
Group practice St Lukes Physician Group Inc — 2127 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Bethlehem