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

Dr. Mark Steven Costello Jr., MD

Individual provider Otolaryngology Physician · NPI 1497103550

Dr. Mark Steven Costello Jr., MD is an Otolaryngology in Charleston, South Carolina. Graduated from University of Cincinnati College of Medicine in 2016, 10 years ago. Practices with Christ Hospital Medical Specialists LLC, a 130-clinician group and accepts Medicare assignment. Licensed in South Carolina.

Years since qualifying
10
Trained at
University of Cincinnati College of Medicine
Licensed in
SC
In the registry since
2016
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

169 Ashley Ave Rm 202 Main Hospital MSC333
Charleston, SC 29425-8905
Phone: (843) 792-8299
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

Otolaryngology Physician (primary) Taxonomy 207Y00000X · Licence MMD.39504 LL (SC)

Record details

NPI number1497103550
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 31, 2016
Last updated in NPPESMay 31, 2016

Medicare enrollment

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

Medicare specialtyOTOLARYNGOLOGY
Medical schoolUNIVERSITY OF CINCINNATI COLLEGE OF MEDICINE
Graduated 2016 (10 years in practice)
Group practice Christ Hospital Medical Specialists Llc — 130 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Charleston