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

Johnnie Mao, MD

Individual provider Internal Medicine Physician · NPI 1710410071

Johnnie Mao, MD is an Internal Medicine in Bethlehem, Pennsylvania. Qualified in 2016, 10 years ago. Practices with Gslpg, Inc, a 267-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
10
Licensed in
PA
In the registry since
2017
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: (484) 526-4658
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

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD470972 (PA)

Record details

NPI number1710410071
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 4, 2017
Last updated in NPPESMay 2, 2022
Certification dateMay 2, 2022
Mailing address801 Ostrum St, Bethlehem, PA 18015-1000

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Group practice Gslpg, Inc — 267 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Other providers in Bethlehem