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

John G Leiner, MD

Individual provider Internal Medicine Physician · NPI 1962571596

John G Leiner, MD is an Internal Medicine in Quincy, Illinois. Graduated from Virginia Commonwealth University, School of Medicine in 1991, 35 years ago. Practices with Blessing Hospital, a 413-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois and Virginia.

Years since qualifying
35
Trained at
Virginia Commonwealth University, School of Medicine
Licensed in
IL, VA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

927 Broadway St
Quincy, IL 62301-2719
Phone: (217) 224-6423
Fax: (217) 228-3251
Show map & directions

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

Additional practice locations (1)

  • 4800 Maine St, Quincy, IL 62305-5875 — (217) 223-8400

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036171859 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 0101224017 (VA)

Record details

NPI number1962571596
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 7, 2006
Last updated in NPPESJanuary 20, 2025
Certification dateJanuary 20, 2025
Mailing address1005 Broadway St, Quincy, IL 62301-2834

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolVIRGINIA COMMONWEALTH UNIVERSITY, SCHOOL OF MEDICINE
Graduated 1991 (35 years in practice)
Group practice Blessing Hospital — 413 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Other providers in Quincy