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

John P Hammerstein, MD

Individual provider Orthopaedic Surgery of the Spine Physician · NPI 1265573307

John P Hammerstein, MD is an Orthopedic Surgery in Linton, Indiana. Graduated from Indiana University School of Medicine in 2002, 24 years ago. Practices with Greene County General Hospital, a 98-clinician group and accepts Medicare assignment. Licensed in Indiana.

Years since qualifying
24
Trained at
Indiana University School of Medicine
Licensed in
IN
In the registry since
2007
Specialties on file
3
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

1043 N 1000 W
Linton, IN 47441
Phone: (812) 847-3381
Show map & directions

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

Specialties & licences

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence 01065333A (IN)
Orthopaedic Surgery of the Spine Physician Taxonomy 207XS0117X · Licence 01065333A (IN)
Sports Medicine (Orthopaedic Surgery) Physician Taxonomy 207XX0005X · Licence 01065333A (IN)

Record details

NPI number1265573307
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 10, 2007
Last updated in NPPESMay 5, 2023
Certification dateMay 5, 2023
Mailing address1043 N 1000 W, Linton, IN 47441-5281

Medicare enrollment

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

Medicare specialtyORTHOPEDIC SURGERY
Also practisesSPORTS MEDICINE
Medical schoolINDIANA UNIVERSITY SCHOOL OF MEDICINE
Graduated 2002 (24 years in practice)
Group practice Greene County General Hospital — 98 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount