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

Dr. John Moritz Wiemann IV, MD

Individual provider Pediatric Orthopaedic Surgery Physician · NPI 1730228768

Dr. John Moritz Wiemann IV, MD is an Orthopedic Surgery in Hollister, California. Graduated from University of California, San Diego School of Medicine in 2006, 20 years ago. Practices with Hazel Hawkins Memorial Hospital, a 53-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
20
Trained at
University of California, San Diego School of Medicine
Licensed in
CA
In the registry since
2007
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

930 Sunnyslope Rd Ste C4
Hollister, CA 95023-5617
Phone: (831) 636-7950
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 A140151 (CA)
Pediatric Orthopaedic Surgery Physician Taxonomy 207XP3100X · Licence A140151 (CA)

Record details

NPI number1730228768
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedFebruary 6, 2007
Last updated in NPPESApril 30, 2026
Certification dateApril 30, 2026

Medicare enrollment

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

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolUNIVERSITY OF CALIFORNIA, SAN DIEGO SCHOOL OF MEDICINE
Graduated 2006 (20 years in practice)
Group practice Hazel Hawkins Memorial Hospital — 53 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount