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

Dr. John Adam Hamilton, MD

Individual provider Orthopaedic Surgery Physician · NPI 1982720231

Dr. John Adam Hamilton, MD is an Orthopedic Surgery in Marshalltown, Iowa. Graduated from Creighton University School of Medicine in 2006, 20 years ago. Practices with McFarland Clinic PC, a 353-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Iowa, Minnesota, Ohio and Wisconsin.

Years since qualifying
20
Trained at
Creighton University School of Medicine
Licensed in
IA, MN, OH, WI
In the registry since
2007
Specialties on file
4
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

421 E Merle Hibbs Blvd
Marshalltown, IA 50158-1992
Phone: (641) 844-2213
Fax: (641) 752-5132
Show map & directions

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

Additional practice locations (3)

  • 1233 34th St Nw, Bemidji, MN 56601 — (218) 333-5000
  • 1233 34th St Nw, Bemidji, MN 56601 — (218) 333-5000
  • 501 N 10th St, Manitowoc, WI 54220 — (920) 682-6376

Specialties & licences

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence 48358 (IA)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence 53573 (MN)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence 57-012100 (OH)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence 69507 (WI)

Record details

NPI number1982720231
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 21, 2007
Last updated in NPPESJuly 17, 2023
Certification dateJuly 12, 2023

Medicare enrollment

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

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolCREIGHTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2006 (20 years in practice)
Group practice McFarland Clinic Pc — 353 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

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