John Adam Hamilton, MD
Orthopaedic Surgery Physician · Marshalltown, IA
John Adam Hamilton, MD is an orthopaedic surgery physician with a practice address in Marshalltown, Iowa, and NPI 1982720231, issued on Mar 21, 2007. Check the license (Iowa 48358, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- John Adam Hamilton
- Credential
- MD
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License numbers
- 48358 IA
53573 MN
57-012100 OH
69507 WI
Self-reported in NPPES; status is on the state search - Practice location
- 421 E Merle Hibbs Blvd, Marshalltown, IA 50158
- Phone
- (641) 844-2213
- Enumerated
- Mar 21, 2007
- Record last updated
- Jul 17, 2023
- Fax
- (641) 752-5132
- Medicare enrollment
- Enrolled (PECOS I20210406000750); accepts Medicare assignment
- Medical or professional school
- Creighton University School Of Medicine, 2006
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 257 in Iowa → Look up another NPI →
Also registered at 421 E Merle Hibbs Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Melinda Arnold, PAPhysician Assistant1013618701
- Carol Barlow, ARNPNurse Practitioner1225592074
- Matthew Crandon, PTPhysical Therapist1730301375
- Daniel DelaneyFamily Medicine Physician1992360697
- Lynne Desotel, MDFamily Medicine Physician1568545960
- Jeffrey Dikis, DPMFoot & Ankle Surgery Podiatrist1740544386
Verify John Adam Hamilton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 48358Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
51 Medicare Part D claims for 39 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. 35 claims were for opioids.
Most prescribed
- Tramadol Hcl21 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $51.49
3 payments; by number, the most common kind was food and beverage; the largest payer was Illuminoss Medical, Inc. The 15,003 providers of this specialty with any payment received $23,022.89 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
2 hospitals and group practices
- Franklin General HospitalHampton, IA · Critical Access Hospitals
- Mcfarland Clinic PCAmes, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).
John Adam Hamilton among 257 orthopaedic surgery physician records in Iowa
John Adam Hamilton, MD is one of 257 orthopaedic surgery physician records with a practice address in Iowa. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 53% of them.
- NPI issued2007 · 53% of these records are older, 42% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2006 · median 2004 among the 151 with a school on file
- Record last updated2023 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
5 orthopaedic surgery physician records list a practice address in Marshalltown
They are 5 of the 443 NPPES records with a practice address in Marshalltown, and 257 orthopaedic surgery physician records in Iowa.
All 257 in Iowa → Every provider in Marshalltown → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Margaret Fehrle, MDMarshalltown, IA 501581770576043
- Darin Larson, M.D.Marshalltown, IA 501581568842391
- Bradley Lister, MDMarshalltown, IA 501581699768978
- Robert Young, MDMarshalltown, IA 501581932192218
- Jeffrey Wahl, D.O.Jefferson, IA 501291174726962
- Jeffrey Piccirillo, D.O.Grinnell, IA 501121891767257
- Anthony Tedesco, DOGrinnell, IA 501121275940371
- Frank Butera, DONewton, IA 502081699746693
Common questions
What is John Adam Hamilton, MD's NPI number?
John Adam Hamilton, MD's National Provider Identifier (NPI) is 1982720231, issued on Mar 21, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Adam Hamilton, MD located?
The NPPES record lists a practice address at 421 E Merle Hibbs Blvd, Marshalltown, IA, 50158. Phone: (641) 844-2213. Providers update this record themselves, so call before visiting.
How can I verify John Adam Hamilton, MD's license?
NPPES lists Iowa license number 48358, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Adam Hamilton, MD prescribe under Medicare Part D?
In 2024, John Adam Hamilton, MD had 51 Medicare Part D claims for 39 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.