John P. Hammerstein, M.D.
Orthopaedic Surgery Physician · Linton, IN
John P. Hammerstein, M.D. is an orthopaedic surgery physician with a practice address in Linton, Indiana, and NPI 1265573307, issued on Feb 10, 2007. Check the license (Indiana 01065333A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- John P. Hammerstein
- Credential
- M.D.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- 01065333A IN
Self-reported in NPPES; status is on the state search - Practice location
- 1043 N 1000 W, Linton, IN 47441
- Phone
- (812) 847-3381
- Enumerated
- Feb 10, 2007
- Record last updated
- May 5, 2023
- Medicaid ID
- 200906320 IN
- Medicare enrollment
- Enrolled (PECOS I20080804000100); accepts Medicare assignment
- Medical or professional school
- Indiana University School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 491 in Indiana → Look up another NPI →
Also registered at 1043 N 1000 W
A shared address usually means a shared clinic or building; it does not show who employs whom.
- S. Gabrielsen, M.D.Surgery Physician1942324157
- Carol Miller, NPAdult Health Nurse Practitioner1568674455
- Krista Sexton-Cox, D.O.Family Medicine Physician1326142696
Verify John P. Hammerstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01065333ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
88 Medicare Part D claims for 56 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 42 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen41 claims
- Methylprednisolone26 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: $18.25
1 payment: food and beverage; the largest payer was Smith+Nephew, 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.
One hospital affiliation
- Greene County General HospitalLinton, IN · Critical Access Hospitals4 of 5 stars
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). Star ratings are CMS hospital ratings, not ratings of this provider.
John P. Hammerstein among 491 orthopaedic surgery physician records in Indiana
John P. Hammerstein, M.D. is one of 491 orthopaedic surgery physician records with a practice address in Indiana. 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 55% of them.
- NPI issued2007 · 55% of these records are older, 35% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2002 · median 2004 among the 314 with a school on file
- Record last updated2023 · 47% 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 Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in Indiana
There are 491 orthopaedic surgery physician records in Indiana.
All 491 in Indiana → Every provider in Linton → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- James Rickert, M.D.Bedford, IN 474211659375624
- Sterling Doster, M.D.Bloomington, IN 474031801948211
- David Licini, MDBloomington, IN 474031801086343
- Cody Bellard, M.D.Bloomington, IN 474011437353349
- Brandon Hood, MDBloomington, IN 474011053759092
- James Lindner, MDBloomington, IN 474011760607253
- Aaron Mast, MDBloomington, IN 474011831159805
- Tarek SibaiBloomington, IN 474011932364288
Common questions
What is John P. Hammerstein, M.D.'s NPI number?
John P. Hammerstein, M.D.'s National Provider Identifier (NPI) is 1265573307, issued on Feb 10, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John P. Hammerstein, M.D. located?
The NPPES record lists a practice address at 1043 N 1000 W, Linton, IN, 47441. Phone: (812) 847-3381. Providers update this record themselves, so call before visiting.
How can I verify John P. Hammerstein, M.D.'s license?
NPPES lists Indiana license number 01065333A, as entered by the provider. Search the Medical Licensing Board of Indiana at https://www.in.gov/pla/professions/physicians-home/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John P. Hammerstein, M.D. prescribe under Medicare Part D?
In 2024, John P. Hammerstein, M.D. had 88 Medicare Part D claims for 56 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.