Douglas Aaron Rex, D.O.,
Surgery Physician · Marion, IN
Douglas Aaron Rex, D.O., is a surgery physician with a practice address in Marion, Indiana, and NPI 1912185661, issued on Feb 5, 2008. Check the license (Indiana 02003334B, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Douglas Aaron Rex
- Credential
- D.O.,
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- 02003334B IN
Self-reported in NPPES; status is on the state search - Practice location
- 330 N Wabash Ave, Marion, IN 46952
- Phone
- (765) 660-7500
- Enumerated
- Feb 5, 2008
- Record last updated
- Oct 20, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (765) 662-3411
- Medicaid ID
- 200916470 IN
- Medicare enrollment
- Enrolled (PECOS I20080903000248); accepts Medicare assignment
- Medical or professional school
- University Of Pikeville, Kentucky College Of Osteopathic Med, 2003
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 612 in Indiana → Look up another NPI →
Also registered at 330 N Wabash Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Bradford Bichey, MDSpecialist1558372383
- Susan Draves, NPFamily Nurse Practitioner1831170505
- Pierre Fisher, MDSpecialist1447404074
- George Geier, M.D.Urology Physician1679554646
- Kristine Hess, MDDermatology Physician1174525356
Verify Douglas Aaron Rex in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 02003334BCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.3 times the Medicare Part D claims of the average surgery physician in 2024
334 Medicare Part D claims for 185 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims. 81 claims were for opioids.
Most prescribed
- Sucralfate68 claims
- Sutab48 claims
- Hydrocodone-Acetaminophen39 claims
- Metoclopramide Hcl28 claims
- Tramadol Hcl28 claims
- Sulfamethoxazole-Trimethoprim20 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 83.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $23.24
1 payment: food and beverage; the largest payer was Sirius Medical Systems. The 17,103 providers of this specialty with any payment received $3,513.80 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
- Marion General HospitalMarion, IN · Acute Care Hospitals3 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.
Douglas Aaron Rex among 612 surgery physician records in Indiana
Douglas Aaron Rex, D.O., is one of 612 surgery physician records with a practice address in Indiana. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 57% of them.
- NPI issued2008 · 57% of these records are older, 36% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2003 · median 2004 among the 408 with a school on file
- Record last updated2020 · 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 208600000X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in Indiana
There are 612 surgery physician records in Indiana.
All 612 in Indiana → Every provider in Marion → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Megan Denny, DOMarion, IN 469521891315776
- Stephen DerryberryMarion, IN 469521588161814
- Michael Gunter, M.D.Marion, IN 469521285636415
- Edward Keppler, M.D.Marion, IN 469521104828334
- Jeffrey Miller, D.O.Marion, IN 469521285682625
- Tamy Perng, D.O.Marion, IN 469521063628956
- David Roe, M.D.Marion, IN 469521275565897
- Nitin Sharma, M.DMarion, IN 469521548460553
Common questions
What is Douglas Aaron Rex, D.O.,'s NPI number?
Douglas Aaron Rex, D.O.,'s National Provider Identifier (NPI) is 1912185661, issued on Feb 5, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Douglas Aaron Rex, D.O., located?
The NPPES record lists a practice address at 330 N Wabash Ave, Marion, IN, 46952. Phone: (765) 660-7500. Providers update this record themselves, so call before visiting.
How can I verify Douglas Aaron Rex, D.O.,'s license?
NPPES lists Indiana license number 02003334B, 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 Douglas Aaron Rex, D.O., prescribe under Medicare Part D?
In 2024, Douglas Aaron Rex, D.O., had 334 Medicare Part D claims for 185 beneficiaries; the average among surgery physician prescribers was 147. Part D covers Medicare prescriptions only.
What is Douglas Aaron Rex, D.O.,'s MIPS final score?
The 2023 MIPS final score is 83.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.