Arturo D. Castro Diaz, MD
Internal Medicine Physician · Bloomington, IN
Arturo D. Castro Diaz, MD is an internal medicine physician with a practice address in Bloomington, Indiana, and NPI 1538621842, issued on Apr 4, 2019. Check the license (Indiana 01088753A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Arturo D. Castro Diaz
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 01088753A IN
Self-reported in NPPES; status is on the state search - Practice location
- 2651 E Discovery Pkwy, Bloomington, IN 47408
- Phone
- (812) 676-4102
- Enumerated
- Apr 4, 2019
- Record last updated
- Oct 28, 2022
- Fax
- (812) 676-4106
- Medicare enrollment
- Enrolled (PECOS I20221102000648); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,109 in Indiana → Look up another NPI →
Also registered at 2651 E Discovery Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Arturo D. Castro Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01088753ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average internal medicine physician in 2024
344 Medicare Part D claims for 119 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 28 claims were for opioids.
Most prescribed
- Pantoprazole Sodium35 claims
- Amoxicillin-Clavulanate Potass21 claims
- Atorvastatin Calcium21 claims
- Oxycodone Hcl14 claims
- Prednisone14 claims
- Cefpodoxime Proxetil12 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.
Bills Medicare through 2 group practices
- Indiana University Health Southern Indiana Physicians LLCBloomington, IN
- IU Health Medical Group LLCIndianapolis, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Arturo D. Castro Diaz among 2,109 internal medicine physician records in Indiana
Arturo D. Castro Diaz, MD is one of 2,109 internal medicine physician records with a practice address in Indiana. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 83% of them.
- NPI issued2019 · 83% of these records are older, 13% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2018 · median 2005 among the 1,448 with a school on file
- Record last updated2022 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
52 internal medicine physician records list a practice address in Bloomington
They are 52 of the 3,287 NPPES records with a practice address in Bloomington, and 2,109 internal medicine physician records in Indiana.
All 2,109 in Indiana → Every provider in Bloomington → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Bernard Hardy, MDBloomington, IN 474081033612528
- David Montgomery, MDBloomington, IN 474081386106250
- Ashwin Narasimhan, M.D.Bloomington, IN 474081548241912
- Ramesh Prajapati, MDBloomington, IN 474081245661859
- Andrew Seier, MDBloomington, IN 474081528529807
Common questions
What is Arturo D. Castro Diaz, MD's NPI number?
Arturo D. Castro Diaz, MD's National Provider Identifier (NPI) is 1538621842, issued on Apr 4, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Arturo D. Castro Diaz, MD located?
The NPPES record lists a practice address at 2651 E Discovery Pkwy, Bloomington, IN, 47408. Phone: (812) 676-4102. Providers update this record themselves, so call before visiting.
How can I verify Arturo D. Castro Diaz, MD's license?
NPPES lists Indiana license number 01088753A, 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 Arturo D. Castro Diaz, MD prescribe under Medicare Part D?
In 2024, Arturo D. Castro Diaz, MD had 344 Medicare Part D claims for 119 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.