Samuel Castillo, M.D.
Gastroenterology Physician · Chicago, IL
Samuel Castillo, M.D. is a gastroenterology physician with a practice address in Chicago, Illinois, and NPI 1467503672, issued on Jan 15, 2007. Check the license (Illinois 036063975, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Samuel Castillo
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 036063975 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2222 W Division St, Chicago, IL 60622
- Phone
- (773) 342-6800
- Enumerated
- Jan 15, 2007
- Record last updated
- Nov 23, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (773) 342-6332
- Medicaid ID
- 036063975 IL
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 887 in Illinois → Look up another NPI →
Also registered at 2222 W Division St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Samuel Castillo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036063975Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average gastroenterology physician in 2024
70 Medicare Part D claims for 25 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of claims.
Most prescribed
- Omeprazole17 claims
- Pantoprazole Sodium16 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: $96.37
4 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 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.
Samuel Castillo among 887 gastroenterology physician records in Illinois
Samuel Castillo, M.D. is one of 887 gastroenterology physician records with a practice address in Illinois. 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 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 45% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2015 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Illinois
There are 887 gastroenterology physician records in Illinois.
All 887 in Illinois → Every provider in Chicago → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Samuel Castillo, M.D.Chicago, IL 606221205801313
- David Jarava, M.D.Chicago, IL 606221295261253
- Arun Verma, M.D.Chicago, IL 606221871589143
- Thomas Cullins, M.D.Chicago, IL 606191295765485
- Nolan Faust, MDChicago, IL 606251124511555
- Aava Khatiwada, MDChicago, IL 606251073033353
- Anthony Merza, M.D.Chicago, IL 606251780709337
- Sriya Muralidharan, MDChicago, IL 606251174085179
Common questions
What is Samuel Castillo, M.D.'s NPI number?
Samuel Castillo, M.D.'s National Provider Identifier (NPI) is 1467503672, issued on Jan 15, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Samuel Castillo, M.D. located?
The NPPES record lists a practice address at 2222 W Division St, Chicago, IL, 60622. Phone: (773) 342-6800. Providers update this record themselves, so call before visiting.
How can I verify Samuel Castillo, M.D.'s license?
NPPES lists Illinois license number 036063975, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Samuel Castillo, M.D. prescribe under Medicare Part D?
In 2024, Samuel Castillo, M.D. had 70 Medicare Part D claims for 25 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.