Oscar Castro, MD
Family Medicine Physician · Grayslake, IL
Oscar Castro, MD is a family medicine physician with a practice address in Grayslake, Illinois, and NPI 1043070113, issued on Mar 19, 2024. Check the license (Illinois 125.083439, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Oscar Castro
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 125.083439 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1475 E Belvidere RD Unit 385, Grayslake, IL 60030
- Phone
- (847) 535-7157
- Enumerated
- Mar 19, 2024
- Record last updated
- May 28, 2024
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,215 in Illinois → Look up another NPI →
Also registered at 1475 E Belvidere RD Unit 385
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Zaynah AhmedStudent in an Organized Health Care Education/Training Program1194527044
- Rachel Bernardo, DOFamily Medicine Physician1104528306
- Jennifer Castillo SuchkouFamily Medicine Physician1558117499
- Richard Clark, M.D.Family Medicine Physician1023042470
- Jeriann Collymore, MD, MPHFamily Medicine Physician1992400329
Verify Oscar Castro 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 125.083439Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average family medicine physician in 2024
23 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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: $9.15
1 payment: food and beverage; the largest payer was Organon Llc. The 55,478 providers of this specialty with any payment received $902.55 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.
Oscar Castro among 6,215 family medicine physician records in Illinois
Oscar Castro, MD is one of 6,215 family medicine physician records with a practice address in Illinois. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2024, is newer than 94% of them.
- NPI issued2024 · 94% of these records are older, 4% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2024 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
37 family medicine physician records list a practice address in Grayslake
They are 37 of the 572 NPPES records with a practice address in Grayslake, and 6,215 family medicine physician records in Illinois.
All 6,215 in Illinois → Every provider in Grayslake → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Richard Clark, M.D.Grayslake, IL 600301023042470
- Deborah Clements, M.D.Grayslake, IL 600301255427779
- Kent Kamradt, M.D.Grayslake, IL 600301598768939
- Adiba KhanGrayslake, IL 600301053842039
- Bryan KillianGrayslake, IL 600301336670181
- James Kim, MDGrayslake, IL 600301891890695
- Sarah Kim, MDGrayslake, IL 600301962562835
- Michael Kraft, MDGrayslake, IL 600301144725987
Common questions
What is Oscar Castro, MD's NPI number?
Oscar Castro, MD's National Provider Identifier (NPI) is 1043070113, issued on Mar 19, 2024. An NPI identifies a provider in billing; it is not a license.
Where is Oscar Castro, MD located?
The NPPES record lists a practice address at 1475 E Belvidere RD Unit 385, Grayslake, IL, 60030. Phone: (847) 535-7157. Providers update this record themselves, so call before visiting.
How can I verify Oscar Castro, MD's license?
NPPES lists Illinois license number 125.083439, 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 Oscar Castro, MD prescribe under Medicare Part D?
In 2024, Oscar Castro, MD had 23 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. 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.