Gregory C. Castello, D.O.
Family Medicine Physician · Lombard, IL
Gregory C. Castello, D.O. is a family medicine physician with a practice address in Lombard, Illinois, and NPI 1417939323, issued on Nov 16, 2005. Check the license (Illinois 036091537, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Gregory C. Castello
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 036091537 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2 E 22ND St Ste 217, Lombard, IL 60148
- Phone
- (630) 620-9500
- Enumerated
- Nov 16, 2005
- Record last updated
- Jan 28, 2026
- Fax
- (630) 620-6541
- Medicare enrollment
- Enrolled (PECOS I20050914001182); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,215 in Illinois → Look up another NPI →
Verify Gregory C. Castello 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 036091537Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average family medicine physician in 2024
1,321 Medicare Part D claims for 122 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium140 claims
- Losartan Potassium89 claims
- Levothyroxine Sodium77 claims
- Atorvastatin Calcium75 claims
- Sertraline Hcl44 claims
- Lisinopril43 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 MIPS final score for 2023 (Medicare payment program): 12.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $788.64
40 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, 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.
Gregory C. Castello among 6,215 family medicine physician records in Illinois
Gregory C. Castello, D.O. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1993 · median 2006 among the 3,714 with a school on file
- Record last updated2026 · 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).
21 family medicine physician records list a practice address in Lombard
They are 21 of the 1,347 NPPES records with a practice address in Lombard, and 6,215 family medicine physician records in Illinois.
All 6,215 in Illinois → Every provider in Lombard → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Kaniz Bhuiyan, M.DLombard, IL 601481427276880
- David Cespedes, DOLombard, IL 601481699775650
- Sheri Evans, DOLombard, IL 601481831140789
- Charles Friedl, D.O.Lombard, IL 601481003945320
- J Graziano, M.D.Lombard, IL 601481730373747
- Gartrell King, M.D.Lombard, IL 601481962449140
- Jesse Kulig, DOLombard, IL 601481891902151
- Kathleen Mahan, MDLombard, IL 601481639100464
Common questions
What is Gregory C. Castello, D.O.'s NPI number?
Gregory C. Castello, D.O.'s National Provider Identifier (NPI) is 1417939323, issued on Nov 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gregory C. Castello, D.O. located?
The NPPES record lists a practice address at 2 E 22ND St Ste 217, Lombard, IL, 60148. Phone: (630) 620-9500. Providers update this record themselves, so call before visiting.
How can I verify Gregory C. Castello, D.O.'s license?
NPPES lists Illinois license number 036091537, 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 Gregory C. Castello, D.O. prescribe under Medicare Part D?
In 2024, Gregory C. Castello, D.O. had 1,321 Medicare Part D claims for 122 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Gregory C. Castello, D.O.'s MIPS final score?
The 2023 MIPS final score is 12.2 of 100. 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.