Jacek Grela, M.D.
Internal Medicine Physician · Lemont, IL
Jacek Grela, M.D. is an internal medicine physician with a practice address in Lemont, Illinois, and NPI 1700850625, issued on Feb 15, 2006. Check the license (Illinois 036098225, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Jacek Grela
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 036098225 IL
036-098225 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1011 State St, Lemont, IL 60439
- Phone
- (630) 754-0141
- Enumerated
- Feb 15, 2006
- Record last updated
- Jun 4, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicaid ID
- 036098225 IL
- Medicare enrollment
- Enrolled (PECOS I20060127000141); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 1011 State St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jacek Grela 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 036098225Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average internal medicine physician in 2024
6,890 Medicare Part D claims for 649 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 64 claims were for opioids.
Most prescribed
- Atorvastatin Calcium345 claims
- Amlodipine Besylate340 claims
- Rosuvastatin Calcium289 claims
- Pantoprazole Sodium220 claims
- Metformin Hcl216 claims
- Levothyroxine Sodium214 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: $1,883.85
83 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Jacek Grela among 7,238 internal medicine physician records in Illinois
Jacek Grela, M.D. is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 61% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1992 · median 2003 among the 3,580 with a school on file
- Record last updated2009 · 47% 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 Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
6 internal medicine physician records list a practice address in Lemont
They are 6 of the 270 NPPES records with a practice address in Lemont, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Lemont → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Catherine Baker, MDLemont, IL 604391871609354
- Ilah Heller-Bair, MDLemont, IL 604391336206150
- Teresa Olivares, M.D.Lemont, IL 604391700057015
- Reshma Relwani, DOLemont, IL 604391053554071
- Jeffrey Sam, DOLemont, IL 604391912588138
- Shiping Bao, M.D.Lansing, IL 604381376724401
- Ramadevi Davarapalli, MDBolingbrook, IL 604401831171750
- Nanette Fabi, M.D.Lansing, IL 604381548269228
Common questions
What is Jacek Grela, M.D.'s NPI number?
Jacek Grela, M.D.'s National Provider Identifier (NPI) is 1700850625, issued on Feb 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jacek Grela, M.D. located?
The NPPES record lists a practice address at 1011 State St, Lemont, IL, 60439. Phone: (630) 754-0141. Providers update this record themselves, so call before visiting.
How can I verify Jacek Grela, M.D.'s license?
NPPES lists Illinois license number 036098225, 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 Jacek Grela, M.D. prescribe under Medicare Part D?
In 2024, Jacek Grela, M.D. had 6,890 Medicare Part D claims for 649 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.