Jacek Grela M.D., S.c.
NPI 1366568297 · Internal Medicine Physician · Lemont, IL
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jacek Grela M.D., S.c. is a Internal Medicine Physician organization in Lemont, IL (NPI 1366568297).
Provider details
- NPI number
- 1366568297
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Jacek Grela, Physician(708) 415-2959
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-22
- Last updated
- 2020-08-22
Frequently asked questions
- What is Jacek Grela M.D., S.c.'s NPI number?
- Jacek Grela M.D., S.c.'s National Provider Identifier (NPI) is 1366568297, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Jacek Grela M.D., S.c.?
- Jacek Grela M.D., S.c. is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jacek Grela M.D., S.c. located?
- Jacek Grela M.D., S.c.'s practice location on file with NPPES is 1011 State St, Lemont, IL 60439-4768.
- What is Jacek Grela M.D., S.c.'s phone number?
- The practice phone number listed in the NPPES registry for Jacek Grela M.D., S.c. is (630) 754-0141.
- Does Jacek Grela M.D., S.c. accept Medicare?
- Jacek Grela M.D., S.c. is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Jacek Grela M.D., S.c.?
- The authorized official listed on Jacek Grela M.D., S.c.'s NPPES record is Jacek Grela, Physician. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Jacek Grela M.D., S.c.'s NPI active?
- Yes — Jacek Grela M.D., S.c.'s NPI (1366568297) is active in the NPPES registry as of the last update on 2020-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.