Quick answers
- Which hospitals does Matas Orentas work at?
- Medicare's official clinician data lists Matas Orentas at 4 hospitals: Advocate Sherman Hospital, Northwestern Medicine McHenry, Saint Anthony Medical Center and UW Health. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Matas Orentas see patients?
- Medicare's clinician data lists 2 practice locations, including Elgin, IL and McHenry, IL. Call before your visit to confirm the address.
- What is Matas Orentas's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Matas Orentas accept Medicare assignment?
- Yes. Medicare's clinician data says Matas Orentas accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Matas Orentas?
- (815) 398-9491, as listed in official Medicare / NPI Registry data.
- What is Matas Orentas's NPI number?
- 1396303004. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Matas Orentas works
Medicare's Facility Affiliation Data lists Matas Orentas at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Sherman HospitalElgin, IL · Acute Care Hospital · CCN 140030
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · CCN 140116
- Saint Anthony Medical CenterRockford, IL · Acute Care Hospital · CCN 140233
- UW HealthRockford, IL · Acute Care Hospital · CCN 140228
Practice locations
Addresses where Matas Orentas is enrolled with Medicare (CMS data updated 2026-10-02).
- 1550 N Randall RdElgin, IL 60123 (815) 398‑9491
- 4119 W Shamrock LnMcHenry, IL 60050 (815) 398‑9494
Group practices
Medicare enrollment lists Matas Orentas as a member of this group (CMS data updated 2026-10-02).
- Orthomidwest, PLLC547 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Elgin
Clinicians with the same Medicare primary specialty in Elgin, IL — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1396303004 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians