Quick answers
- Does Mary Shiellah B. James accept Medicare assignment?
- Yes. Medicare's clinician data says Mary Shiellah B. James accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Mary Shiellah B. James's NPI number?
- 1639415979. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mary Shiellah B. James works
Medicare's Facility Affiliation Data lists Mary Shiellah B. James at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Advocate Good Samaritan HospitalDowners Grove, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140288
- Advocate Illinois Masonic Medical CenterChicago, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140182
Practice locations
Addresses where Mary Shiellah B. James is enrolled with Medicare (CMS data updated October 2, 2026).
- 16335 Harlem Ave, Suite 300Tinley Park, IL 60477 (844) 737‑3638
- 3815 Highland AveDowners Grove, IL 60515 (630) 275‑5900
Group practices
Medicare enrollment lists Mary Shiellah B. James as a member of these groups (CMS data updated October 2, 2026).
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
- Serene Health25 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Tinley Park
Clinicians with the same Medicare primary specialty in Tinley Park, IL — not a recommendation.
Other clinicians in Advocate Health and Hospitals Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2012 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639415979 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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