Quick answers
- Which hospitals does Shirley Joo work at?
- Medicare's official clinician data lists Shirley Joo at 2 hospitals: Mercy Hospital South and Mercy Hospital St Louis. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Shirley Joo see patients?
- Medicare's clinician data lists 1 practice location in St Louis, MO. Call before your visit to confirm the address.
- What is Shirley Joo's specialty?
- Medicare lists Allergy/Immunology as the primary specialty, and also Internal Medicine.
- Does Shirley Joo accept Medicare assignment?
- Yes. Medicare's clinician data says Shirley Joo 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.
- Does Shirley Joo offer telehealth?
- Medicare's clinician data says Shirley Joo offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Shirley Joo?
- (314) 251-6382, as listed in official Medicare / NPI Registry data.
- What is Shirley Joo's NPI number?
- 1144262825. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Shirley Joo works
Medicare's Facility Affiliation Data lists Shirley Joo at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital SouthSaint Louis, MO · Acute Care Hospital · CCN 260077
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · CCN 260020
Practice locations
Addresses where Shirley Joo is enrolled with Medicare (CMS data updated 2026-10-02).
- 615 S New Ballas Rd, Mercy Jfk ClinicSt Louis, MO 63141 (314) 251‑6382
Group practices
Medicare enrollment lists Shirley Joo as a member of this group (CMS data updated 2026-10-02).
- Mercy Hospitals East Communities98 clinicians in the group
Specialties
- Allergy/Immunologyprimary
- Internal Medicinealso
Other allergist and immunologists in Missouri
Clinicians with the same Medicare primary specialty in Missouri — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 1999 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1144262825 |
| 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