Quick answers
- Which hospitals does Catherine S. Yu work at?
- Medicare's official clinician data lists Catherine S. Yu at 2 hospitals: Lowell General Hospital and Massachusetts General Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Catherine S. Yu see patients?
- Medicare's clinician data lists 1 practice location in Lowell, MA. Call before your visit to confirm the address.
- What is Catherine S. Yu's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Catherine S. Yu accept Medicare assignment?
- Yes. Medicare's clinician data says Catherine S. Yu 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 Catherine S. Yu?
- (978) 937-9700, as listed in official Medicare / NPI Registry data.
- What is Catherine S. Yu's NPI number?
- 1548228455. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Catherine S. Yu works
Medicare's Facility Affiliation Data lists Catherine S. Yu at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Lowell General HospitalLowell, MA · Acute Care Hospital · CCN 220063
- Massachusetts General HospitalBoston, MA · Acute Care Hospital · CCN 220071
Practice locations
Addresses where Catherine S. Yu is enrolled with Medicare (CMS data updated 2026-10-02).
- 161 Jackson StLowell, MA 01852 (978) 937‑9700
Group practices
Medicare enrollment lists Catherine S. Yu as a member of this group (CMS data updated 2026-10-02).
- Lowell Community Health Center, Inc.86 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Lowell
Clinicians with the same Medicare primary specialty in Lowell, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Massachusetts Medical School |
| Graduation year | 2005 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548228455 |
| 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