Quick answers
- Does Catherine H. Horwitz accept Medicare assignment?
- Yes. Medicare's clinician data says Catherine H. Horwitz 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.
- How many Medicare patients does Catherine H. Horwitz see?
- In 2024, CMS data shows 576 Original Medicare patients and 611 services for Catherine H. Horwitz. This counts Original Medicare only and measures volume, not quality.
- What is Catherine H. Horwitz's NPI number?
- 1073713632. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Catherine H. Horwitz, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 576 |
|---|---|
| Services billed to Medicare | 611 |
| Different services or procedures | 23 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Emergency department visit with high level of medical decision making (99285)388 services
- Emergency department visit with moderate level of medical decision making (99284)147 services
- Emergency department visit with low level of medical decision making (99283)28 services
- Critical care, first 30-74 minutes (99291)23 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol74%
- Arthritis60%
- Anxiety44%
- Depression42%
- Ischemic heart disease39%
Hospitals where Catherine H. Horwitz works
Medicare's Facility Affiliation Data lists Catherine H. Horwitz 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.
- Emerson Hospital -W Concord, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220084
- Metrowest Medical CenterFramingham, MA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 220175
- Newton-Wellesley HospitalNewton, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220101
- South Shore HospitalSouth Weymouth, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220100
Practice locations
Addresses where Catherine H. Horwitz is enrolled with Medicare (CMS data updated October 2, 2026).
- 115 Lincoln StFramingham, MA 01702 (508) 383‑1000
- 123 Summer StWorcester, MA 01608 (508) 363‑5000
- 133 Old Rd To 9 Acre CorConcord, MA 01742 (978) 287‑3694
- 55 Fogg RdWeymouth, MA 02190 (781) 792‑4136
Group practices
Medicare enrollment lists Catherine H. Horwitz as a member of these groups (CMS data updated October 2, 2026).
- Coastal Medical Associates443 clinicians in the group
- Emergency Physician Associates of Massachusetts PC46 clinicians in the group
- Emerson Emergency Physicians LLC6 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Framingham
Clinicians with the same Medicare primary specialty in Framingham, MA — not a recommendation.
Other clinicians in Coastal Medical Associates
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tufts University School Of Medicine |
| Graduation year | 2004 (22 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1073713632 |
| 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
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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