Quick answers
- Which hospitals does Matthew Horn work at?
- Medicare's official clinician data lists Matthew Horn at 1 hospital: Contra Costa Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Matthew Horn see patients?
- Medicare's clinician data lists 1 practice location in Escondido, CA. Call before your visit to confirm the address.
- What is Matthew Horn's specialty?
- Medicare lists Pulmonary Disease as the primary specialty, and also Internal Medicine.
- Does Matthew Horn accept Medicare assignment?
- Yes. Medicare's clinician data says Matthew Horn 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 Matthew Horn?
- (858) 675-3100, as listed in official Medicare / NPI Registry data.
- What is Matthew Horn's NPI number?
- 1912015637. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Matthew Horn works
Medicare's Facility Affiliation Data lists Matthew Horn at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Contra Costa Regional Medical CenterMartinez, CA · Acute Care Hospital · CCN 050276
Practice locations
Addresses where Matthew Horn is enrolled with Medicare (CMS data updated 2026-10-02).
- 2125 Citracado PkwyEscondido, CA 92029 (858) 675‑3100
Group practices
Medicare enrollment lists Matthew Horn as a member of this group (CMS data updated 2026-10-02).
- Arch Health Partners Inc145 clinicians in the group
Specialties
- Pulmonary Diseaseprimary
- Internal Medicinealso
Other pulmonologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York University School Of Medicine |
| Graduation year | 1977 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1912015637 |
| 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