Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Catherine M. Matthys, MD

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1104244656

Catherine M. Matthys, MD practises Internal Medicine in Mission Hills, California. Qualified in 2014, 12 years ago. Practices with Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc, a 1,676-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
12
Licensed in
CA
In the registry since
2014
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

Student / training record This NPI belongs to someone enrolled in a health care training programme. It carries no licence and no practice of its own, so no address or phone number is published for it.

Mission Hills, CA

No coordinates on file. Search this address in Google Maps

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A139337 (CA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1104244656
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 2, 2014
Last updated in NPPESSeptember 6, 2017

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc — 1676 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients357
Services billed 676 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1676 clinicians in the practice; 12 are shown here.

Other providers in Mission Hills