Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Joseph Martin Litwak, MD

Individual provider Hospitalist Physician · NPI 1396792958

Dr. Joseph Martin Litwak, MD practises Internal Medicine in Oak Bluffs, Massachusetts. Qualified in 1992, 34 years ago. Practices with Upper Connecticut Valley Hospital Association, an 8-clinician group and accepts Medicare assignment. Licensed in North Carolina and New Hampshire.

Years since qualifying
34
Licensed in
NC, NH
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1 Hospital Rd
Oak Bluffs, MA 02557-1406
Phone: (603) 502-4144
Fax: (413) 200-3251
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 14515 (NH)
Hospitalist Physician Taxonomy 208M00000X · Licence 9700642 (NC)

Record details

NPI number1396792958
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 28, 2006
Last updated in NPPESNovember 23, 2020
Certification dateNovember 23, 2020

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1992 (34 years in practice)
Group practice Upper Connecticut Valley Hospital Association — 8 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 patients19
Services billed 62 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.

Also affiliated with 1 long-term care hospital, which CMS identifies by certification number only.

Colleagues at Upper Connecticut Valley Hospital Association

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 8 clinicians in the practice; 3 are shown here.

Other providers in Oak Bluffs