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

Samuel Jacob Klempner, MD

Individual provider Internal Medicine Physician · NPI 1134329378

Samuel Jacob Klempner, MD is a Hematology/Oncology in Los Angeles, California. Graduated from University of Massachusetts Medical School in 2007, 19 years ago. Practices with The General Hospital Corporation, a 1,276-clinician group, works from 3 locations, accepts Medicare assignment and offers telehealth. Licensed in California and Massachusetts.

Years since qualifying
19
Trained at
University of Massachusetts Medical School
Licensed in
CA, MA
In the registry since
2007
Specialties on file
3
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

11800 Wilshire Blvd
Los Angeles, CA 90025-6602
Phone: (310) 231-2167
Fax: (310) 231-2172
Show map & directions

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

Additional practice locations (2)

  • 55 Fruit St, Boston, MA 02114-2696 — (617) 724-7168
  • 75 Francis St, Boston, MA 02115-6110 — (617) 732-5500

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence A125171 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 232414 (MA)
Medical Oncology Physician Taxonomy 207RX0202X · Licence 243585 (MA)

Record details

NPI number1134329378
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 24, 2007
Last updated in NPPESFebruary 11, 2026
Certification dateFebruary 11, 2026

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL
Graduated 2007 (19 years in practice)
Group practice The General Hospital Corporation — 1276 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

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