Samuel Jacob Klempner, MD - Medicare Hematology/oncology in Boston, MA

Samuel Jacob Klempner, MD is a medicare enrolled "Internal Medicine - Hematology & Oncology" physician in Boston, Massachusetts. He went to University Of Massachusetts Medical School and graduated in 2007 and has 19 years of diverse experience with area of expertise as Hematology/oncology. He is a member of the group practice The General Hospital Corporation, Massachusetts General Physicians Organization Inc and his current practice location is 55 Fruit St, Boston, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (617) 724-7168.

Samuel Jacob Klempner is licensed to practice in California (license number A125171) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1134329378.

Contact Information

Samuel Jacob Klempner, MD
55 Fruit St,
Boston, MA 02114-2696
(617) 724-7168
Not Available

Map and Direction




Physician's Profile

Full NameSamuel Jacob Klempner
GenderMale
SpecialityHematology/oncology
Experience19 Years
Location55 Fruit St, Boston, Massachusetts
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Samuel Jacob Klempner attended and graduated from University Of Massachusetts Medical School in 2007
  NPI Data:
  • NPI Number: 1134329378
  • Provider Enumeration Date: 07/24/2007
  • Last Update Date: 08/14/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 7911132048
  • Enrollment ID: I20190513002184

Medical Identifiers

Medical identifiers for Samuel Jacob Klempner such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1134329378NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 232414 (Massachusetts)Secondary
207RH0003XInternal Medicine - Hematology & Oncology A125171 (California)Primary
207RH0000XInternal Medicine - Hematology 243585 (Massachusetts)Secondary
207RX0202XInternal Medicine - Medical Oncology 243585 (Massachusetts)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Mass General Brigham Home Care, IncNewton, MAHome health agency
Massachusetts General HospitalBoston, MAHospital
North Shore Medical Center -Salem, MAHospital
Newton-wellesley HospitalNewton, MAHospital
Brigham And Women's HospitalBoston, MAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
The General Hospital Corporation65078038061275
Massachusetts General Physicians Organization Inc24663658203494

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Samuel Jacob Klempner allows following entities to bill medicare on his behalf.
Entity NameMassachusetts General Physicians Organization Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1801874573
PECOS PAC ID: 2466365820
Enrollment ID: O20031111000434
Entity NameThe General Hospital Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1023049236
PECOS PAC ID: 6507803806
Enrollment ID: O20080313000351
Entity NameBrigham & Womens Physicians Organization Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1033535497
PECOS PAC ID: 3870405988
Enrollment ID: O20150107001260

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Samuel Jacob Klempner is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Samuel Jacob Klempner, MD
6424 Colgate Ave,
Los Angeles, CA 90048-4409

Ph: (508) 954-6022
Samuel Jacob Klempner, MD
55 Fruit St,
Boston, MA 02114-2696

Ph: (617) 724-7168

Reviews and Comments


Internal Medicine Doctors in Boston, MA

Kaitlyn My-tu Lam, MBBS
Hematology & Oncology
Medicare: Not Enrolled in Medicare
Practice Location: Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114
Phone: 617-724-7738    
Kui Toh Gerard Leong, M.D.
Hematology & Oncology
Medicare: Not Enrolled in Medicare
Practice Location: 55 Fruit Street, Massachusetts General Hospital, Boston, MA 02114
Phone: 617-726-8862    
Ruma Rajbhandari,
Hematology & Oncology
Medicare: Accepting Medicare Assignments
Practice Location: 75 Francis St, Boston, MA 02115
Phone: 617-525-6841    
Alaka Ray, M.D.
Hematology & Oncology
Medicare: Accepting Medicare Assignments
Practice Location: Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114
Phone: 617-726-2066    
Meghan E Sise, M.D.
Hematology & Oncology
Medicare: Accepting Medicare Assignments
Practice Location: Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114
Phone: 617-726-2862    
Aaron Dickstein, M.D.
Hematology & Oncology
Medicare: Accepting Medicare Assignments
Practice Location: 800 Washington St, Box 233, Boston, MA 02111
Phone: 617-636-5883    Fax: 617-636-9292
Dr. Felicia Elizabeth Patch, MD
Hematology & Oncology
Medicare: Accepting Medicare Assignments
Practice Location: 801 Massachusetts Ave, Crosstown 2, Boston, MA 02118
Phone: 617-414-4376    Fax: 617-414-4676

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.