Samuel Jacob Klempner, M.D
Hematology/Oncology · Internal Medicine (CMS) · Boston, MA
At a glance
55 Fruit St, Boston, MA 02114-2696
NPPES record updated Aug 14, 2026. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
55 Fruit StBoston, MA 02114-2696
Additional reported practice locations
11800 Wilshire BlvdLos Angeles, CA 900256602
Phone: 3102312167
Fax: 3102312172 75 Francis St
Boston, MA 021156110
Phone: 6177325500
Education & affiliations
- Medical / professional school
- University Of Massachusetts Medical School
- Graduation year
- 2007
- CMS specialties
- Hematology/Oncology · Internal Medicine
CMS reports telehealth services for this clinician. Confirm current services and availability with the practice.
Practice groups
Reported hospital affiliations
- Brigham And Women's Hospital Boston, MA
- Cooley Dickinson Hospital Inc,The Northampton, MA
- Massachusetts General Hospital Boston, MA
- Newton-Wellesley Hospital Newton, MA
- North Shore Medical Center - Salem, MA
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Consulting fee | $33,006.40 |
| Food and beverage | $577.29 |
| Travel and lodging | $492.40 |
Reporting companies
| Company | Amount |
|---|---|
| ASTRAZENECA UK LIMITED | $13,198.39 |
| ASTRAZENECA PHARMACEUTICALS LP | $10,929.99 |
| ASTELLAS PHARMA EUROPE LTD | $5,989.15 |
| GILEAD SCIENCES, INC. | $2,985.82 |
| JAZZ PHARMACEUTICALS INC. | $837.00 |
| AMGEN INC. | $106.47 |
| BEONE MEDICINES USA, INC. | $29.27 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Hematology/Oncology · Internal Medicine (CMS)
- Taxonomy code
- 207RH0003X
- Enumeration date
- Jul 24, 2007
- Record updated
- Aug 14, 2026
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- M.D
Reported taxonomies and licenses
207R00000X
License reported: 232414 MA
207RH0003X · Primary
License reported: A125171 CA
207RH0000X
License reported: 243585 MA
207RX0202X
License reported: 243585 MA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
55 Fruit StBoston, MA 02114-2696
- Phone
- (617) 724-7168
Mailing address
6424 COLGATE AVELOS ANGELES, CA 900484409
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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