Samuel Jacob Klempner, M.D
Hematology & Oncology Physician · Los Angeles, CA
Samuel Jacob Klempner, M.D is a hematology & oncology physician with a practice address in Los Angeles, California, and NPI 1134329378, issued on Jul 24, 2007. Check the license (California A125171, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Samuel Jacob Klempner
- Credential
- M.D
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- A125171 CA
232414 MA
243585 MA
Self-reported in NPPES; status is on the state search - Practice location
- 11800 Wilshire Blvd, Los Angeles, CA 90025
- Phone
- (310) 231-2167
- Enumerated
- Jul 24, 2007
- Record last updated
- Feb 11, 2026
- Fax
- (310) 231-2172
- Medicare enrollment
- Enrolled (PECOS I20190513002184); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 2007
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 11800 Wilshire Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tyler Berman, PA-CPhysician Assistant1437869765
- Carey Cullinane, M.D.Surgery Physician1801846548
- Maria Dungo, M.D.Hematology & Oncology Physician1235101874
- Carolyn Goodman, NP-CNurse Practitioner1235647728
- Navid Hafez, M.D.Hematology & Oncology Physician1740505007
- Ronald Hurst, M.D.Surgical Oncology Physician1619069820
Verify Samuel Jacob Klempner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A125171Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
168 Medicare Part D claims for 54 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 21 claims were for opioids.
Most prescribed
- Omeprazole20 claims
- Eliquis16 claims
- Prednisone15 claims
- Dexamethasone13 claims
- Oxycodone Hcl12 claims
- Prochlorperazine Maleate12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $28,985.06
16 payments; by number, the most common kind was consulting fee; the largest payer was Merck Sharp & Dohme LLC. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Massachusetts General Physicians Organization IncBoston, MA
- The General Hospital CorporationBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Samuel Jacob Klempner among 1,583 hematology & oncology physician records in California
Samuel Jacob Klempner, M.D is one of 1,583 hematology & oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 40% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2007 · median 2003 among the 1,124 with a school on file
- Record last updated2026 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Los Angeles → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- VI Chiu, M.D., PH.D.Los Angeles, CA 900251992725865
- Maria Dungo, M.D.Los Angeles, CA 900251235101874
- Navid Hafez, M.D.Los Angeles, CA 900251740505007
- Adrese Kandahari, M.D.Los Angeles, CA 900251134573629
- Inderjit Mehmi, M.D.Los Angeles, CA 900251801092705
- Lauren Midthun, MD, DDSLos Angeles, CA 900251629365176
- Lawrence Piro, M.D.Los Angeles, CA 900251124131446
- Wanxing Chai-Ho, M.D.Los Angeles, CA 900241023371515
Common questions
What is Samuel Jacob Klempner, M.D's NPI number?
Samuel Jacob Klempner, M.D's National Provider Identifier (NPI) is 1134329378, issued on Jul 24, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Samuel Jacob Klempner, M.D located?
The NPPES record lists a practice address at 11800 Wilshire Blvd, Los Angeles, CA, 90025. Phone: (310) 231-2167. Providers update this record themselves, so call before visiting.
How can I verify Samuel Jacob Klempner, M.D's license?
NPPES lists California license number A125171, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Samuel Jacob Klempner, M.D prescribe under Medicare Part D?
In 2024, Samuel Jacob Klempner, M.D had 168 Medicare Part D claims for 54 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.