Samuel Klempner, M.D
NPI 1134329378 · Hematology & Oncology Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Samuel Klempner, M.D is a Hematology & Oncology Physician provider in Los Angeles, CA (NPI 1134329378).
Provider details
- NPI number
- 1134329378
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- No
- License
- 232414 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
925 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 293 | $152 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 264 | $17 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 149 | $124 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 128 | $102 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 34 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 20 | 11 |
| Apixabanbrand: Eliquis | 16 | — |
| Prednisone | 15 | — |
| Dexamethasone | 13 | 11 |
| Prochlorperazine Maleate | 12 | 11 |
| Oxycodone Hcl | 12 | — |
| Ondansetron Hcl | 11 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$28,985 across 16 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 55 Fruit StBoston, MA 02114-2696Phone: (617) 724-7168
- 75 Francis StBoston, MA 02115-6110Phone: (617) 732-5500
Registry dates
- Enumerated
- 2007-07-24
- Last updated
- 2026-02-11
- Certified
- 2026-02-11
Frequently asked questions
- What is Samuel Klempner's NPI number?
- Samuel Klempner's National Provider Identifier (NPI) is 1134329378, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Samuel Klempner's specialty?
- Samuel Klempner is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Samuel Klempner located?
- Samuel Klempner's practice location on file with NPPES is 11800 Wilshire Blvd, Los Angeles, CA 90025-6602.
- What is Samuel Klempner's phone number?
- The practice phone number listed in the NPPES registry for Samuel Klempner is (310) 231-2167.
- Does Samuel Klempner accept Medicare?
- Samuel Klempner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Samuel Klempner's NPI active?
- Yes — Samuel Klempner's NPI (1134329378) is active in the NPPES registry as of the last update on 2026-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.