Roman Kleynberg, M.D.
NPI 1700103298 · Hematology & Oncology Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Roman Kleynberg, M.D. is a Hematology & Oncology Physician provider in Los Angeles, CA (NPI 1700103298).
Provider details
- NPI number
- 1700103298
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A120343 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
16 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
15,000 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 9,156 | $78 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 3,755 | $117 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 1,071 | $128 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 1,018 | $171 |
Typical Medicare-allowed amounts for these services range $78–$171 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 62 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 237 | 41 |
| Amlodipine Besylate | 127 | 25 |
| Metformin Hcl | 96 | 20 |
| Semaglutidebrand: Ozempic | 90 | 13 |
| Pantoprazole Sodium | 87 | 28 |
| Levothyroxine Sodium | 76 | 16 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$675 across 30 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
Registry dates
- Enumerated
- 2010-04-23
- Last updated
- 2017-01-27
Frequently asked questions
- What is Roman Kleynberg's NPI number?
- Roman Kleynberg's National Provider Identifier (NPI) is 1700103298, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Roman Kleynberg's specialty?
- Roman Kleynberg is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Roman Kleynberg located?
- Roman Kleynberg's practice location on file with NPPES is 6221 Wilshire Blvd, Los Angeles, CA 90048-5201.
- What is Roman Kleynberg's phone number?
- The practice phone number listed in the NPPES registry for Roman Kleynberg is (323) 965-5679.
- Does Roman Kleynberg accept Medicare?
- Roman Kleynberg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Roman Kleynberg's NPI active?
- Yes — Roman Kleynberg's NPI (1700103298) is active in the NPPES registry as of the last update on 2017-01-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.