Boris Ratiner, M.D.
NPI 1821001496 · Rheumatology Physician · Tarzana, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Boris Ratiner, M.D. is a Rheumatology Physician provider in Tarzana, CA (NPI 1821001496).
Provider details
- NPI number
- 1821001496
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A60202 (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
19 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
27,113 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,615 | $147 |
| Measurement of Antibody for Assessment of Autoimmune Disorder, Any Method86235 | 1,540 | $18 |
| 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 | 891 | $18 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 816 | $9 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 783 | $18 |
| Blood Creatinine Level82565 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 46 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methotrexate Sodiumbrand: Methotrexate | 227 | 55 |
| Prednisone | 172 | 55 |
| Hydroxychloroquine Sulfate | 117 | 36 |
| Leflunomide | 113 | 28 |
| Celecoxib | 97 | 25 |
| Meloxicam | 92 | 35 |
| Abatacept/Maltosebrand: Orencia | 64 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$5,100 across 264 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
- 2006-08-14
- Last updated
- 2023-01-09
- Certified
- 2023-01-09
Frequently asked questions
- What is Boris Ratiner's NPI number?
- Boris Ratiner's National Provider Identifier (NPI) is 1821001496, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Boris Ratiner's specialty?
- Boris Ratiner is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Boris Ratiner located?
- Boris Ratiner's practice location on file with NPPES is 18386 Ventura Blvd, Tarzana, CA 91356-4219.
- What is Boris Ratiner's phone number?
- The practice phone number listed in the NPPES registry for Boris Ratiner is (818) 996-4077.
- Does Boris Ratiner accept Medicare?
- Boris Ratiner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Boris Ratiner's NPI active?
- Yes — Boris Ratiner's NPI (1821001496) is active in the NPPES registry as of the last update on 2023-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.