Robert Rifkin, MD
NPI 1134103476 · Hematology & Oncology Physician · Denver, CO
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Rifkin, MD is a Hematology & Oncology Physician provider in Denver, CO (NPI 1134103476).
Provider details
- NPI number
- 1134103476
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 26187 (CO)
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
20 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
11,902 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) |
|---|---|---|
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 1,053 | $10 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 1,051 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,021 | $128 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 958 | $8 |
| Lactate Dehydrogenase (enzyme) Level83615 | 940 | $6 |
| Red Blood Count Automated, With Additional Calculations85046 | 909 | $5 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Acyclovir | 103 | 25 |
| Warfarin Sodium | 65 | 21 |
| Apixabanbrand: Eliquis | 63 | 14 |
| Rivaroxabanbrand: Xarelto | 60 | — |
| Lenalidomide | 53 | — |
| Potassium Chloride | 43 | — |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 34 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$24,115 across 21 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
- 2005-11-30
- Last updated
- 2025-02-04
- Certified
- 2025-02-04
Frequently asked questions
- What is Robert Rifkin's NPI number?
- Robert Rifkin's National Provider Identifier (NPI) is 1134103476, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Rifkin's specialty?
- Robert Rifkin is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Rifkin located?
- Robert Rifkin's practice location on file with NPPES is 1800 N Williams St Ste 200, Denver, CO 80218-1237.
- What is Robert Rifkin's phone number?
- The practice phone number listed in the NPPES registry for Robert Rifkin is (303) 388-4876.
- Does Robert Rifkin accept Medicare?
- Robert Rifkin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Rifkin's NPI active?
- Yes — Robert Rifkin's NPI (1134103476) is active in the NPPES registry as of the last update on 2025-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.