Robert Melvin Rifkin, MD
Hematology & Oncology Physician · Denver, CO
Robert Melvin Rifkin, MD is a hematology & oncology physician with a practice address in Denver, Colorado, and NPI 1134103476, issued on Nov 30, 2005. Check the license (Colorado 26187, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Robert Melvin Rifkin
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 26187 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1800 N Williams St Ste 200, Denver, CO 80218
- Phone
- (303) 388-4876
- Enumerated
- Nov 30, 2005
- Record last updated
- Feb 4, 2025
- Fax
- (303) 285-5097
- Medicaid ID
- 01261874 CO
- Medicare enrollment
- Enrolled (PECOS I20100215000122); accepts Medicare assignment
- Medical or professional school
- University Of Colorado School Of Medicine, Denver, 1982
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 212 in Colorado → Look up another NPI →
Also registered at 1800 N Williams St Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michele Basche, MDHematology & Oncology Physician1306820022
- Colleen Bassoukos, FNP-CFamily Nurse Practitioner1821862368
- Eleanor BrammerNurse Practitioner1013300268
- Lindsay Chisholm, LCSWClinical Social Worker1700372133
- Kathryn Davis, RNRegistered Nurse1659212801
- Molly Davis, NP-CGerontology Nurse Practitioner1467114322
Verify Robert Melvin Rifkin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 26187Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% more Medicare Part D claims than the average hematology & oncology physician in 2024
999 Medicare Part D claims for 184 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims. 16 claims were for opioids.
Most prescribed
- Acyclovir103 claims
- Warfarin Sodium65 claims
- Eliquis63 claims
- Xarelto60 claims
- Lenalidomide53 claims
- Potassium Chloride43 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.
The MIPS final score for 2023 (Medicare payment program): 84.8 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $24,115.01
21 payments; by number, the most common kind was consulting fee; the largest payer was Regeneron Pharmaceuticals, Inc. 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
- Rocky Mountain Cancer Centers LLPDenver, CO
- Yampa Valley Medical CenterSteamboat Spr, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Melvin Rifkin among 212 hematology & oncology physician records in Colorado
Robert Melvin Rifkin, MD is one of 212 hematology & oncology physician records with a practice address in Colorado. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 70% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1982 · median 2004 among the 150 with a school on file
- Record last updated2025 · 59% 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 Colorado 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 Colorado
There are 212 hematology & oncology physician records in Colorado.
All 212 in Colorado → Every provider in Denver → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Michele Basche, MDDenver, CO 802181306820022
- Scott Bearman, MDDenver, CO 802181528042249
- Mark Brunvand, MDDenver, CO 802181891779534
- Allen Cohn, MDDenver, CO 802181316921976
- Deborah Cook, M.D.Denver, CO 802181598706186
- Kerry Fisher, MDDenver, CO 802181730195033
- Richard Hesky, M.D.Denver, CO 802181225061914
- Ioana Hinshaw, MDDenver, CO 802181033193180
Common questions
What is Robert Melvin Rifkin, MD's NPI number?
Robert Melvin Rifkin, MD's National Provider Identifier (NPI) is 1134103476, issued on Nov 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Robert Melvin Rifkin, MD located?
The NPPES record lists a practice address at 1800 N Williams St Ste 200, Denver, CO, 80218. Phone: (303) 388-4876. Providers update this record themselves, so call before visiting.
How can I verify Robert Melvin Rifkin, MD's license?
NPPES lists Colorado license number 26187, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert Melvin Rifkin, MD prescribe under Medicare Part D?
In 2024, Robert Melvin Rifkin, MD had 999 Medicare Part D claims for 184 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Robert Melvin Rifkin, MD's MIPS final score?
The 2023 MIPS final score is 84.8 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.