Jason Kolfenbach is a Rheumatology/Immunology physician affiliated with University of Colorado Denver. OpenAlex indexes 43 publications with 1,146 citations (h-index 12); ClinicalTrials.gov lists 1 registered study matched to this name.
Overview
Scholarship
indexed output and impact (OpenAlex)Distinct works indexed by OpenAlex, matched via ORCID.
Total citations across indexed works.
Hirsch index, productivity × impact (OpenAlex).
Clinical & industry
trials, payments and federal fundingContact
The practice address and phone this provider lists in the federal NPPES (CMS) registry.
Practice address
12605 E 16th Ave
Aurora, CO 800452545
Telephone
720-848-0000Registry record last updated 26 Nov 2012.
Clinical trials
- Rheumatoid Arthritis Patients at Risk for Interstitial Lung Disease
Sponsor: University of Colorado, Denver
Registered studies on ClinicalTrials.gov where the overall official or a site investigator name-matches this physician, confirmed against known institution/geography. Latest few shown; the full list is part of the full profile.
Industry payments
1 company reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- Janssen Biotech, Inc.Program year20231 payment
Payment records matched to this physician's NPI in CMS Open Payments, program years 2021 onward.
Medicare prescribing footprint (2024)
The drugs this prescriber writes for Medicare patients, grouped by drug class and therapeutic area. Every percentage is a share of their total prescribing, so you can see what they prescribe most. These are proportions, not patient counts or dollar amounts. No condition is inferred: the claims record what was prescribed, never why.
Cancer & immunology
49.6%Folate Analog Metabolic Inhibitor19.4%Methotrexate100%Part D≥33 patientsTNF inhibitor10.5%Humira(Cf) Pen100%Part D<11 patients+ 4 more classes in this area
Metabolism & gastrointestinal
23.7%Corticosteroid15%Prednisone100%Part D≥30 patientsAntidiarrheal microorganisms4.7%Folic Acid100%Part D<11 patients+ 1 more class in this area
Antiparasitic
18.5%Antimalarial18.5%Hydroxychloroquine Sulfate100%Part D≥32 patients
Drug classes come from the WHO ATC and U.S. National Library of Medicine (RxClass) classifications; prescribing counts come from the CMS Medicare Part D Prescribers file. Each drug is counted once, under its primary class. Medicare fee-for-service only, so no Medicare Advantage, commercial, or pediatric prescribing is included. CMS publishes this data about 17 months after the fact.
Publications
Matched to this physician's OpenAlex author record; most-cited works shown first.
- Development, Usability, and Validity Evidence of a Rheumatology Telehealth Feedback Form
Arthritis Care & Research
2025 - Coronary Vasculitis in Takayasu’s: A Case Report and Review of the Literature on Optimal Surgical Intervention
Journal of Investigative Medicine High Impact Case Reports
2025 - Improving Access to Rheumatology Care: Evaluation of a Rheumatology Electronic Consultation Program
Arthritis Care & Research
2025 - Patient Characteristics, Diagnoses, and Management in a Combined Uveitis–Rheumatology Clinic
Ophthalmology and Therapy
2025
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A basic profile from our physician directory: identity and practice contact from the federal NPPES registry, research from OpenAlex, trials from ClinicalTrials.gov, payments from CMS Open Payments, shown itemized where we have matched records, as a count where we only have a total. This person hasn't been through our full identity-adjudication pipeline yet, so funding, congress activity and public presence aren't shown. Absence of a section means “not yet looked,” never “none found.”