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Dr. Daniel Muller, MD PHD

Rheumatology (Rheumatology Physician)

  • Medicare participating

At a glance

Years since graduation
41
In the NPI registry since
2006
Medicare patients seen, 2024
290

Licensed in Colorado since 2016, according to the Colorado Department of Regulatory Agencies. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.

The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is

Education and training

  • 1985Medical school: State University of New York at Stony Brook, School of Medicine
  • 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier

Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).

Specialties and state licenses

  • Rheumatology Physician primary
    CO license DR.0057117 (first issued 2016; active) · WI license 32216

As reported to the NPI registry. To confirm a license is current, check the state medical board.

Map: Rheumatology per capita by county →

Where they work

Hospitals

Medical groups

Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.

Medicare patients and services

Medicare patients, 2024
290
Services billed
24,945
Patients’ average age
72
Most frequent Medicare services, 2023
ServiceTimesPatients
Injection, infliximab, excludes biosimilar, 10 mg3,25013
Injection, denosumab, 1 mg1,14015
Established patient office or other outpatient visit, 30-39 minutes386225
Administration of chemotherapy into vein, 1 hour or less8739
Administration of chemotherapy into vein, each additional hour8233
Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less7629
New patient office or other outpatient visit, 45-59 minutes7272
Injection of drug or substance under skin or into muscle3722

Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.

Medicare prescriptions

Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.

Other Rheumatology clinicians in Fort Collins

Sources

NPI registry (CMS NPPES, November 2026; record last updated August 16, 2016), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1073589016. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.