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Dr. Daniel Bowles, MD

Medical Oncology (Medical Oncology Physician)

12605 E 16th Ave
Aurora, CO 80045

Who else practices at this address →

Adams County includes primary care (2% of residents) shortage areas. About shortage areas

Call (303) 493-7000

  • Medicare participating

At a glance

Years since graduation
21
In the NPI registry since
2007
Medicare patients seen, 2024
66

Licensed in Colorado since 2007, 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

  • 2005Medical school: University of Colorado School of Medicine, Denver
  • 2007Registered 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

  • Medical Oncology Physician primary
    CO license 45842 (first issued 2007; active)
  • Hematology & Oncology Physician
    CO license 45842 (first issued 2007; active)

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

Map: Medical Oncology 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
66
Services billed
181
Patients’ average age
73
Most frequent Medicare services, 2023
ServiceTimesPatients
Established patient office or other outpatient visit, 40-54 minutes12754
Established patient office or other outpatient visit, 30-39 minutes3427

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

Most prescribed drugs, Medicare Part D 2024
DrugPrescriptions
Levothyroxine Sodium
Other prescribers in Aurora, CO
25
Gavreto (pralsetinib)24
Tafinlar (dabrafenib mesylate)18
Mekinist (trametinib dimethyl sulfoxide)18
Bicalutamide16
Ondansetron Hcl
Other prescribers in Aurora, CO
14
Lenvima (lenvatinib mesylate)12
Dexamethasone
Other prescribers in Aurora, CO
11
Prochlorperazine Maleate
Other prescribers in Aurora, CO
11

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

Payments from drug and device companies

In 2025, 1 companies reported 1 payments worth $1,963 in total to this clinician.

By company
Eisai Inc.$1,963
By type
Consulting Fee$1,963

What the payments were for

Largest payments other than meals
DateCompanyWhat it was forAmount
Mar 5, 2025Eisai Inc.
Mar 5, 2025
Consulting Fee
Lenvima · Oncology
$1,963

Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.

From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.

Who received the most in Colorado →

Industry-funded research

Named as a principal investigator on 7 industry-funded studies in 2025, from 7 companies. The companies reported $245,871 in research payments for these studies, mostly to the institutions running them.

From CMS Open Payments research payments, where companies name up to five principal investigators per payment. Research payments usually go to hospitals, universities and research sites, not to the investigator personally. A payment is not evidence of wrongdoing.

Other Medical Oncology clinicians in Aurora

Sources

NPI registry (CMS NPPES, November 2026; record last updated September 5, 2018), 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 1720134315. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.