Skip to main content

Dr. Daniel G. Gridley, M.D.

Radiology (Diagnostic Radiology Physician)

350 W Thomas Rd
Phoenix, AZ 85013

Who else practices at this address →

Maricopa County includes primary care (13% of residents) and dental (0% of residents) and mental health (4% of residents) shortage areas. About shortage areas

Call (602) 406-3430

  • Medicare participating

At a glance

Years since graduation
25
In the NPI registry since
2006
Medicare patients seen, 2024
355

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

  • 2001Medical school: University of Nebraska College 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

  • Diagnostic Radiology Physician primary
    AZ license 34207

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

Map: Radiology 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
355
Services billed
603
Patients’ average age
68
Most frequent Medicare services, 2023
ServiceTimesPatients
X-ray of chest, 1 view221106
X-ray of chest, 2 views6866
Ct scan head or brain without contrast5148
X-ray of abdomen, 1 view4834
Ct scan of upper spine without contrast1616
X-ray of foot, minimum of 3 views1414
Ultrasound study of arm or leg veins with compression and maneuvers1313
Ct scan of lower spine without contrast1111

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.

Other Radiology clinicians in Phoenix

Sources

NPI registry (CMS NPPES, November 2026; record last updated July 8, 2007), 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 1194821975. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.