Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Gen J Maruyama, MD

Individual provider Diagnostic Radiology Physician · NPI 1518917392

Gen J Maruyama, MD practises Diagnostic Radiology in Lakewood, Colorado. Graduated from Boston University School of Medicine in 1995, 31 years ago. Practices with Colorado Imaging Associates P C, a 61-clinician group and accepts Medicare assignment. Licensed in California and Colorado.

Years since qualifying
31
Trained at
Boston University School of Medicine
Licensed in
CA, CO
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

11600 W 2nd Pl
Lakewood, CO 80228-1527
Phone: (720) 321-0000
Fax: (720) 321-1621
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 44907 (CO)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence A62495 (CA)

Record details

NPI number1518917392
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 11, 2006
Last updated in NPPESJanuary 4, 2017

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolBOSTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1995 (31 years in practice)
Group practice Colorado Imaging Associates P C — 61 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients1,100
Services billed 1,403 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Colorado Imaging Associates P C

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 61 clinicians in the practice; 12 are shown here.

Other providers in Lakewood