Gen J. Maruyama, M.D.
Diagnostic Radiology Physician · Lakewood, CO
Gen J. Maruyama, M.D. is a diagnostic radiology physician with a practice address in Lakewood, Colorado, and NPI 1518917392, issued on May 11, 2006. Check the license (Colorado 44907, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gen J. Maruyama
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License numbers
- 44907 CO
A62495 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11600 W 2ND PL, Lakewood, CO 80228
- Phone
- (720) 321-0000
- Enumerated
- May 11, 2006
- Record last updated
- Jan 4, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (720) 321-1621
- Medicaid ID
- 40906370 CO
- Medicare enrollment
- Enrolled (PECOS I20061110000080); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 1995
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 796 in Colorado → Look up another NPI →
Also registered at 11600 W 2ND PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rana Adamson, CRNACertified Registered Nurse Anesthetist1679511604
- Mason Adkins, CRNACertified Registered Nurse Anesthetist1639711179
- Lindsay AlvaradoMedical-Surgical Registered Nurse1093631517
- Clinton Anderson, M.D.Diagnostic Radiology Physician1053371054
- Jonathan Andrick, M.D.Emergency Medicine Physician1376832873
- Lila Bain, CRNACertified Registered Nurse Anesthetist1245262724
Verify Gen J. Maruyama in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 44907Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 81.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $224.38
1 payment: food and beverage; the largest payer was Inari Medical, Inc. The 8,048 providers of this specialty with any payment received $2,488.38 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Colorado Imaging Associates P CLakewood, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gen J. Maruyama among 796 diagnostic radiology physician records in Colorado
Gen J. Maruyama, M.D. is one of 796 diagnostic radiology physician records with a practice address in Colorado. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 52% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1995 · median 2006 among the 562 with a school on file
- Record last updated2017 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
105 diagnostic radiology physician records list a practice address in Lakewood
They are 105 of the 4,944 NPPES records with a practice address in Lakewood, and 796 diagnostic radiology physician records in Colorado.
All 796 in Colorado → Every provider in Lakewood → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Clinton Anderson, M.D.Lakewood, CO 802281053371054
- Brian Chong, M.D.Lakewood, CO 802281508840018
- Phillip Durand, DOLakewood, CO 802281124070271
- Robert Leibold, M.D.Lakewood, CO 802281598724171
- Raymond Mencini, M.D.Lakewood, CO 802281831158468
- Charles Norton, M.D.Lakewood, CO 802281497714034
- Jeffrey Quam, M.D.Lakewood, CO 802281902889934
- Steven Ross, M.D.Lakewood, CO 802281073582284
Common questions
What is Gen J. Maruyama, M.D.'s NPI number?
Gen J. Maruyama, M.D.'s National Provider Identifier (NPI) is 1518917392, issued on May 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gen J. Maruyama, M.D. located?
The NPPES record lists a practice address at 11600 W 2ND PL, Lakewood, CO, 80228. Phone: (720) 321-0000. Providers update this record themselves, so call before visiting.
How can I verify Gen J. Maruyama, M.D.'s license?
NPPES lists Colorado license number 44907, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Gen J. Maruyama, M.D.'s MIPS final score?
The 2023 MIPS final score is 81.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.