Mark Nishiya, MD
Urology Physician · Grand Junction, CO
Mark Nishiya, MD is a urology physician with a practice address in Grand Junction, Colorado, and NPI 1760411995, issued on Jul 1, 2006. Check the license (Colorado 330113, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark Nishiya
- Credential
- MD
- Primary taxonomy
- Urology Physician 208800000X
- License number
- 330113 CO
Self-reported in NPPES; status is on the state search - Practice location
- 2373 G RD, Grand Junction, CO 81505
- Phone
- (970) 243-3061
- Enumerated
- Jul 1, 2006
- Record last updated
- Sep 8, 2025
- Fax
- (970) 245-8369
- Medicaid ID
- 01330133 CO
- Medicare enrollment
- Enrolled (PECOS I20100329000553); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 1990
- Entity
- Type 1 · individual
8 nearest urology physician records → All 249 in Colorado → Look up another NPI →
Also registered at 2373 G RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sean Allen, RPHPharmacist1205271038
- Laurel Bartholomay, M.D.Obstetrics & Gynecology Physician1396718557
- Jason Bell, PASurgical Physician Assistant1730437617
- Amir Beshai, MDUrology Physician1588611149
- Laura Blau, PA-CPhysician Assistant1790020147
- Gary Blunk, PA-CSurgical Physician Assistant1891886503
Verify Mark Nishiya in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 330113Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average urology physician in 2024
358 Medicare Part D claims for 160 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 38 claims were for opioids.
Most prescribed
- Cephalexin59 claims
- Oxybutynin Chloride Er45 claims
- Estradiol36 claims
- Tamsulosin Hcl30 claims
- Nitrofurantoin23 claims
- Hydrocodone-Acetaminophen22 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $212.26
5 payments; by number, the most common kind was food and beverage; the largest payer was Bluewind Medical. The 9,340 providers of this specialty with any payment received $3,800.04 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.
2 hospitals and group practices
- Colorado Surgical Affiliates LLCGrand Junction, CO
- Eastern Rio Blanco County Health Service DistrictMeeker, CO · Critical Access Hospitals
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).
Mark Nishiya among 249 urology physician records in Colorado
Mark Nishiya, MD is one of 249 urology physician records with a practice address in Colorado. 80% 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 13% of them.
- NPI issued2006 · 13% of these records are older, 58% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1990 · median 2006 among the 175 with a school on file
- Record last updated2025 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208800000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Urology Physician providers in Colorado
There are 249 urology physician records in Colorado.
All 249 in Colorado → Every provider in Grand Junction → Urology Physician nationwide →
The 8 urology physician records with the nearest ZIP codes
- Michael Atwell, MDGrand Junction, CO 815051467958264
- Amir Beshai, MDGrand Junction, CO 815051588611149
- Caleb Stepan, M.D.Grand Junction, CO 815051023137940
- Timothy Vanadurongvan, M.D.Grand Junction, CO 815051508284506
- Nicholas Westfall, M.D.Grand Junction, CO 815051538458575
- Clifford Wanebo, M.D.Grand Junction, CO 815061225144173
- Scott Castle, MDGlenwood Springs, CO 816011063702538
- Jeffrey Fegan, MDGlenwood Springs, CO 816011982674594
Common questions
What is Mark Nishiya, MD's NPI number?
Mark Nishiya, MD's National Provider Identifier (NPI) is 1760411995, issued on Jul 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Nishiya, MD located?
The NPPES record lists a practice address at 2373 G RD, Grand Junction, CO, 81505. Phone: (970) 243-3061. Providers update this record themselves, so call before visiting.
How can I verify Mark Nishiya, MD's license?
NPPES lists Colorado license number 330113, 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.
How much does Mark Nishiya, MD prescribe under Medicare Part D?
In 2024, Mark Nishiya, MD had 358 Medicare Part D claims for 160 beneficiaries; the average among urology physician prescribers was 1,340. Part D covers Medicare prescriptions only.
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.