Grant Masashi Hayashi, M.D.
Anatomic Pathology & Clinical Pathology Physician · Reno, NV
Grant Masashi Hayashi, M.D. is an anatomic pathology & clinical pathology physician with a practice address in Reno, Nevada, and NPI 1962405290, issued on May 31, 2005. Check the license (Nevada 9368, as entered in NPPES) on the Nevada State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Grant Masashi Hayashi
- Credential
- M.D.
- Primary taxonomy
- Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
- License numbers
- 9368 NV
A55802 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1350 Stardust St, Reno, NV 89503
- Phone
- (775) 746-3400
- Enumerated
- May 31, 2005
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (775) 746-3411
- Medicare enrollment
- Enrolled (PECOS I20060613000243); accepts Medicare assignment
- Medical or professional school
- University Of Hawaii John A. Burns School Of Medicine, 1994
- Entity
- Type 1 · individual
8 nearest anatomic pathology & clinical pathology physician records → All 102 in Nevada → Look up another NPI →
Also registered at 1350 Stardust St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Wen Chuan, M.D.Anatomic Pathology & Clinical Pathology Physician1477556702
- Brian Davis, M.D.Anatomic Pathology & Clinical Pathology Physician1164677944
- Donald Lawrie, M.D.Anatomic Pathology & Clinical Pathology Physician1063414183
- Mylinh Mac, M.D.Anatomic Pathology & Clinical Pathology Physician1760632087
- Gregg Manson, M.D.Anatomic Pathology & Clinical Pathology Physician1134123953
- Glen Sewell, M.D.Anatomic Pathology & Clinical Pathology Physician1083618805
Verify Grant Masashi Hayashi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNevada State Board of Medical Examiners
Search for license 9368Check 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): 81.8 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).
Bills Medicare through one group practice
- Diagnostic Pathology Medical Group IncCarson City, NV
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Grant Masashi Hayashi among 102 anatomic pathology & clinical pathology physician records in Nevada
Grant Masashi Hayashi, M.D. is one of 102 anatomic pathology & clinical pathology physician records with a practice address in Nevada. 56% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 56% of these records are
- In the CMS Doctors and Clinicians fileYes · 49% of these records are
- Graduated1994 · median 2006 among the 50 with a school on file
- Record last updated2007 · 75% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0102X and a Nevada practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anatomic Pathology & Clinical Pathology Physician providers in Nevada
There are 102 anatomic pathology & clinical pathology physician records in Nevada.
All 102 in Nevada → Every provider in Reno → Anatomic Pathology & Clinical Pathology Physician nationwide →
The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes
- Giorgi Berulava, MDReno, NV 895031780954982
- Wen Chuan, M.D.Reno, NV 895031477556702
- Brian Davis, M.D.Reno, NV 895031164677944
- Johnathan Hollyfield, MDReno, NV 895031407293442
- Donald Lawrie, M.D.Reno, NV 895031063414183
- Mylinh Mac, M.D.Reno, NV 895031760632087
- Gregg Manson, M.D.Reno, NV 895031134123953
- Michael Powell, MDReno, NV 895031003134107
Common questions
What is Grant Masashi Hayashi, M.D.'s NPI number?
Grant Masashi Hayashi, M.D.'s National Provider Identifier (NPI) is 1962405290, issued on May 31, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Grant Masashi Hayashi, M.D. located?
The NPPES record lists a practice address at 1350 Stardust St, Reno, NV, 89503. Phone: (775) 746-3400. Providers update this record themselves, so call before visiting.
How can I verify Grant Masashi Hayashi, M.D.'s license?
NPPES lists Nevada license number 9368, as entered by the provider. Search the Nevada State Board of Medical Examiners at https://medboard.nv.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Grant Masashi Hayashi, M.D.'s MIPS final score?
The 2023 MIPS final score is 81.8 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.