Dr. Gregory S. Nishimura, MD
- Medicare services, 2022
- 12
- Part D claims, 2020
- 11
- Industry payments
- $14,903
- Affiliated sites
- 2
- Medical groups
- 5
- Practice address
- 149 Josephine St, Santa Cruz, CA 95060
- Practice phone
- Call (831) 200-4217
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Medxcare Health Professionals
Santa Cruz, California
Find Dr. Nishimura's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gregory S. Nishimura is a general surgeon in Santa Cruz, California
Dr. Nishimura practices at Medxcare Health Professionals in Santa Cruz, California.
Dr. Nishimura's NPI, 1881744795, was assigned on January 11, 2007. Dr. Nishimura graduated from Drexel University College of Medicine/Hahnemann University in 1994. Dr. Nishimura holds New York license 217807.
- NPI
- 1881744795NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6901132737
- NPI enumeration date
- January 11, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (831) 200-4217
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory S. Nishimura practices at Medxcare Health Professionals in Santa Cruz, California
Dr. Nishimura's primary practice is Medxcare Health Professionals, at 149 Josephine St, Santa Cruz, CA 95060 in Santa Cruz County. The practice phone is (831) 200-4217.
- Medxcare Health Professionals149 Josephine St, Santa Cruz, CA 95060 · Santa Cruz CountyPhone(831) 200-4217
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gregory S. Nishimura is affiliated with 3 sites of care and 5 medical groups
Dr. Nishimura's primary practice is Medxcare Health Professionals in Santa Cruz, California. The medical group on file is Cardiac Interventional Group. Dmand AI also links Dr. Nishimura to 4 more medical groups and 2 group practices and clinics, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory S. Nishimura's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nishimura practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Medxcare Health Professionals | Available with a free account |
| +2 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory S. Nishimura is one of 2,926 general surgeons in California
Surgery is Dr. Nishimura's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Nishimura is licensed in New York.
Specialties and state licenses
- Surgery, New YorkPrimary
General surgeons near Dr. Nishimura
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory S. Nishimura billed Medicare for 12 services in 2022
CMS data shows 12 Medicare services from Dr. Nishimura across 1 procedure code in 2022, all of them office visits. Medicare paid $1,462 for them. Every service was in an office.
Dr. Nishimura's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 142022: 1214%
Dr. Nishimura compared with the California median for general surgeons, 2022
- Dr. Nishimura
- California median
- Medicare services
- 12vs 16693% below
- Part D claims
- 11vs 3468% below
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. Nishimura's most billed Medicare procedure codes, 2022
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nishimura and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory S. Nishimura's patients have a median age of 66
Across all payers, Dmand AI patient panel data puts Dr. Nishimura's median patient age at 66, with 73% women.
Dr. Nishimura's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women73%
- Men23%
Source: Dmand AI Patient Panel Data
Dr. Gregory S. Nishimura wrote 11 Medicare Part D claims in 2020
In 2020, Dr. Nishimura wrote 11 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $425 in total drug cost. In 2019, CMS named 62 claims across 3 drugs.
Dr. Nishimura's most prescribed drugs by claims, 2020
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 622020: 1182%
Drugs named by CMS: 1 in 2020, 3 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Gregory S. Nishimura takes part in Medicare
Dr. Nishimura accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Gregory S. Nishimura received $14,903 in industry payments from 2016 to 2023
CMS Open Payments shows 106 general payments to Dr. Nishimura from 28 drug and device companies from 2016 to 2023. Education make up the largest share, 52% of the total. Intuitive Surgical, Inc. paid the most, $7,983.
General payments to Dr. Nishimura by program year, 2016 to 2023
General payments to Dr. Nishimura by kind, 2016 to 2023
- Education$7,75052%
- Food and beverage$5,88239%
- Travel and lodging$1,2719%
Companies that paid Dr. Nishimura the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory S. Nishimura graduated from Drexel University College of Medicine/Hahnemann University
Dr. Nishimura graduated from Drexel University College of Medicine/Hahnemann University in 1994.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory S. Nishimura's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregory S. Nishimura
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What is Dr. Gregory S. Nishimura's NPI number?
Dr. Gregory S. Nishimura's NPI number is 1881744795. It was assigned on January 11, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory S. Nishimura?
Dr. Gregory S. Nishimura is a general surgeon in Santa Cruz, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Gregory S. Nishimura practice?
Dr. Nishimura practices at 149 Josephine St, Santa Cruz, CA 95060. Dr. Nishimura's primary practice is Medxcare Health Professionals in Santa Cruz, California. Dmand AI also links Dr. Nishimura to 4 medical groups and 2 group practices and clinics.
What is Dr. Gregory S. Nishimura's office phone number?
The practice phone on file for Dr. Nishimura is (831) 200-4217.
What is Dr. Gregory S. Nishimura's medical license number?
Dr. Nishimura holds New York license 217807.
What medical group is Dr. Gregory S. Nishimura part of?
Dr. Nishimura is linked to Cardiac Interventional Group. Dmand AI links Dr. Nishimura to 4 more medical groups.
Does Dr. Gregory S. Nishimura accept Medicare?
Yes. CMS data shows Dr. Nishimura billed Medicare for 12 services in 2022, and Dr. Nishimura accepts Medicare assignment.
What services does Dr. Gregory S. Nishimura bill to Medicare?
In 2022, Dr. Nishimura's most billed Medicare services were office visit, new patient (99204).
Where did Dr. Gregory S. Nishimura go to medical school?
Dr. Nishimura graduated from Drexel University College of Medicine/Hahnemann University in 1994.
What drugs does Dr. Gregory S. Nishimura prescribe most?
In 2020 Medicare Part D data, Dr. Nishimura's most prescribed drugs by claims were Sucralfate.
Has Dr. Gregory S. Nishimura received payments from drug or device companies?
CMS Open Payments shows $14,903 in general payments to Dr. Nishimura from 28 companies from 2016 to 2023. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Gregory S. Nishimura been practicing?
Dr. Nishimura graduated from medical school in 1994, 32 years ago.
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