Coronary Artery BypassHeart-Assist DevicesHeart Failure
Dr. Junichi Shimamura, MD
NPI1962109702PAC ID8527428945
- Medicare services, 2024
- 64
- Medicare patients, 2024
- 100
- Publications
- 47
- MIPS score, 2024
- 75
- Hospital affiliations
- 2
- Practice address
- 100 Woods Rd, Valhalla, NY 10595
- Practice phone
- Call (914) 493-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Junichi Shimamura is a general surgeon in Valhalla, New York
Dr. Shimamura practices at Westchester Medical Center in Valhalla, New York, part of Westchester Medical Center Health Network.
Dr. Shimamura's NPI, 1962109702, was assigned on February 13, 2023. Dr. Shimamura graduated from Graduate School of Medicine and Faculty of Medicine, The University of Tokyo in 2008. Dr. Shimamura holds New York license 324555.
NPI and contact details
- NPI
- 1962109702NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8527428945
- NPI enumeration date
- February 13, 2023
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (914) 493-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Junichi Shimamura practices at Westchester Medical Center in Valhalla, New York
Dr. Shimamura's primary practice is Westchester Medical Center, at 100 Woods Rd, Valhalla, NY 10595 in Westchester County. The practice phone is (914) 493-7000.
- Westchester Medical Center100 Woods Rd, Valhalla, NY 10595 · Westchester CountyPhone(914) 493-7000
Source: Dmand AI Affiliation Data
Dr. Junichi Shimamura is affiliated with 2 sites of care and 1 medical group
Dr. Shimamura's primary practice is Westchester Medical Center in Valhalla, New York, part of Westchester Medical Center Health Network. Dr. Shimamura is also affiliated with HealthAlliance Hospital. The medical group on file is Westchester Medical Center Advanced Physician Services.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Junichi Shimamura's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Shimamura practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Westchester Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Junichi Shimamura is one of 1,604 general surgeons in New York
Surgery is Dr. Shimamura's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Shimamura is licensed in New York.
Specialties and state licenses
- Surgery, New YorkPrimary
General surgeons near Dr. Shimamura
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
1,604general surgeons in New York20general surgeons in Valhalla15general surgeons at Westchester Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Junichi Shimamura billed Medicare for 64 services in 2024
CMS data shows 64 Medicare services from Dr. Shimamura across 2 procedure codes in 2024, for 100 Medicare patients. Medicare paid $42,835 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202464
Medicare patients100
Paid by Medicare$42,835
Procedure codes2
Dr. Shimamura compared with the New York median for general surgeons, 2024
- Dr. Shimamura
- New York median
- Medicare services
- 64vs 15458% below
- Medicare patients
- 100vs 1098% below
Medians across 1,502 general surgeons in New York with Dmand AI profiles that report each measure.
Dr. Shimamura's most billed Medicare procedure codes, 2024
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. Shimamura and other general surgeons in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Junichi Shimamura treated 100 Medicare patients in 2024, average age 76
CMS counts 100 Medicare patients who saw Dr. Shimamura in 2024. The largest group is 75 to 84, with 44 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 2.32, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Shimamura's median patient age at 69, with 32% women.
Medicare patients, 2024100
Average age76
Average risk score2.32
Also on Medicaid20%
Dr. Shimamura's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Shimamura's Medicare patients by sex, 2024
- Women4343%
- Men5757%
Chronic conditions among Dr. Shimamura's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease75%
- Heart failure70%
- Atrial fibrillation57%
- Diabetes56%
- Arthritis53%
- Chronic kidney disease49%
Share of Medicare patients with each condition. A patient can have several.
Dr. Shimamura's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women32%
- Men67%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Junichi Shimamura scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Shimamura for performance year 2024, reported as part of a group. Dr. Shimamura accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 30 procedures of coronary artery bypass graft (cabg) by Dr. Shimamura, more than 84% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- MIPS final score, 2024
- 75 of 100
Where Dr. Shimamura ranks in Medicare procedure volume
- Coronary artery bypass graft (CABG)
- 84th percentile30 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Junichi Shimamura has 47 publications on record
Dmand AI links 47 papers to Dr. Shimamura, published from 2010 to 2025. 2024 was the busiest year, with 10. The most frequent topics are Heart-Assist Devices, Aortic Aneurysm, Thoracic and Aortic Dissection. Dr. Shimamura has published most often in Artif Organs. Dr. Shimamura's most frequent co-authors are Suguru Ohira, MD, PhD, Shinichi Fukuhara, MD and Toshiki Kuno, MD, PhD.
Papers47
Years published2010 to 2025
Dr. Shimamura's papers by year, 2014 to 2025
Topics Dr. Shimamura writes about most
- Heart-Assist Devices
- Aortic Aneurysm, Thoracic
- Aortic Dissection
- Heart Failure
- Aortic Valve
- Heart Transplantation
- Blood Vessel Prosthesis Implantation
- Aorta, Thoracic
Dr. Shimamura's most frequent co-authors
- Suguru Ohira, MD, PhD10 shared papers
- Shinichi Fukuhara, MD5 shared papers
- Toshiki Kuno, MD, PhD5 shared papers
Recent publications by Dr. Shimamura
Brain DeathCold IschemiaGraft Survival
See who Dr. Shimamura researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Shimamura works with, so you can find a warm path to the right general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Junichi Shimamura received $12,118 in industry payments from 2023 to 2025
CMS Open Payments shows 91 general payments to Dr. Shimamura from 10 drug and device companies from 2023 to 2025. Travel and lodging make up the largest share, 66% of the total. Abbott Laboratories paid the most, $3,433.
General payments to Dr. Shimamura by program year, 2023 to 2025
General payments to Dr. Shimamura by kind, 2023 to 2025
$12.1Kin total
- Travel and lodging$8,05866%
- Food and beverage$4,06034%
Companies that paid Dr. Shimamura the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Junichi Shimamura graduated from Graduate School of Medicine and Faculty of Medicine, The University of Tokyo
Dr. Shimamura graduated from Graduate School of Medicine and Faculty of Medicine, The University of Tokyo in 2008.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Junichi Shimamura'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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 DataMedicare Physician & Other Practitioners - by Provider (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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Junichi Shimamura
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Junichi Shimamura's NPI number?
Dr. Junichi Shimamura's NPI number is 1962109702. It was assigned on February 13, 2023, and it is active in the NPI Registry.
What kind of doctor is Dr. Junichi Shimamura?
Dr. Junichi Shimamura is a general surgeon in Valhalla, New York. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Junichi Shimamura practice?
Dr. Shimamura practices at 100 Woods Rd, Valhalla, NY 10595. Dr. Shimamura's primary practice is Westchester Medical Center in Valhalla, New York, part of Westchester Medical Center Health Network.
What is Dr. Junichi Shimamura's office phone number?
The practice phone on file for Dr. Shimamura is (914) 493-7000.
What is Dr. Junichi Shimamura's medical license number?
Dr. Shimamura holds New York license 324555.
Which hospitals is Dr. Junichi Shimamura affiliated with?
Dr. Shimamura practices at Westchester Medical Center in Valhalla, New York. Dr. Shimamura is also affiliated with HealthAlliance Hospital.
What medical group is Dr. Junichi Shimamura part of?
Dr. Shimamura is linked to Westchester Medical Center Advanced Physician Services.
Does Dr. Junichi Shimamura accept Medicare?
Yes. CMS data shows Dr. Shimamura billed Medicare for 64 services in 2024, and Dr. Shimamura accepts Medicare assignment.
What is Dr. Junichi Shimamura's MIPS score?
Dr. Shimamura's MIPS final score for performance year 2024 is 75 out of 100, reported as part of a group.
How many Medicare patients does Dr. Junichi Shimamura see?
CMS counts 100 Medicare patients who saw Dr. Shimamura in 2024, with an average age of 76.
Show 6 more questionsShow fewer questions
What services does Dr. Junichi Shimamura bill to Medicare?
In 2024, Dr. Shimamura's most billed Medicare services were surgery: heart and blood vessels (33361) and surgery: heart and blood vessels (33533).
Where did Dr. Junichi Shimamura go to medical school?
Dr. Shimamura graduated from Graduate School of Medicine and Faculty of Medicine, The University of Tokyo in 2008.
Has Dr. Junichi Shimamura received payments from drug or device companies?
CMS Open Payments shows $12,118 in general payments to Dr. Shimamura from 10 companies from 2023 to 2025. The largest total came from Abbott Laboratories.
How long has Dr. Junichi Shimamura been practicing?
Dr. Shimamura graduated from medical school in 2008, 18 years ago.
Does Dr. Junichi Shimamura do research?
Dmand AI links 47 publications to Dr. Shimamura, published from 2010 to 2025.
Who does Dr. Junichi Shimamura publish with?
Dr. Shimamura's most frequent co-authors are Suguru Ohira, MD, PhD (10 shared papers), Shinichi Fukuhara, MD (5 shared papers) and Toshiki Kuno, MD, PhD (5 shared papers).
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