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Dr. Junichi Shimamura , MD

Surgery โ€ข Valhalla, NY

Active NPI 1962109702 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

100 Woods Rd
Valhalla, NY 105951530

Call 9144938381 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

100 Woods Rd

Valhalla, NY 105951530

Telephone 9144938381
Organization at the Same NPPES Address or Phone
Westchester Radiation Medicine, Pc Facility NPI 1255328324

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

CMS Doctors and Clinicians lists 1 group name: Westchester Medical Center Advanced Physician Services Pc. See the list

Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File

Graduation Year

2008

Medicare patients

100 people with Original Medicare in 2024

Different Original Medicare patients in 2024; counts below 11 are hidden; this does not show availability or quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider, 2024.

Medicare-allowed amount

About $53,890 in 2024

The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.

What this does not show: Medicare-allowed amount

This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2024.

Paid by Medicare

About $42,835 in 2024

The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.

What this does not show: Paid by Medicare

This is not the clinician's income and not a measure of quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2024.

Open Payments general payments, program year 2025

All general payments: $7,377.13 across 46 records.

By nature of payment

  • Travel and Lodging: $5,187.56 across 13 records.
  • Food and Beverage: $2,189.57 across 33 records.

Reporting-company totals (3 largest of 8)

  • ABIOMED: $1,762.11 across 21 records.
  • W. L. Gore & Associates, Inc.: $1,641.93 across 7 records.
  • TransMedics, Inc.: $1,620.33 across 2 records.

A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.

See the full table

Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).

Guide: How to read an Open Payments record

Years since graduation

18 years (graduated 2008)

CMS Doctors and Clinicians data list 2008 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File.

NPI first issued

2023

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians; Medicare.gov, โ€œDoes your provider accept Medicare as full payment?โ€

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Shimamura has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Shimamura as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Valhalla and New York

Billing and prescribing volume is not a quality rating.

Medicare Part B services

Fewer Medicare Part B services than 65% of clinicians listed under Surgery in Valhalla, NY (2024, 13 clinicians with data). Median for this group: 118. Middle half: 56 to 194.

Fewer Medicare Part B services than 75% of clinicians listed under Surgery in New York (2024, 991 clinicians with data). Median for this group: 191. Middle half: 83 to 381.

Medicare-allowed amount

A higher Medicare-allowed amount than 80% of clinicians listed under Surgery in Valhalla, NY (2024, 13 clinicians with data). Median for this group: $12,512. Middle half: $5,361 to $25,713.

A higher Medicare-allowed amount than 70% of clinicians listed under Surgery in New York (2024, 991 clinicians with data). Median for this group: $24,272. Middle half: $9,849 to $54,064.

Paid by Medicare

A higher Medicare payment amount than 80% of clinicians listed under Surgery in Valhalla, NY (2024, 13 clinicians with data). Median for this group: $9,907. Middle half: $4,271 to $20,333.

A higher Medicare payment amount than 75% of clinicians listed under Surgery in New York (2024, 991 clinicians with data). Median for this group: $18,754. Middle half: $7,491 to $41,963.

26 active clinicians are listed under Surgery with a practice address in Valhalla, NY (2,058 in New York).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Valhalla

7.7% of these 26 clinicians have the CMS telehealth indicator.

73.1% of these 26 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo ยท Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments ยท Program Year 2025
Disclosure Year:

Program year 2025 (payments made January 1 โ€“ December 31, 2025): 46 records totaling $7,377.13.

Manufacturer Payment Nature Product Type Amount ($)
TransMedics, Inc.
Travel and Lodging
Cash or cash equivalent
Organ Care System General $1,043.73
Abbott Laboratories
Travel and Lodging
In-kind items and services
TRICLIP General $860.48
TransMedics, Inc.
Travel and Lodging
Cash or cash equivalent
Organ Care System General $576.60
W. L. Gore & Associates, Inc.
Travel and Lodging
In-kind items and services
GORE TAG Conformable Thoracic Endoprosthesis General $534.57
ABIOMED
Travel and Lodging
In-kind items and services
โ€” General $423.50
Abbott Laboratories
Travel and Lodging
In-kind items and services
TRICLIP General $394.70
W. L. Gore & Associates, Inc.
Travel and Lodging
In-kind items and services
Product in Development General $353.38
W. L. Gore & Associates, Inc.
Travel and Lodging
In-kind items and services
Product in Development General $335.81
ABIOMED
Travel and Lodging
Cash or cash equivalent
โ€” General $300.50
ABIOMED
Travel and Lodging
In-kind items and services
โ€” General $252.08
AngioDynamics, Inc.
Food and Beverage
In-kind items and services
ANGIOVAC General $209.91
Medtronic, Inc.
Food and Beverage
In-kind items and services
COREVALVE EVOLUT R General $185.66
Medtronic, Inc.
Food and Beverage
In-kind items and services
COREVALVE EVOLUT R General $181.69
Medtronic, Inc.
Food and Beverage
In-kind items and services
LIGASURE General $166.66
W. L. Gore & Associates, Inc.
Food and Beverage
In-kind items and services
Product in Development General $165.97
ABIOMED
Food and Beverage
In-kind items and services
โ€” General $150.00
ABIOMED
Food and Beverage
In-kind items and services
โ€” General $145.66
W. L. Gore & Associates, Inc.
Food and Beverage
In-kind items and services
Product in Development General $113.93
W. L. Gore & Associates, Inc.
Food and Beverage
In-kind items and services
Product in Development General $113.15
Abbott Laboratories
Travel and Lodging
In-kind items and services
TRICLIP General $100.47
ABIOMED
Food and Beverage
Cash or cash equivalent
โ€” General $66.30
ABIOMED
Food and Beverage
In-kind items and services
โ€” General $55.79
ABIOMED
Food and Beverage
In-kind items and services
โ€” General $55.73
ABIOMED
Food and Beverage
In-kind items and services
โ€” General $49.97
ABIOMED
Food and Beverage
In-kind items and services
โ€” General $40.00

(top 25 shown)

Source: CMS Open Payments, program year 2025, released June 30, 2026.

Performed Procedures & Service Volume

Services billed to Original Medicare Part B in 2024.

CMS Part B ยท Data Year 2024

CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ€“ by Provider and Service data, 2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.

HCPCS Code Services Patients Submitted Charge Medicare Allowed
33361 Replacement of aortic valve through the skin and femoral artery
48 48 $5270.00 $881.34
33533 Coronary artery bypass using artery graft, 1 graft
16 16 $8131.00 $724.10

Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits

Submitted charges are billed amounts, not a price quote for your visit.

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2023-08-21
Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

License # reported to NPPES NY 324555

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: New York Office of the Professions.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - THORACIC SURGERY

Medicare Enrollment ID

I20230718000443

Enrollment State Jurisdiction

NY

PECOS Control ID

8527428945

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File

Westchester Medical Center Advanced Physician Services Pc

95 Grasslands Rd, Valhalla, NY 105951652

Phone: 9144936940

Westchester Medical Center Advanced Physician Services Pc

100 Woods Rd, Valhalla, NY 105951530

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

1 listed
Masashi Kai

Thoracic Surgery (Cardiothoracic Vascular Surgery)

NPI 1336391713

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

8 Historical Events
๐Ÿ“
Updated Practice Location August 21, 2023

Registered at 100 WOODS RD, VALHALLA, NY 105951530 (Tel: 9144938381)

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) August 21, 2023

Surgery (license number reported to NPPES: NY 324555)

โœ…
NPI Profile Active February 13, 2023

NPI status registered as active in NPPES database

๐Ÿ“
Practice Location (Initial Record) February 13, 2023

Registered at 1364 CLIFTON RD, EMORY UNIVERSITY HOSPITAL, ATLANTA, GA 30322 (Tel: 4047229934)

๐Ÿ“
Business Mailing Address (Initial Record) February 13, 2023

Registered at 1767 NORTH DECATUR RD NE, UNIVERSITY INN AT EMORY UNIT 410, ATLANTA, GA 30307 (Tel: 6789204471)

๐Ÿ‘ค
Provider Name / Credentials (Initial Record) February 13, 2023

Recorded as JUNICHI SHIMAMURA, M.D.

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) February 13, 2023

Student in an Organized Health Care Education/Training Program

๐ŸŸข
Initial NPI Registration & Enumeration February 13, 2023

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1962109702
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: February 13, 2023
Last Update: August 21, 2023
Sole Proprietor: Yes

Other Surgery Specialists in Valhalla

All Surgery Specialists in Valhalla

Mailing Address

1767 North Decatur Rd Ne, University Inn At Emory Unit 410

Atlanta, GA 30307

Phone: 6789204471

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.