Masashi Kai
- Medicare services, 2024
- 96
- Medicare patients, 2024
- 57
- Publications
- 62
- Clinical trials
- 4
- Hospital affiliations
- 2
- Practice address
- 330 Brookline Avenue, Boston, MA 02215
- Practice phone
- Call (617) 667-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Masashi Kai'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.
Masashi Kai is a cardiothoracic surgeon in Boston, Massachusetts
Masashi Kai practices at Beth Israel Deaconess Medical Center in Boston, Massachusetts, part of Beth Israel Lahey Health.
Masashi Kai's NPI, 1336391713, was assigned on October 16, 2008. Masashi Kai holds New York license 266182.
- NPI
- 1336391713NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5193905487
- NPI enumeration date
- October 16, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 667-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Masashi Kai practices at Beth Israel Deaconess Medical Center in Boston, Massachusetts
Masashi Kai's primary practice is Beth Israel Deaconess Medical Center, at 330 Brookline Avenue, Boston, MA 02215 in Suffolk County. The practice phone is (617) 667-7000.
- Beth Israel Deaconess Medical Center330 Brookline Avenue, Boston, MA 02215 · Suffolk CountyPhone(617) 667-7000
Source: Dmand AI Affiliation Data
Masashi Kai is affiliated with 2 sites of care and 1 medical group
Masashi Kai's primary practice is Beth Israel Deaconess Medical Center in Boston, Massachusetts, part of Beth Israel Lahey Health. Masashi Kai is also affiliated with Mount Auburn Hospital. The medical group on file is Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center (HMFP).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Masashi Kai's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Masashi Kai practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Beth Israel Deaconess Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Beth Israel Lahey Health and 6.2K+ hospitals, with verified contacts in the same login.
Masashi Kai is one of 166 cardiothoracic surgeons in Massachusetts
Thoracic surgery (cardiothoracic vascular surgery) is Masashi Kai's primary specialty in the NPI Registry, under taxonomy code 208G00000X. Masashi Kai is licensed in New York.
Specialties and state licenses
- Thoracic surgery (cardiothoracic vascular surgery), New YorkPrimary
Cardiothoracic surgeons near Masashi Kai
Counts of cardiothoracic 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
Masashi Kai billed Medicare for 96 services in 2024
CMS data shows 96 Medicare services from Masashi Kai across 5 procedure codes in 2024, for 57 Medicare patients. Medicare paid $45,290 for them. Every service was in a facility, such as a hospital, rather than an office.
Masashi Kai's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 702024: 9637%
Masashi Kai compared with the Massachusetts median for cardiothoracic surgeons, 2024
- Masashi Kai
- Massachusetts median
- Medicare services
- 96vs 19350% below
- Medicare patients
- 57vs 15263% below
Medians across 131 cardiothoracic surgeons in Massachusetts with Dmand AI profiles that report each measure.
Masashi Kai'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.
Need commercial claims for Masashi Kai?
Medicare shows one payer. Book a meeting to get commercial claims data for Masashi Kai and other cardiothoracic surgeons in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Masashi Kai treated 57 Medicare patients in 2024, average age 73
CMS counts 57 Medicare patients who saw Masashi Kai in 2024. The largest group is 65 to 74, with 29 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.32, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Masashi Kai's median patient age at 73, with 23% women.
Masashi Kai's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Masashi Kai's Medicare patients by sex, 2024
- Women1933%
- Men3867%
Chronic conditions among Masashi Kai's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease75%
- Heart failure70%
- Atrial fibrillation60%
- Diabetes53%
- Chronic kidney disease49%
- Arthritis40%
Share of Medicare patients with each condition. A patient can have several.
Masashi Kai's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women23%
- Men76%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Masashi Kai ranks in the 85th percentile for coronary artery bypass graft (cabg) in Medicare
Masashi Kai accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 31 procedures of coronary artery bypass graft (cabg) by Masashi Kai, more than 85% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Masashi Kai ranks in Medicare procedure volume
- Coronary artery bypass graft (CABG)
- 85th percentile31 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Pacemaker insertion or repair: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Masashi Kai has 62 publications on record
Dmand AI links 62 papers to Masashi Kai, published from 2012 to 2025. 2022 was the busiest year, with 18. The most frequent topics are Heart-Assist Devices, Extracorporeal Membrane Oxygenation and Heart Transplantation. Masashi Kai has published most often in Ann Thorac Surg. Masashi Kai's most frequent co-authors are Suguru Ohira, MD, PhD, Steven Lansman, MD and Ramin Malekan, MD.
Masashi Kai's papers by year, 2013 to 2025
Topics Masashi Kai writes about most
- Heart-Assist Devices
- Extracorporeal Membrane Oxygenation
- Heart Transplantation
- Heart Failure
- Tissue Donors
- Perfusion
- Aortic Dissection
- Shock, Cardiogenic
Masashi Kai's most frequent co-authors
- Suguru Ohira, MD, PhD50 shared papers
- Steven Lansman, MD25 shared papers
- Ramin Malekan, MD22 shared papers
Recent publications by Masashi Kai
See who Masashi Kai researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Masashi Kai works with, so you can find a warm path to the right cardiothoracic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Masashi Kai has worked on 4 clinical trials
Dmand AI links Masashi Kai to 4 clinical trials. 1 is still active or recruiting. Conditions studied include Heart Failure and Heart Diseases. TransMedics sponsors the most, 3.
Conditions in Masashi Kai's trials
- Heart Failure
- Heart Diseases
Investigators on the most trials with Masashi Kai
- Gregory Stephen Couper, MD4 shared trials
- Hari Reddy Mallidi, MD3 shared trials
- Karol Mudy, MD3 shared trials
Recent clinical trials with Masashi Kai
OCS Heart Perfusion (OHP) Post-Approval Registry (opens in a new tab)
Prevention of Non-Surgical Bleeding by Management of HeartMate II Patients Without Antiplatelet Therapy (opens in a new tab)
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Masashi Kai received $30,222 in industry payments from 2016 to 2025
CMS Open Payments shows 88 general payments to Masashi Kai from 11 drug and device companies from 2016 to 2025. Travel and lodging make up the largest share, 44% of the total. Zimmer Biomet Holdings, Inc. paid the most, $23,064. It also lists 4 research payments totaling $298 in 2020.
General payments to Masashi Kai by program year, 2016 to 2025
General payments to Masashi Kai by kind, 2016 to 2025
- Travel and lodging$13,29944%
- Consulting fees$13,00043%
- Food and beverage$3,92313%
Companies that paid Masashi Kai the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Masashi Kai'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)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 |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Masashi Kai
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Masashi Kai's NPI number?
Masashi Kai's NPI number is 1336391713. It was assigned on October 16, 2008, and it is active in the NPI Registry.
What does Masashi Kai specialize in?
Masashi Kai is a cardiothoracic surgeon in Boston, Massachusetts. The primary specialty in the NPI Registry is Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (taxonomy code 208G00000X).
Where does Masashi Kai practice?
Masashi Kai practices at 330 Brookline Avenue, Boston, MA 02215. Masashi Kai's primary practice is Beth Israel Deaconess Medical Center in Boston, Massachusetts, part of Beth Israel Lahey Health.
What is Masashi Kai's office phone number?
The practice phone on file for Masashi Kai is (617) 667-7000.
What is Masashi Kai's medical license number?
Masashi Kai holds New York license 266182.
Which hospitals is Masashi Kai affiliated with?
Masashi Kai practices at Beth Israel Deaconess Medical Center in Boston, Massachusetts. Masashi Kai is also affiliated with Mount Auburn Hospital.
What medical group is Masashi Kai part of?
Masashi Kai is linked to Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center (HMFP).
Does Masashi Kai accept Medicare?
Yes. CMS data shows Masashi Kai billed Medicare for 96 services in 2024, and Masashi Kai accepts Medicare assignment.
How many Medicare patients does Masashi Kai see?
CMS counts 57 Medicare patients who saw Masashi Kai in 2024, with an average age of 73.
What services does Masashi Kai bill to Medicare?
In 2024, Masashi Kai's most billed Medicare services were surgery: heart and blood vessels (33508), surgery: heart and blood vessels (33533) and surgery: heart and blood vessels (33518).
Show 4 more questionsShow fewer questions
Has Masashi Kai received payments from drug or device companies?
CMS Open Payments shows $30,222 in general payments to Masashi Kai from 11 companies from 2016 to 2025. The largest total came from Zimmer Biomet Holdings, Inc.
How long has Masashi Kai been practicing?
Masashi Kai graduated from medical school in 2002, 24 years ago.
Does Masashi Kai do research?
Dmand AI links 62 publications to Masashi Kai, published from 2012 to 2025. Masashi Kai has worked on 4 clinical trials.
Who does Masashi Kai publish with?
Masashi Kai's most frequent co-authors are Suguru Ohira, MD, PhD (50 shared papers), Steven Lansman, MD (25 shared papers) and Ramin Malekan, MD (22 shared papers).
Selling to thoracic surgery (cardiothoracic vascular surgery) practices?
See cardiothoracic surgeons in Massachusetts by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card