ExtremitiesHawaiiTrauma Centers
Dr. Michael S. Hayashi, MD
NPI1699976308PAC ID9234263740
- Medicare services, 2024
- 37
- Medicare patients, 2024
- 31
- Publications
- 8
- MIPS score, 2024
- 97
- Hospital affiliations
- 1
- Practice address
- 1301 Punchbowl St, Honolulu, HI 96813
- Practice phone
- Call (808) 538-9011
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hayashi's professional email, personal email and mobile number
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Dr. Michael S. Hayashi is a general surgeon in Honolulu, Hawaii
Dr. Hayashi practices at The Queen's Medical Center in Honolulu, Hawaii, part of The Queen's Health Systems.
Dr. Hayashi's NPI, 1699976308, was assigned on May 30, 2007. Dr. Hayashi holds Hawaii license 15572.
NPI and contact details
- NPI
- 1699976308NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9234263740
- NPI enumeration date
- May 30, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (808) 538-9011
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael S. Hayashi practices at The Queen's Medical Center in Honolulu, Hawaii
Dr. Hayashi's primary practice is The Queen's Medical Center, at 1301 Punchbowl St, Honolulu, HI 96813 in Honolulu County. The practice phone is (808) 538-9011.
- The Queen's Medical Center1301 Punchbowl St, Honolulu, HI 96813 · Honolulu CountyPhone(808) 538-9011
Source: Dmand AI Affiliation Data
Dr. Michael S. Hayashi is affiliated with 3 sites of care and 2 medical groups
Dr. Hayashi's primary practice is The Queen's Medical Center in Honolulu, Hawaii, part of The Queen's Health Systems. The medical group on file is The Queen's Medical Center. Dmand AI also links Dr. Hayashi to 2 more group practices and clinics and 1 medical group, each named with a free account.
The Queen's Medical Center2 group practices and clinicsNames with a free account1 medical groupName with a free account
See all 5 affiliations for Dr. HayashiSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael S. Hayashi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hayashi practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| The Queen's Medical Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Michael S. Hayashi is one of 142 general surgeons in Hawaii
Surgery is Dr. Hayashi's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Hayashi is licensed in Hawaii.
Specialties and state licenses
- Surgery, HawaiiPrimary
General surgeons near Dr. Hayashi
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
142general surgeons in Hawaii78general surgeons in Honolulu23general surgeons at The Queen's Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Michael S. Hayashi billed Medicare for 37 services in 2024
CMS data shows 37 Medicare services from Dr. Hayashi across 1 procedure code in 2024, for 31 Medicare patients. Medicare paid $5,846 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202437
Medicare patients31
Paid by Medicare$5,846
Procedure codes1
Dr. Hayashi's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 582024: 3736%
Dr. Hayashi compared with the Hawaii median for general surgeons, 2024
- Dr. Hayashi
- Hawaii median
- Medicare services
- 37vs 11167% below
- Medicare patients
- 31vs 8262% below
Medians across 131 general surgeons in Hawaii with Dmand AI profiles that report each measure.
Dr. Hayashi'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael S. Hayashi treated 31 Medicare patients in 2024, average age 76
CMS counts 31 Medicare patients who saw Dr. Hayashi in 2024. The largest group is 65 to 74, with 12 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 2.18, 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. Hayashi's median patient age at 57, with 44% women.
Medicare patients, 202431
Average age76
Average risk score2.18
Dr. Hayashi's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Hayashi's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Atrial fibrillation55%
- Arthritis48%
- Chronic kidney disease45%
- Diabetes42%
- Heart failure39%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hayashi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women44%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael S. Hayashi scored 97 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Dr. Hayashi for performance year 2024, reported through an alternative payment model (APM). Dr. Hayashi accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Hayashi's MIPS scores, performance year 2024
- 97of 100Final score
- 89.8of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 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. Michael S. Hayashi has 8 publications on record
Dmand AI links 8 papers to Dr. Hayashi, published from 2016 to 2023. The most frequent topics are Trauma Centers, Blood Volume and Brain Injuries, Traumatic. Dr. Hayashi has published most often in J Trauma Acute Care Surg. Dr. Hayashi's most frequent co-authors are David S. Inouye, MD, Jason Riki Kaneshige, MD and Randall Zain Allison, MD.
Papers8
Years published2016 to 2023
Dr. Hayashi's papers by year, 2016 to 2023
Topics Dr. Hayashi writes about most
- Trauma Centers
- Blood Volume
- Brain Injuries, Traumatic
- Critical Illness
- Wounds and Injuries
Dr. Hayashi's most frequent co-authors
- David S. Inouye, MD2 shared papers
- Jason Riki Kaneshige, MD2 shared papers
- Randall Zain Allison, MD1 shared paper
Recent publications by Dr. Hayashi
Trauma Surg Acute Care Open
Blood VolumeBlood Volume DeterminationCritical Care
J Trauma Acute Care Surg
Blood VolumeCardiac OutputCritical Illness
Brain ContusionBrain Injuries, TraumaticDisease Progression
See who Dr. Hayashi researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Hayashi 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. Michael S. Hayashi received $381 in industry payments from 2016 to 2024
CMS Open Payments shows 18 general payments to Dr. Hayashi from 9 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 64% of the total. Astellas Pharma US Inc paid the most, $131.
General payments to Dr. Hayashi by program year, 2016 to 2024
General payments to Dr. Hayashi by kind, 2016 to 2024
$381in total
- Food and beverage$24564%
- Education$10026%
- Consulting fees$369%
Companies that paid Dr. Hayashi the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Michael S. Hayashi'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) |
| 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. Michael S. Hayashi
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. Michael S. Hayashi's NPI number?
Dr. Michael S. Hayashi's NPI number is 1699976308. It was assigned on May 30, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael S. Hayashi?
Dr. Michael S. Hayashi is a general surgeon in Honolulu, Hawaii. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Michael S. Hayashi practice?
Dr. Hayashi practices at 1301 Punchbowl St, Honolulu, HI 96813. Dr. Hayashi's primary practice is The Queen's Medical Center in Honolulu, Hawaii, part of The Queen's Health Systems. Dmand AI also links Dr. Hayashi to 2 group practices and clinics and 1 medical group.
What is Dr. Michael S. Hayashi's office phone number?
The practice phone on file for Dr. Hayashi is (808) 538-9011.
What is Dr. Michael S. Hayashi's medical license number?
Dr. Hayashi holds Hawaii license 15572.
Which hospitals is Dr. Michael S. Hayashi affiliated with?
Dr. Hayashi practices at The Queen's Medical Center in Honolulu, Hawaii.
What medical group is Dr. Michael S. Hayashi part of?
Dr. Hayashi is linked to The Queen's Medical Center. Dmand AI links Dr. Hayashi to 1 more medical group.
Does Dr. Michael S. Hayashi accept Medicare?
Yes. CMS data shows Dr. Hayashi billed Medicare for 37 services in 2024, and Dr. Hayashi accepts Medicare assignment.
What is Dr. Michael S. Hayashi's MIPS score?
Dr. Hayashi's MIPS final score for performance year 2024 is 97 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Michael S. Hayashi see?
CMS counts 31 Medicare patients who saw Dr. Hayashi in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Dr. Michael S. Hayashi bill to Medicare?
In 2024, Dr. Hayashi's most billed Medicare services were critical care (99291).
Has Dr. Michael S. Hayashi received payments from drug or device companies?
CMS Open Payments shows $381 in general payments to Dr. Hayashi from 9 companies from 2016 to 2024. The largest total came from Astellas Pharma US Inc.
How long has Dr. Michael S. Hayashi been practicing?
Dr. Hayashi graduated from medical school in 2003, 23 years ago.
Does Dr. Michael S. Hayashi do research?
Dmand AI links 8 publications to Dr. Hayashi, published from 2016 to 2023.
Who does Dr. Michael S. Hayashi publish with?
Dr. Hayashi's most frequent co-authors are David S. Inouye, MD (2 shared papers), Jason Riki Kaneshige, MD (2 shared papers) and Randall Zain Allison, MD (1 shared paper).
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