CardiologyCardiovascular SystemPsychological Safety
Dr. Margo M. Vassar, MD
NPI1578784708PAC ID0345349791
- Medicare services, 2024
- 648
- Medicare patients, 2024
- 561
- Part D claims, 2024
- 13
- Publications
- 1
- MIPS score, 2024
- 97
- 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. Vassar'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. Margo M. Vassar is a cardiologist in Honolulu, Hawaii
Dr. Vassar practices at The Queen's Medical Center in Honolulu, Hawaii, part of The Queen's Health Systems.
Dr. Vassar's NPI, 1578784708, was assigned on May 2, 2007. Dr. Vassar graduated from University of Maryland School of Medicine in 2001. Dr. Vassar holds Hawaii license MD-15863.
NPI and contact details
- NPI
- 1578784708NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0345349791
- NPI enumeration date
- May 2, 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
- Female
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Margo M. Vassar practices at The Queen's Medical Center in Honolulu, Hawaii
Dr. Vassar'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. Margo M. Vassar is affiliated with 4 sites of care and 3 medical groups
Dr. Vassar's primary practice is The Queen's Medical Center in Honolulu, Hawaii, part of The Queen's Health Systems. Dr. Vassar is also affiliated with Kona Community Hospital. The medical group on file is The Queen's Medical Center. Dmand AI also links Dr. Vassar to 2 more group practices and clinics and 2 medical groups, each named with a free account.
Kona Community HospitalThe Queen's Medical Center2 group practices and clinicsNames with a free account2 medical groupsNames with a free account
See all 7 affiliations for Dr. VassarSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Margo M. Vassar's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Vassar practices, 4 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 |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Margo M. Vassar is one of 84 cardiologists in Hawaii
Cardiovascular disease is Dr. Vassar's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Vassar is licensed in Hawaii.
Specialties and state licenses
- Cardiovascular disease, HawaiiPrimary
Cardiologists near Dr. Vassar
Counts of cardiologists 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. Margo M. Vassar billed Medicare for 648 services in 2024
CMS data shows 648 Medicare services from Dr. Vassar across 9 procedure codes in 2024, for 561 Medicare patients. Medicare paid $29,712 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024648
Medicare patients561
Paid by Medicare$29,712
Procedure codes9
Dr. Vassar's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 6272024: 5847%
- Office and hospital visits
- 2023: 422024: 6452%
Dr. Vassar compared with the Hawaii median for cardiologists, 2024
- Dr. Vassar
- Hawaii median
- Medicare services
- 648vs 79418% below
- Medicare patients
- 561vs 45623% above
- Part D claims
- 101vs 1,34292% below
Medians across 82 cardiologists in Hawaii with Dmand AI profiles that report each measure.
Dr. Vassar'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 Dr. Vassar?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Vassar and other cardiologists in Hawaii.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Margo M. Vassar treated 561 Medicare patients in 2024, average age 76
CMS counts 561 Medicare patients who saw Dr. Vassar in 2024. The largest group is 65 to 74, with 207 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 12% are also on Medicaid. Their average risk score is 2.06, 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. Vassar's median patient age at 75, with 45% women.
Medicare patients, 2024561
Average age76
Average risk score2.06
Also on Medicaid12%
Dr. Vassar's Medicare patients by age, 2024
Dr. Vassar's Medicare patients by sex, 2024
- Women23742%
- Men32458%
Chronic conditions among Dr. Vassar's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease54%
- Ischemic heart disease49%
- Diabetes48%
- Heart failure46%
- Atrial fibrillation44%
- Arthritis39%
Share of Medicare patients with each condition. A patient can have several.
Dr. Vassar's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women45%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Margo M. Vassar wrote 13 Medicare Part D claims in 2024
In 2024, Dr. Vassar wrote 13 Medicare Part D claims. They cover 6 drugs, with $18,805 in total drug cost. In 2022, CMS named 38 claims across 3 drugs.
Part D claims, 202413
Drugs named by CMS6
Total drug cost$18,805
Dr. Vassar's most prescribed drugs by claims, 2023
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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 382023: 101166%
Drugs named by CMS: 6 in 2023, 3 in 2022.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Margo M. Vassar 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. Vassar for performance year 2024, reported through an alternative payment model (APM). Dr. Vassar accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Vassar'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.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Margo M. Vassar has 1 publication on record
Dmand AI links 1 paper to Dr. Vassar in 2023. Dr. Vassar's most frequent co-author is Sandra Jean Lewis, MD.
Papers1
Dr. Vassar's most frequent co-authors
Recent publications by Dr. Vassar
See who Dr. Vassar researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Vassar works with, so you can find a warm path to the right cardiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Margo M. Vassar received $4,187 in industry payments from 2016 to 2025
CMS Open Payments shows 58 general payments to Dr. Vassar from 20 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 91% of the total. Abbott Laboratories paid the most, $970.
General payments to Dr. Vassar by program year, 2016 to 2025
General payments to Dr. Vassar by kind, 2016 to 2025
$4.2Kin total
- Food and beverage$3,79991%
- Travel and lodging$3889%
Companies that paid Dr. Vassar the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Margo M. Vassar graduated from University of Maryland School of Medicine
Dr. Vassar graduated from University of Maryland School of Medicine in 2001.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Margo M. Vassar'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) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - 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) |
| 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. Margo M. Vassar
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. Margo M. Vassar's NPI number?
Dr. Margo M. Vassar's NPI number is 1578784708. It was assigned on May 2, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Margo M. Vassar?
Dr. Margo M. Vassar is a cardiologist in Honolulu, Hawaii. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Margo M. Vassar practice?
Dr. Vassar practices at 1301 Punchbowl St, Honolulu, HI 96813. Dr. Vassar's primary practice is The Queen's Medical Center in Honolulu, Hawaii, part of The Queen's Health Systems. Dmand AI also links Dr. Vassar to 2 group practices and clinics and 2 medical groups.
What is Dr. Margo M. Vassar's office phone number?
The practice phone on file for Dr. Vassar is (808) 538-9011.
What is Dr. Margo M. Vassar's medical license number?
Dr. Vassar holds Hawaii license MD-15863.
Which hospitals is Dr. Margo M. Vassar affiliated with?
Dr. Vassar practices at The Queen's Medical Center in Honolulu, Hawaii. Dr. Vassar is also affiliated with Kona Community Hospital.
What medical group is Dr. Margo M. Vassar part of?
Dr. Vassar is linked to The Queen's Medical Center. Dmand AI links Dr. Vassar to 2 more medical groups.
Does Dr. Margo M. Vassar accept Medicare?
Yes. CMS data shows Dr. Vassar billed Medicare for 648 services in 2024, and Dr. Vassar accepts Medicare assignment.
What is Dr. Margo M. Vassar's MIPS score?
Dr. Vassar'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. Margo M. Vassar see?
CMS counts 561 Medicare patients who saw Dr. Vassar in 2024, with an average age of 76.
Show 7 more questionsShow fewer questions
What services does Dr. Margo M. Vassar bill to Medicare?
In 2024, Dr. Vassar's most billed Medicare services were heart test or procedure (93306), heart test or procedure (93325) and heart test or procedure (93320).
Where did Dr. Margo M. Vassar go to medical school?
Dr. Vassar graduated from University of Maryland School of Medicine in 2001.
What drugs does Dr. Margo M. Vassar prescribe most?
In 2023 Medicare Part D data, Dr. Vassar's most prescribed drugs by claims were Metoprolol Succinate, Spironolactone and Eliquis.
Has Dr. Margo M. Vassar received payments from drug or device companies?
CMS Open Payments shows $4,187 in general payments to Dr. Vassar from 20 companies from 2016 to 2025. The largest total came from Abbott Laboratories.
How long has Dr. Margo M. Vassar been practicing?
Dr. Vassar graduated from medical school in 2001, 25 years ago.
Does Dr. Margo M. Vassar do research?
Dmand AI links 1 publication to Dr. Vassar.
Who does Dr. Margo M. Vassar publish with?
Dr. Vassar's most frequent co-authors are Sandra Jean Lewis, MD (1 shared paper).
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