Vivian Ngawan Siu
- Medicare services, 2024
- 365
- Medicare patients, 2024
- 174
- Part D claims, 2024
- 11
- MIPS score, 2024
- 91
- Hospital affiliations
- 1
- Practice address
- 259 1st St, Mineola, NY 11501
- Practice phone
- Call (516) 576-1820
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
NYU Langone Hospitals - Long Island
Mineola, New York
Find Vivian Siu'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.
Vivian Ngawan Siu is an internist in Mineola, New York
Vivian Siu practices at NYU Langone Hospitals - Long Island in Mineola, New York.
Vivian Siu's NPI, 1689934556, was assigned on May 24, 2012. Vivian Siu graduated from NYIT College Of Osteopathic Medicine in 2012. Vivian Siu holds New York license 2830611.
- NPI
- 1689934556NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6406143957
- NPI enumeration date
- May 24, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (516) 576-1820
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Vivian Ngawan Siu practices at NYU Langone Hospitals - Long Island in Mineola, New York
Vivian Siu's primary practice is NYU Langone Hospitals - Long Island, at 259 1st St, Mineola, NY 11501 in Nassau County. The practice phone is (516) 576-1820.
- NYU Langone Hospitals - Long Island259 1st St, Mineola, NY 11501 · Nassau CountyPhone(516) 576-1820
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Vivian Ngawan Siu is affiliated with 2 sites of care and 1 medical group
Vivian Siu's primary practice is NYU Langone Hospitals - Long Island in Mineola, New York. Vivian Siu is also affiliated with Tisch Hospital. The medical group on file is NYU Langone Orthopedic Surgery Associates.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Vivian Ngawan Siu's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Vivian Siu practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| NYU Langone Hospitals - Long Island | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Vivian Ngawan Siu is one of 9,643 internists in New York
Internal medicine is Vivian Siu's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Vivian Siu is licensed in New York.
Specialties and state licenses
- Internal medicine, New YorkPrimary
Internists near Vivian Siu
Counts of internists 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
Vivian Ngawan Siu billed Medicare for 365 services in 2024
CMS data shows 365 Medicare services from Vivian Siu across 5 procedure codes in 2024, for 174 Medicare patients. Medicare paid $32,091 for them. Every service was in a facility, such as a hospital, rather than an office.
Vivian Siu's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8642024: 36558%
Vivian Siu compared with the New York median for internists, 2024
- Vivian Siu
- New York median
- Medicare services
- 365vs 42614% below
- Medicare patients
- 174vs 15810% above
- Part D claims
- 17vs 62297% below
Medians across 9,428 internists in New York with Dmand AI profiles that report each measure.
Vivian Siu'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
Vivian Ngawan Siu treated 174 Medicare patients in 2024, average age 76
CMS counts 174 Medicare patients who saw Vivian Siu in 2024. The largest group is 75 to 84, with 60 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 29% are also on Medicaid. Their average risk score is 3.52, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Vivian Siu's median patient age at 74, with 45% women.
Vivian Siu's Medicare patients by age, 2024
Vivian Siu's Medicare patients by sex, 2024
- Women8348%
- Men9152%
Chronic conditions among Vivian Siu's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease72%
- Arthritis66%
- Ischemic heart disease63%
- Diabetes60%
- Heart failure57%
- COPD47%
Share of Medicare patients with each condition. A patient can have several.
Vivian Siu's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women45%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Vivian Ngawan Siu wrote 11 Medicare Part D claims in 2024
In 2024, Vivian Siu wrote 11 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $50 in total drug cost.
Vivian Siu's most prescribed drugs by claims, 2016
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
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
Vivian Ngawan Siu scored 91 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Vivian Siu for performance year 2024, reported as part of a group. Vivian Siu accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Vivian Siu's MIPS scores, performance year 2024
- 91of 100Final score
- 91.8of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 75of 100Cost
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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Vivian Ngawan Siu received $718 in industry payments from 2016 to 2025
CMS Open Payments shows 28 general payments to Vivian Siu from 7 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $291.
General payments to Vivian Siu by program year, 2016 to 2025
Companies that paid Vivian Siu the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Vivian Ngawan Siu graduated from NYIT College Of Osteopathic Medicine
Vivian Siu graduated from NYIT College Of Osteopathic Medicine in 2012.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Vivian Ngawan Siu'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| 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 Vivian Ngawan Siu
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Vivian Ngawan Siu's NPI number?
Vivian Ngawan Siu's NPI number is 1689934556. It was assigned on May 24, 2012, and it is active in the NPI Registry.
What does Vivian Ngawan Siu specialize in?
Vivian Ngawan Siu is an internist in Mineola, New York. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Vivian Ngawan Siu practice?
Vivian Siu practices at 259 1st St, Mineola, NY 11501. Vivian Siu's primary practice is NYU Langone Hospitals - Long Island in Mineola, New York.
What is Vivian Ngawan Siu's office phone number?
The practice phone on file for Vivian Siu is (516) 576-1820.
What is Vivian Ngawan Siu's medical license number?
Vivian Siu holds New York license 2830611.
Which hospitals is Vivian Ngawan Siu affiliated with?
Vivian Siu is affiliated with Tisch Hospital.
What medical group is Vivian Ngawan Siu part of?
Vivian Siu is linked to NYU Langone Orthopedic Surgery Associates.
Does Vivian Ngawan Siu accept Medicare?
Yes. CMS data shows Vivian Siu billed Medicare for 365 services in 2024, and Vivian Siu accepts Medicare assignment.
What is Vivian Ngawan Siu's MIPS score?
Vivian Siu's MIPS final score for performance year 2024 is 91 out of 100, reported as part of a group.
How many Medicare patients does Vivian Ngawan Siu see?
CMS counts 174 Medicare patients who saw Vivian Siu in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Vivian Ngawan Siu bill to Medicare?
In 2024, Vivian Siu's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and hospital inpatient care (99239).
Where did Vivian Ngawan Siu go to medical school?
Vivian Siu graduated from NYIT College Of Osteopathic Medicine in 2012.
What drugs does Vivian Ngawan Siu prescribe most?
In 2016 Medicare Part D data, Vivian Siu's most prescribed drugs by claims were Lisinopril.
Has Vivian Ngawan Siu received payments from drug or device companies?
CMS Open Payments shows $718 in general payments to Vivian Siu from 7 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Vivian Ngawan Siu been practicing?
Vivian Siu graduated from medical school in 2012, 14 years ago.
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