Tiffany Si-Ya Sun, PA-C
- Medicare patients, 2024
- 33
- Part D claims, 2024
- 233
- MIPS score, 2024
- 85
- Hospital affiliations
- 1
- Industry payments
- $167
- Practice address
- 3400 Spruce St, Philadelphia, PA 19104
- Practice phone
- Call (215) 662-6289
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Tiffany Sun'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.
Tiffany Si-Ya Sun is a surgical physician assistant in Philadelphia, Pennsylvania
Tiffany Sun practices at Hospital of the University of Pennsylvania in Philadelphia, Pennsylvania, part of University of Pennsylvania.
Tiffany Sun's NPI, 1124582259, was assigned on January 23, 2019. Tiffany Sun holds Pennsylvania license MA060257.
- NPI
- 1124582259NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6204174576
- NPI enumeration date
- January 23, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (215) 662-6289
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Tiffany Si-Ya Sun practices at Hospital of the University of Pennsylvania in Philadelphia, Pennsylvania
Tiffany Sun's primary practice is Hospital of the University of Pennsylvania, at 3400 Spruce St, Philadelphia, PA 19104 in Philadelphia County. The practice phone is (215) 662-6289.
- Hospital of the University of Pennsylvania3400 Spruce St, Philadelphia, PA 19104 · Philadelphia CountyPhone(215) 662-6289
Source: Dmand AI Affiliation Data
Tiffany Si-Ya Sun is affiliated with 1 site of care and 1 medical group
Tiffany Sun's primary practice is Hospital of the University of Pennsylvania in Philadelphia, Pennsylvania, part of University of Pennsylvania. The medical group on file is Penn Medicine Lancaster General Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Tiffany Si-Ya Sun's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Tiffany Sun practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hospital of the University of Pennsylvania | Available with a free account |
Source: Dmand AI Technology Install Data
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Tiffany Si-Ya Sun is one of 624 surgical physician assistants in Pennsylvania
Surgical is Tiffany Sun's primary specialty in the NPI Registry, under taxonomy code 363AS0400X. Tiffany Sun is licensed in Pennsylvania.
Specialties and state licenses
- Surgical physician assistant, PennsylvaniaPrimary
Surgical physician assistants near Tiffany Sun
Counts of surgical physician assistants 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
Tiffany Si-Ya Sun treated 33 Medicare patients in 2024, average age 72
CMS counts 33 Medicare patients who saw Tiffany Sun in 2024. The largest group is 75 to 84, with 18 patients. 75% of them have heart failure, and 75% have high blood pressure. Their average risk score is 2.63, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Tiffany Sun's median patient age at 65, with 42% women.
Tiffany Sun's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Tiffany Sun's Medicare patients, 2024
- Heart failure75%
- High blood pressure75%
- High cholesterol75%
- Atrial fibrillation67%
- Ischemic heart disease61%
- Chronic kidney disease48%
- Diabetes45%
- Arthritis39%
Share of Medicare patients with each condition. A patient can have several.
Tiffany Sun's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women42%
- Men58%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Tiffany Si-Ya Sun wrote 233 Medicare Part D claims in 2024
In 2024, Tiffany Sun wrote 233 Medicare Part D claims for 90 patients. 86% of them were for generic drugs.
Tiffany Sun's Part D claims by kind of drug, 2024
- Generic201 claims86%
- Brand-name and other32 claims14%
Drug classes CMS tracks in Tiffany Sun's Part D claims, 2024
- Antibiotics8%18 of 233 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Tiffany Si-Ya Sun scored 85 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 85 out of 100 for Tiffany Sun for performance year 2024, reported as part of a group. Tiffany Sun accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Tiffany Sun's MIPS scores, performance year 2024
- 85of 100Final score
- 73.6of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 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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Tiffany Si-Ya Sun received $167 in industry payments in 2025
CMS Open Payments shows 7 general payments to Tiffany Sun from 3 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Kestra Medical Technology Services, Inc. paid the most, $89.
Companies that paid Tiffany Sun the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Tiffany Si-Ya Sun'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 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 (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) |
| 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 Tiffany Si-Ya Sun
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Tiffany Si-Ya Sun's NPI number?
Tiffany Si-Ya Sun's NPI number is 1124582259. It was assigned on January 23, 2019, and it is active in the NPI Registry.
What does Tiffany Si-Ya Sun specialize in?
Tiffany Si-Ya Sun is a surgical physician assistant in Philadelphia, Pennsylvania. The primary specialty in the NPI Registry is Surgical Physician Assistant (taxonomy code 363AS0400X).
Where does Tiffany Si-Ya Sun practice?
Tiffany Sun practices at 3400 Spruce St, Philadelphia, PA 19104. Tiffany Sun's primary practice is Hospital of the University of Pennsylvania in Philadelphia, Pennsylvania, part of University of Pennsylvania.
What is Tiffany Si-Ya Sun's office phone number?
The practice phone on file for Tiffany Sun is (215) 662-6289.
What is Tiffany Si-Ya Sun's medical license number?
Tiffany Sun holds Pennsylvania license MA060257.
Which hospitals is Tiffany Si-Ya Sun affiliated with?
Tiffany Sun practices at Hospital of the University of Pennsylvania in Philadelphia, Pennsylvania.
What medical group is Tiffany Si-Ya Sun part of?
Tiffany Sun is linked to Penn Medicine Lancaster General Health.
Does Tiffany Si-Ya Sun accept Medicare?
Yes. CMS lists Tiffany Sun as accepting Medicare assignment.
What is Tiffany Si-Ya Sun's MIPS score?
Tiffany Sun's MIPS final score for performance year 2024 is 85 out of 100, reported as part of a group.
How many Medicare patients does Tiffany Si-Ya Sun see?
CMS counts 33 Medicare patients who saw Tiffany Sun in 2024, with an average age of 72.
Has Tiffany Si-Ya Sun received payments from drug or device companies?
CMS Open Payments shows $167 in general payments to Tiffany Sun from 3 companies from 2025 to 2025. The largest total came from Kestra Medical Technology Services, Inc.
How long has Tiffany Si-Ya Sun been practicing?
Tiffany Sun graduated from medical school in 2018, 8 years ago.
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