Fiona Williams, FNP-BC
- Medicare patients, 2024
- 220
- Part D claims, 2024
- 670
- MIPS score, 2024
- 97
- Hospital affiliations
- 1
- Medical groups
- 3
- Practice address
- 1991 Marcus Avenue, Lake Success, NY 11042
- Practice phone
- Call (317) 796-7565
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
New Hyde Park Endoscopy
Surgery Center - Medicare-Certified · Lake Success, New York
Find Fiona Williams' 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.
Fiona Williams is a family nurse practitioner in New Hyde Park, New York
Fiona Williams practices at New Hyde Park Endoscopy in Lake Success, New York.
Fiona Williams' NPI, 1083352314, was assigned on May 25, 2022. Fiona Williams holds New York license 349373.
- NPI
- 1083352314NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0143605451
- NPI enumeration date
- May 25, 2022
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (317) 796-7565
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Fiona Williams practices at New Hyde Park Endoscopy in Lake Success, New York
Fiona Williams' primary practice is New Hyde Park Endoscopy, at 1991 Marcus Avenue, Lake Success, NY 11042. The practice phone is (317) 796-7565.
- New Hyde Park Endoscopy1991 Marcus Avenue, Lake Success, NY 11042Phone(317) 796-7565
Source: Dmand AI Affiliation Data
Fiona Williams is affiliated with 5 sites of care and 3 medical groups
Fiona Williams' primary practice is New Hyde Park Endoscopy in Lake Success, New York. Fiona Williams is also affiliated with North Shore University Hospital. The medical group on file is Northwell Health Physician Partners Cardiology at Great Neck. Dmand AI also links Fiona Williams to 3 more group practices and clinics and 2 medical groups, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Fiona Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Fiona Williams practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| New Hyde Park Endoscopy | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Fiona Williams is one of 10,214 family nurse practitioners in New York
Family is Fiona Williams' primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Fiona Williams is licensed in New York.
Specialties and state licenses
- Family nurse practitioner, New YorkPrimary
Family nurse practitioners near Fiona Williams
Counts of family nurse practitioners 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
Fiona Williams treated 220 Medicare patients in 2024, average age 74
CMS counts 220 Medicare patients who saw Fiona Williams in 2024. The largest group is 75 to 84, with 86 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 18% are also on Medicaid. Their average risk score is 2.27, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Fiona Williams' median patient age at 63, with 59% women.
Fiona Williams' Medicare patients by age, 2024
Fiona Williams' Medicare patients by sex, 2024
- Women12155%
- Men9945%
Chronic conditions among Fiona Williams' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis64%
- Ischemic heart disease55%
- Diabetes54%
- Chronic kidney disease35%
- Anxiety32%
- Heart failure31%
Share of Medicare patients with each condition. A patient can have several.
Fiona Williams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women59%
- Men37%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Fiona Williams wrote 670 Medicare Part D claims in 2024
In 2024, Fiona Williams wrote 670 Medicare Part D claims for 322 patients. 81% of them were for generic drugs.
Fiona Williams' Part D claims by kind of drug, 2024
- Generic543 claims81%
- Brand-name and other127 claims19%
Drug classes CMS tracks in Fiona Williams' Part D claims, 2024
- Antibiotics10%69 of 670 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
Fiona Williams 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 Fiona Williams for performance year 2024, reported as part of a group. Fiona Williams accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Fiona Williams' MIPS scores, performance year 2024
- 97of 100Final score
- 100of 100Quality
- 40of 100Improvement Activities
- 80of 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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Sources for Fiona Williams'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 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) |
| 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 Fiona Williams
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Fiona Williams' NPI number?
Fiona Williams' NPI number is 1083352314. It was assigned on May 25, 2022, and it is active in the NPI Registry.
What does Fiona Williams specialize in?
Fiona Williams is a family nurse practitioner in New Hyde Park, New York. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Fiona Williams practice?
Fiona Williams practices at 1991 Marcus Avenue, Lake Success, NY 11042. Fiona Williams' primary practice is New Hyde Park Endoscopy in Lake Success, New York. Dmand AI also links Fiona Williams to 3 group practices and clinics and 2 medical groups.
What is Fiona Williams' office phone number?
The practice phone on file for Fiona Williams is (317) 796-7565.
What is Fiona Williams' medical license number?
Fiona Williams holds New York license 349373.
Which hospitals is Fiona Williams affiliated with?
Fiona Williams is affiliated with North Shore University Hospital.
What medical group is Fiona Williams part of?
Fiona Williams is linked to Northwell Health Physician Partners Cardiology at Great Neck. Dmand AI links Fiona Williams to 2 more medical groups.
Does Fiona Williams accept Medicare?
Yes. CMS lists Fiona Williams as accepting Medicare assignment.
What is Fiona Williams' MIPS score?
Fiona Williams' MIPS final score for performance year 2024 is 97 out of 100, reported as part of a group.
How many Medicare patients does Fiona Williams see?
CMS counts 220 Medicare patients who saw Fiona Williams in 2024, with an average age of 74.
How long has Fiona Williams been practicing?
Fiona Williams graduated from medical school in 2021, 5 years ago.
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