William David Larsen, FNP

  • Ithaca, NY
  • Family nurse practitioner
NPI1124409099
Medicare patients, 2024
172
Part D claims, 2024
2,981
MIPS score, 2024
94
Hospital affiliations
1
Medical groups
2
Practice address
1020 Craft Rd, Ithaca, NY 14850
Practice phone
Call (607) 274-4011
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Cayuga Medical Associates

Ithaca, New York

See all 5 affiliations

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William David Larsen is a family nurse practitioner in Ithaca, New York

William Larsen practices at Cayuga Medical Associates in Ithaca, New York.

William Larsen's NPI, 1124409099, was assigned on June 16, 2015. William Larsen holds New York license 339752.

NPI and contact details
NPI enumeration date
June 16, 2015
NPI status
Active
Practice phone
(607) 274-4011
Professional email
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Personal email
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Mobile number
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Sex
Male
Estimated age
37
Medical school graduation
2015

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data

William David Larsen practices at Cayuga Medical Associates in Ithaca, New York

William Larsen's primary practice is Cayuga Medical Associates, at 1020 Craft Rd, Ithaca, NY 14850 in Tompkins County. The practice phone is (607) 274-4011.

  • Cayuga Medical Associates
    1020 Craft Rd, Ithaca, NY 14850 · Tompkins CountyPhone(607) 274-4011

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

William David Larsen is affiliated with 3 sites of care and 2 medical groups

William Larsen's primary practice is Cayuga Medical Associates in Ithaca, New York. William Larsen is also affiliated with Cayuga Medical Center. The medical group on file is Cayuga Medical Associates. Dmand AI also links William Larsen to 1 more group practice or clinic and 1 medical group, each named with a free account.

See all 5 affiliations for William Larsen

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data

Dmand AI tracks the EHR system at William David Larsen's practice

Dmand AI tracks the electronic health record (EHR) system at each site where William Larsen practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Cayuga Medical AssociatesAvailable with a free account
+2 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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William David Larsen is one of 10,214 family nurse practitioners in New York

Family is William Larsen's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. William Larsen is licensed in New York.

Specialties and state licenses

  • Family nurse practitioner, New YorkPrimaryLicense 339752 · taxonomy 363LF0000X

Family nurse practitioners near William Larsen

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

William David Larsen treated 172 Medicare patients in 2024, average age 74

CMS counts 172 Medicare patients who saw William Larsen in 2024. The largest group is 65 to 74, with 71 patients. 75% of them have diabetes, and 75% have high blood pressure. 15% are also on Medicaid. Their average risk score is 1.50, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts William Larsen's median patient age at 64, with 52% women.

Medicare patients, 2024172
Average age74
Average risk score1.50
Also on Medicaid15%

William Larsen's Medicare patients by age, 2024

William Larsen's Medicare patients by sex, 2024

  • Women8449%
  • Men8851%

Chronic conditions among William Larsen's Medicare patients, 2024

  1. Diabetes75%
  2. High blood pressure75%
  3. High cholesterol65%
  4. Arthritis45%
  5. Chronic kidney disease37%
  6. Ischemic heart disease32%
  7. Mood disorders24%
  8. Atrial fibrillation23%

Share of Medicare patients with each condition. A patient can have several.

William Larsen's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 64

Patient panel by sex, all payers

  • Women52%
  • Men46%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

William David Larsen wrote 2,981 Medicare Part D claims in 2024

In 2024, William Larsen wrote 2,981 Medicare Part D claims for 293 patients. 43% of them were for generic drugs.

Part D claims, 20242,981
Part D patients293

William Larsen's Part D claims by kind of drug, 2024

  • Generic1,271 claims43%
  • Brand-name1,389 claims47%
  • Other321 claims11%

Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data

William David Larsen scored 94 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 94 out of 100 for William Larsen for performance year 2024, reported through an alternative payment model (APM).

William Larsen's MIPS scores, performance year 2024

  • 94of 100Final score
  • 82.9of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Sources for William David Larsen's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesClinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about William David Larsen

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is William David Larsen's NPI number?

William David Larsen's NPI number is 1124409099. It was assigned on June 16, 2015, and it is active in the NPI Registry.

What does William David Larsen specialize in?

William David Larsen is a family nurse practitioner in Ithaca, New York. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).

Where does William David Larsen practice?

William Larsen practices at 1020 Craft Rd, Ithaca, NY 14850. William Larsen's primary practice is Cayuga Medical Associates in Ithaca, New York. Dmand AI also links William Larsen to 1 group practice or clinic and 1 medical group.

What is William David Larsen's office phone number?

The practice phone on file for William Larsen is (607) 274-4011.

What is William David Larsen's medical license number?

William Larsen holds New York license 339752.

Which hospitals is William David Larsen affiliated with?

William Larsen is affiliated with Cayuga Medical Center.

What medical group is William David Larsen part of?

William Larsen is linked to Cayuga Medical Associates. Dmand AI links William Larsen to 1 more medical group.

What is William David Larsen's MIPS score?

William Larsen's MIPS final score for performance year 2024 is 94 out of 100, reported through an alternative payment model (APM).

How many Medicare patients does William David Larsen see?

CMS counts 172 Medicare patients who saw William Larsen in 2024, with an average age of 74.

How long has William David Larsen been practicing?

William Larsen graduated from medical school in 2015, 11 years ago.

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