Doctor profile · Federal record
Dr. William Larsen, FNP
Family Nurse Practitioner · Ithaca, NY
- NPI 1124409099
- MIPS 92.3 / 100 · 2023
- 11 yrs on file
- Male
- Solo practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
905 Hanshaw RD
Ithaca, NY 148501549
(607) 339-0670
fax (607) 319-5524 - Additional location
-
404 N Cayuga St
Ithaca, NY 148504219
(607) 277-0969
fax (607) 277-3242
Credentials & registration
- NPI registered
- June 2015 — 11 yrs on file
- Profile last updated
- August 23, 2022
- Specialty taxonomy
- 363LF0000X — NUCC code
- State license (1)
- New York #339752
- Medicaid
- NY #04173960
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1124409099. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
743
Distinct HCPCS
4
Medicare allowed
$46,758
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 253 | 141 | $102 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 240 | 162 | $72 | |
83036 |
Hemoglobin a1c level | 186 | 112 | $9 | |
95251 |
Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | 64 | 47 | $28 |
In context: peer comparison
Among 16 peers in Ithaca Family Nurse Practitioner, average services per provider: 214. This provider delivers 3.5× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,751
Patients
502
Total drug cost
$995,888
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levothyroxine Sodium | Generic | 253 | 74 | $5,896 |
| Metformin Hcl | Generic | 193 | 59 | $2,906 |
| Trulicity (Dulaglutide) | Brand | 192 | 40 | $300,559 |
| Jardiance (Empagliflozin) | Brand | 145 | 39 | $196,809 |
| Lantus Solostar (Insulin Glargine,Hum.Rec.Anlog) | Brand | 141 | 47 | $125,398 |
| Glipizide | Generic | 128 | 35 | $1,617 |
| Ozempic (Semaglutide) | Brand | 123 | 25 | $140,140 |
| Atorvastatin Calcium | Generic | 119 | 40 | $1,907 |
| Novolog Flexpen (Insulin Aspart) | Brand | 86 | 32 | $139,661 |
| Lisinopril | Generic | 73 | 22 | $812 |
Frequently asked questions
What is Dr. William Larsen's medical specialty?
Dr. William Larsen practices Family Nurse Practitioner in Ithaca, NY.
Where does Dr. William Larsen practice?
Dr. William Larsen practices at 905 Hanshaw RD, Ithaca, NY 148501549. Office phone: 6073390670.
What is Dr. William Larsen's NPI?
Dr. William Larsen's National Provider Identifier (NPI) is 1124409099, issued by NPPES.
What procedures does Dr. William Larsen commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); Hemoglobin a1c level (HCPCS 83036). Source: CMS Medicare Physician & Other Practitioners file.