Doctor profile · Federal record
Dr. Mary Katherine Kosowski, A-GNP-C
Adult Health Nurse Practitioner (CMS: Nurse Practitioner) · West Seneca, NY
- NPI 1558937441
- Accepts Medicare
- 7 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
600 Harlem RD
West Seneca, NY 142241151
(716) 332-2121
fax (716) 332-2122 - Additional location
-
34 Benwood Ave
Buffalo, NY 142141761
(716) 986-9199
Credentials & registration
- NPI registered
- June 2021 — 5 yrs on file
- Profile last updated
- August 28, 2025
- Year of graduation
- 2019 — 7 yrs since
- Specialty taxonomy
- 363LA2200X — NUCC code
- State license (1)
- New York #F309522-01
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1558937441. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
299
Distinct HCPCS
3
Medicare allowed
$22,587
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 162 | 121 | $73 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 94 | 71 | $102 | |
95251 |
Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | 43 | 29 | $27 |
In context: peer comparison
Among 3 peers in this city , average services per provider: 243. This provider delivers 1.2× the peer median.Open Payments
Industry payments received
All-time total
$493
Transactions
23
Manufacturers
14
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Medtronic, Inc. | 3 | $104.89 | |
| Lilly USA, LLC | 4 | $84.89 | |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 3 | $57.99 | |
| Amneal Pharmaceuticals LLC | 2 | $46.32 | |
| Bayer Healthcare Pharmaceuticals Inc. | 2 | $41.74 | |
| RECORDATI_RARE_DISEASES_INC. | 1 | $23.72 | |
| Insulet Corporation | 1 | $21.75 | |
| SANOFI-AVENTIS U.S. LLC | 1 | $21.30 | |
| Alexion Pharmaceuticals, Inc. | 1 | $19.08 | |
| Chiesi USA, Inc. | 1 | $18.97 | |
| Mannkind Corporation | 1 | $16.29 | |
| Dexcom, Inc. | 1 | $14.62 | |
| ABBVIE INC. | 1 | $14.17 | |
| CeQur Corporation | 1 | $7.74 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,085
Patients
696
Total drug cost
$1,358,046
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levothyroxine Sodium | Generic | 428 | 141 | $9,830 |
| Trulicity (Dulaglutide) | Brand | 273 | 76 | $403,607 |
| Ozempic (Semaglutide) | Brand | 172 | 42 | $235,438 |
| Humalog Kwikpen U-100 (Insulin Lispro) | Brand | 163 | 53 | $177,119 |
| Metformin Hcl | Generic | 159 | 60 | $2,482 |
| Jardiance (Empagliflozin) | Brand | 157 | 50 | $162,146 |
| Lantus Solostar (Insulin Glargine,hum.Rec.Anlog) | Brand | 151 | 68 | $132,779 |
| Synthroid (Levothyroxine Sodium) | Brand | 108 | 35 | $10,045 |
| Mounjaro (Tirzepatide) | Brand | 99 | 31 | $111,000 |
| Metformin Hcl Er (Metformin Hcl) | Brand | 81 | 33 | $1,710 |
Hospital affiliations
Frequently asked questions
What is Dr. Mary Katherine Kosowski's medical specialty?
Dr. Mary Katherine Kosowski practices Adult Health Nurse Practitioner in West Seneca, NY.
Where does Dr. Mary Katherine Kosowski practice?
Dr. Mary Katherine Kosowski practices at 600 Harlem RD, West Seneca, NY 142241151. Office phone: 7163322121.
What is Dr. Mary Katherine Kosowski's NPI?
Dr. Mary Katherine Kosowski's National Provider Identifier (NPI) is 1558937441, issued by NPPES.
Does Dr. Mary Katherine Kosowski accept Medicare assignment?
Yes. Dr. Mary Katherine Kosowski accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mary Katherine Kosowski commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report (HCPCS 95251). Source: CMS Medicare Physician & Other Practitioners file.