Mrs. Mariann Graczyk, FNP
Mrs. Mariann Graczyk is a Family Nurse Practitioner provider (Nurse Practitioner) practicing in Olean, NY, registered in the NPPES registry with NPI 1801043617 since 2008. The credential FNP stands for Family Nurse Practitioner.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1801043617 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Mrs. Mariann Graczyk |
| Credential | FNP |
| Sex | Female |
| Practice address | 1 LEO MOSS DR, SUITE 4010, Olean, NY, 14760 |
| Phone | 7163738050 |
| Fax | 7167013737 |
| Enumeration date | 2008-08-22 |
| Last updated in NPPES | 2008-08-22 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 363LF0000X | Family Nurse Practitioner | Primary | F331428-1 | NY |
FNP — Family Nurse Practitioner: A nurse practitioner certified in family practice across the lifespan. About the FNP credential
Copy-ready billing details
Provider: Mariann Graczyk, FNP NPI: 1801043617 Taxonomy: 363LF0000X (Family Nurse Practitioner) Address: 1 LEO MOSS DR, SUITE 4010, Olean, NY, 14760
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1598711988 | County of Cattaraugus | Organization | Clinical Medical Laboratory | Olean, NY |
| 1336183805 | County of Cattaraugus County Treasurer | Organization | Home Health Agency | Olean, NY |
| 1134148570 | County of Cattaraugus | Organization | Public Health or Welfare Agency | Olean, NY |
| 1306941646 | County of Cattaraugus | Organization | Public Health or Welfare Agency | Olean, NY |
| 1659414696 | County of Cattaraugus | Organization | Mental Health Clinic/Center (Including Community Mental Health Center) | Olean, NY |
| 1457473514 | County of Cattaraugus | Organization | Public Health or Welfare Agency | Olean, NY |
| 1710180179 | Elizabeth Callen-Pratt | Individual | Counselor | Olean, NY |
| 1023211323 | Nicol Stier-Dowdell | Individual | Counselor | Olean, NY |
Verify this record
Cross-check NPI 1801043617 against the authoritative CMS record: view Mrs. Mariann Graczyk on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2008-08-22.