Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Anna Theresa Koester, FNP-BC
Nurse Practitioner in Surprise, AZ · enumerated 2023.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1306627989
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Registry record
Entity type Individual (Type 1)
Name Anna Theresa Koester
Credential FNP-BC
Sex Female
Practice address 14800 W Mountain View Blvd Ste 160, Surprise, AZ, 85374
Phone (623) 584-3376
Fax (623) 584-3375
Enumeration date Oct 10, 2023
Last updated in NPPES Jan 24, 2025
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 308311 (AZ) Primary
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.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Anna Koester?
Anna Koester is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → James Barlow MOHS-Micrographic Surgery Physician · Surprise, AZ NPI 1982683405 Drew Reese Dermatology Physician · Surprise, AZ NPI 1750394227 Elizabeth Vesselovskaya Physician Assistant · Surprise, AZ NPI 1164961157 Havilah Dodd Physician Assistant · Surprise, AZ NPI 1740809615 Victoria Phan Medical Physician Assistant · Surprise, AZ NPI 1306440011
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-01-24.