Mrs. Ashlyn Seward Hammerstrom, BCBA

Mrs. Ashlyn Seward Hammerstrom is a Behavior Analyst provider (Behavior Analyst) practicing in Largo, FL, registered in the NPPES registry with NPI 1811505332 since 2020.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1811505332
Entity type	Individual (Type 1)
Name	Mrs. Ashlyn Seward Hammerstrom
Credential	BCBA
Sex	Female
Practice address	Largo, FL, 33771
Phone	4077600776
Enumeration date	2020-07-21
Last updated in NPPES	2023-04-16

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
103K00000X	Behavior Analyst	Primary	12364481	FL

Copy-ready billing details

Provider: Ashlyn Hammerstrom, BCBA
NPI: 1811505332
Taxonomy: 103K00000X (Behavior Analyst)
Address: Largo, FL, 33771

Verify this record

Cross-check NPI 1811505332 against the authoritative CMS record: view Mrs. Ashlyn Seward Hammerstrom 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

What specialty is Ashlyn Hammerstrom?

Ashlyn Hammerstrom is registered in NPPES with the primary taxonomy of Behavior Analyst. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2023-04-16.