Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Ann Clare Sirotniak, PT
Physical Therapist in Boulder, CO · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1346469236
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Registry record
Entity type Individual (Type 1)
Name Dr. Ann Clare Sirotniak
Credential PT
Sex Female
Practice address Wardenburg Health Ctr, Campus Box 119, Boulder, CO, 80309
Phone (303) 492-6280
Fax (303) 492-1248
Enumeration date Apr 25, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 4289 (CO) Primary
PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation.
About the PT credential
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
What specialty is Ann Sirotniak?
Ann Sirotniak is registered in NPPES with the primary taxonomy of Physical Therapist. 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.
Other providers at this practice address
Browse all → Christina Bryan Internal Medicine Physician · Boulder, CO NPI 1083754774 Pamela Talley Family Medicine Physician · Boulder, CO NPI 1346370111 Jerri Miller Physical Therapist · Boulder, CO NPI 1104950377 Thomas Kunstman Pediatric Adolescent Medicine Physician · Boulder, CO NPI 1346365244 Lisa Metrick Physical Therapy Clinic/Center · Boulder, CO NPI 1851419824 Barbara Oonk Student in an Organized Health Care Education/Training Program · Boulder, CO NPI 1659494003 Patricia Kintzing College Health Registered Nurse · Boulder, CO NPI 1316169014
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.