NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Kathryn Sullivan Mitra, ACNP-BC

Acute Care Nurse Practitioner in Stamford, CT · enumerated 2008.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1255598629

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Kathryn Sullivan Mitra
Credential ACNP-BC
Sex Female
Practice address 29 Hospital Plz Ste 501, Stamford, CT, 06902
Enumeration date May 21, 2008
Last updated in NPPES Apr 4, 2023

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 530419 (NY) Secondary
363LA2100X Acute Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 430397 (NY) Secondary
363LA2100X Acute Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 005244 (CT) 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.

Read the full guide → Validate an NPI →

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 Kathryn Mitra?
Kathryn Mitra is registered in NPPES with the primary taxonomy of Acute Care 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 →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-04-04.