Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Carolyn Kay Butler

Primary Care Nurse Practitioner in Vista, CA · enumerated 2005 · practices at Medical Group of North County, Inc..

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

National Provider Identifier

1801889506

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Registry record

Entity type Individual (Type 1)

Name Carolyn Kay Butler

Sex Female

Practice address 910 Sycamore Ave, Suite 270, Vista, CA, 92081

Phone (760) 598-1700

Fax (760) 598-1196

Enumeration date Aug 26, 2005

Last updated in NPPES Apr 30, 2008

Taxonomy & licenses

363LP2300X Primary Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License CA400963 NP8386 (CA) Primary

Other identifiers

Identifier	Type	State	Issuer
RN8386	Medicaid	CA	-

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

What specialty is Carolyn Butler?

Carolyn Butler is registered in NPPES with the primary taxonomy of Primary Care Nurse Practitioner. 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 →

Rupa Subramanian Hematology & Oncology Physician · Vista, CA NPI 1376547174 Chris Lewis Physician Assistant · Vista, CA NPI 1407883127 Stuart Kipper Internal Medicine Physician · Vista, CA NPI 1114956570 Mark Adler Hematology & Oncology Physician · Vista, CA NPI 1174552533 Medical Group of North County, Inc. Internal Medicine Physician · Vista, CA NPI 1306871306 Derek Helton Hematology & Oncology Physician · Vista, CA NPI 1801992839 Josephine Sutera Oncology Registered Nurse · Vista, CA NPI 1669671293

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-04-30.