Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Granville G Howerton, RN-FNP

Family Nurse Practitioner in Lewisville, TX · enumerated 2006.

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

National Provider Identifier

1326088188

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Registry record

Entity type Individual (Type 1)

Name Granville G Howerton

Credential RN-FNP

Sex Male

Practice address Lewisville, TX, 75057

Phone (972) 436-7571

Enumeration date Jun 8, 2006

Last updated in NPPES May 6, 2010

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

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 598609 (TX) Primary

364SP0808X Psychiatric/Mental Health Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 598609 (TX) Secondary

Other identifiers

Identifier	Type	State	Issuer
122017001	Medicaid	TX	-

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 Granville Howerton?

Granville Howerton is registered in NPPES with the primary taxonomy of Family 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

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Long Term Care of Texas, Inc. Skilled Nursing Facility · Lewisville, TX NPI 1922088970 Eastland Memorial Hospital District Skilled Nursing Facility · Lewisville, TX NPI 1881736056 Meredith Honea Occupational Therapy Assistant · Lewisville, TX NPI 1962984963 Trinh Howe Speech-Language Pathologist · Lewisville, TX NPI 1063163434

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-05-06.