Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Calvin Clark, RN, MSN, ACNP-BC

Acute Care Nurse Practitioner in Lubbock, TX · enumerated 2010.

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

National Provider Identifier

1811298458

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Registry record

Entity type Individual (Type 1)

Name Mr. Calvin Clark

Credential RN, MSN, ACNP-BC

Sex Male

Practice address 808 Joliet Ave Unit 220, Lubbock, TX, 79415

Phone (806) 761-0566

Fax (806) 744-7252

Enumeration date Nov 13, 2010

Last updated in NPPES Jan 31, 2019

Taxonomy & licenses

363LA2100X Acute Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 743836 (TX) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Calvin Clark?

Calvin Clark 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.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-01-31.