Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Aaron Llewelyn, M.D.

Anesthesiology Physician in Oklahoma City, OK · enumerated 2014.

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

National Provider Identifier

1912311242

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Registry record

Entity type Individual (Type 1)

Name Dr. Aaron Llewelyn

Credential M.D.

Sex Male

Practice address 750 Ne 13th St, Oac 200, Oklahoma City, OK, 73104

Phone (405) 271-4351

Enumeration date Jun 14, 2014

Last updated in NPPES Jul 16, 2018

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 30711 (OK) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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 Aaron Llewelyn?

Aaron Llewelyn is registered in NPPES with the primary taxonomy of Anesthesiology Physician. 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 2018-07-16.