Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Aaron Douglas Nelson, D.O.

Pain Medicine (Anesthesiology) Physician in Fort Wayne, IN · enumerated 2006.

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

National Provider Identifier

1104900323

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Registry record

Entity type Individual (Type 1)

Name Dr. Aaron Douglas Nelson

Credential D.O.

Sex Male

Practice address Northern Indiana Va Healthcare System, 2121 Lake Ave, Department of Surgery, Fort Wayne, IN, 46805

Phone (260) 426-5431

Enumeration date Oct 24, 2006

Last updated in NPPES Jul 14, 2020

Taxonomy & licenses

207LP2900X Pain Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License 02003040A (IN) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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

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 Aaron Nelson?

Aaron Nelson is registered in NPPES with the primary taxonomy of Pain Medicine (Anesthesiology) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-07-14.