Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Aaron Greenwald

Psychiatry Physician in Augusta, ME · enumerated 2005.

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

National Provider Identifier

1083605992

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Registry record

Entity type Individual (Type 1)

Name Aaron Greenwald

Sex Male

Practice address 1 Va Ctr, Augusta, ME, 04330

Phone (207) 623-8411

Enumeration date Oct 31, 2005

Last updated in NPPES Nov 2, 2023

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 016516 (ME) Primary

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.

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Frequently asked questions

What specialty is Aaron Greenwald?

Aaron Greenwald is registered in NPPES with the primary taxonomy of Psychiatry 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 2023-11-02.