Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory Scott Sidell, M.D.

Psychiatry Physician in Tacoma, WA · enumerated 2006.

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

National Provider Identifier

1780603530

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Registry record

Entity type Individual (Type 1)

Name Gregory Scott Sidell

Credential M.D.

Sex Male

Practice address 4301 S Pine St Ste 301, Tacoma, WA, 98409

Phone (253) 476-6500

Fax (253) 476-6547

Enumeration date Jul 19, 2006

Last updated in NPPES May 5, 2021

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License MD61058340 (WA) Primary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 01052695A (IN) Secondary

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

Other identifiers

Identifier	Type	State	Issuer
200303280A	Medicaid	IN	-

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 Gregory Sidell?

Gregory Sidell 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 2021-05-05.