Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Greg K. Sakamoto, MD

Dermatology Physician in Honolulu, HI · enumerated 2007.

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

National Provider Identifier

1639205396

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Registry record

Entity type Individual (Type 1)

Name Dr. Greg K. Sakamoto

Credential MD

Sex Male

Practice address 550 S Beretania St, Suite 603, Honolulu, HI, 96813

Phone (808) 447-7454

Fax (808) 447-7456

Enumeration date Feb 26, 2007

Last updated in NPPES Jan 23, 2012

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 14900 (HI) Primary

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
DF520A	Other	HI	MEDICARE PTAN

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 is the NPI number for Greg Sakamoto?

The National Provider Identifier (NPI) for Greg Sakamoto is 1639205396, a Type 1 (individual) record in the CMS NPPES registry.

Where does Greg Sakamoto practice?

The practice location on file with NPPES is in Honolulu, HI. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-01-23.