Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Y. Dunn, M.D.

Diagnostic Radiology Physician in Honolulu, HI · enumerated 2007.

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

National Provider Identifier

1700901212

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Y. Dunn

Credential M.D.

Sex Male

Practice address 321 N Kuakini St, Room 405, Honolulu, HI, 96817

Phone (808) 522-0190

Fax (808) 523-9068

Enumeration date Mar 21, 2007

Last updated in NPPES Jan 18, 2011

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A84927 (CA) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License A84927 (CA) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License MD15853 (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
64773701	Medicaid	HI	-
MD15853	Other	HI	QUEENS HEALTHCARE
990157698	Other	HI	HMAA
00A849270	Medicaid	CA	-
0295865	Other	HI	HMSA/HMSA QUEST
0429291089	Other	HI	UHA
1082145098	Other	HI	AETNA
64773702	Medicaid	HI	-
103802483	Other	HI	US MARSHALL SVC-FED DET
20124380	Other	HI	US DEPT OF LABOR
A0295863	Other	HI	HMSA/HMSA QUEST

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 Gregory Dunn?

Gregory Dunn is registered in NPPES with the primary taxonomy of Diagnostic Radiology 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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Stuart Sugihara Pulmonary Disease Physician · Honolulu, HI NPI 1013911734 Roland C K Ng MD Inc Nephrology Physician · Honolulu, HI NPI 1801892039 Mari Otsuka Internal Medicine Physician · Honolulu, HI NPI 1538165188 Clive Otsuka Internal Medicine Physician · Honolulu, HI NPI 1447256094 Roland Ng Nephrology Physician · Honolulu, HI NPI 1346247558 Melvin Yee Neurology Physician · Honolulu, HI NPI 1124026455 Kevin Kimata Neurology Physician · Honolulu, HI NPI 1598763781 Steven Azuma Cardiovascular Disease Physician · Honolulu, HI NPI 1518966233

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-01-18.