Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Donald Edward Nicol, MD

Specialist in Honolulu, HI · enumerated 2006 · practices at Gary L. Greenly, D.O., Inc.

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

National Provider Identifier

1053367284

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Donald Edward Nicol

Credential MD

Sex Male

Practice address Honolulu, HI, 96821

Phone (808) 373-2164

Fax (808) 377-9705

Enumeration date May 26, 2006

Last updated in NPPES Jan 22, 2013

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 174400000X (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
1053367284	Other	HI	TRI-CARE
1053367284	Other	HI	AETNA
04242601	Other	HI	ALOHACARE
04242601	Medicaid	HI	-
H0000BDGNM	Other	HI	MEDICARE
0000046870	Other	HI	HMSA

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 Donald Nicol?

Donald Nicol is registered in NPPES with the primary taxonomy of Specialist. 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.

Other providers at this practice address

Browse all →

Gary L. Greenly, D.O., Inc General Practice Physician · Honolulu, HI NPI 1871830794

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-01-22.