Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Irwin H. Koff, MD

General Practice Physician in Honolulu, HI · enumerated 2006.

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

National Provider Identifier

1649353517

Verified

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Registry record

Entity type Individual (Type 1)

Name Irwin H. Koff

Credential MD

Sex Male

Practice address 915 N King St, Honolulu, HI, 96817

Phone (808) 848-1438

Enumeration date Oct 23, 2006

Last updated in NPPES Apr 15, 2015

Taxonomy & licenses

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License MD-2352 (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
00X0038302	Other	HI	HMSA BILLING NUMBER
034682-01	Medicaid	HI	-

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

Is NPI 1649353517 active?

Yes, as of the latest NPPES snapshot, NPI 1649353517 is active (record last updated 2015-04-15).

How do I verify Irwin Koff's NPI record?

Cross-check NPI 1649353517 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-04-15.