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JOHN J KOO MD INC
NPI 1275826307
Internal Medicine in Kailua, HI

Active since May 23, 2011
640 ULUKAHIKI ST, KAILUA, HI 96734(808) 263-5500 Get Directions Write a Review

NPPES record last updated: May 23, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About John J Koo Md Inc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN J KOO MD INC (NPI 1275826307) is a healthcare organization registered as an internal medicine in Kailua, Hawaii and active in the NPI registry since May 2011. The organization lists John J Koo, Owner, as its authorized official.

NPPES Registry Identity

NPI1275826307
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameJOHN J KOO MD INC
Location Address640 ULUKAHIKI STKailua, HI 96734-4454
Mailing AddressPo Box 25490Honolulu, HI 96825-0490 · (808) 536-0300 · Fax (808) 536-0320
Phone(808) 263-5500
Organization SubpartNo
Authorized OfficialJohn J KooOwner · (808) 352-1981
Enumeration DateMay 23, 2011
✔ NPI 1275826307 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in HI · MD-14092
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedHospitalistTaxonomy 208M00000X · License MD-14092 (HI)
640 ULUKAHIKI ST, Kailua, HI 96734
Open in Google Maps ↗

Other Identifiers 1

Medicaid591041HI

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

John J Koo Md Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to John J Koo MD Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

John Koo, MD
Internal Medicine
NPI 1477617561
12021 WILMINGTON AVE
Los Angeles, CA 90059
(310) 668-4574
✔ PECOS✔ Accepts Medicare2,554 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John J Koo MD Inc's NPI number?

The NPI number for John J Koo MD Inc is 1275826307. It was assigned to this organization in the NPPES registry on May 23, 2011.

Where is John J Koo MD Inc located?

John J Koo MD Inc is located at 640 Ulukahiki St, Kailua, HI 96734. The listed phone number is (808) 263-5500.

What is John J Koo MD Inc's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is John J Koo MD Inc enrolled in Medicare?

Yes. John J Koo MD Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through John J Koo MD Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to John J Koo MD Inc. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for John J Koo MD Inc was last updated on May 23, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.