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DR. LARRY DAY M.D.
NPI 1316999220
Specialist in Honolulu, HI

Active since May 17, 2006PECOS EnrolledAccepts Medicare Assignment
3675 KILAUEA AVE, 5TH FLOOR, HONOLULU, HI 96816(808) 737-2751(808) 735-7047 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Larry Day M.d. NPPES

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

DR. LARRY DAY M.D. (NPI 1316999220) is an individual specialist in Honolulu, Hawaii, licensed in Hawaii (MD12536) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with The Queens Medical Center, and is a graduate of Medical College Of Georgia School Of Medicine (1998).

NPPES Registry Identity

NPI1316999220
Entity TypeIndividualMale
Primary Taxonomy174400000X
Provider Legal NameDR. LARRY DAYCredential: M.D.
Location Address3675 KILAUEA AVE, 5TH FLOORHonolulu, HI 96816-2333
Mailing Address677 Ala Moana Blvd, Suite 1025Honolulu, HI 96813-5419 · (808) 535-5975 · Fax (808) 535-5976
Phone(808) 737-2751
Fax(808) 735-7047
Sole ProprietorNo
Medical School CMSMedical College Of Georgia School Of MedicineGraduated 1998
Enumeration DateMay 17, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1316999220 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in HI · MD12536
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
3675 KILAUEA AVE, Honolulu, HI 96816
Open in Google Maps ↗

Other Identifiers 2

Medicaid540824-02HI
Medicaid540824-01HI

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Larry Day M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9638064157
PECOS Enrollment IDI20040216000300
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Larry Day reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The Queens Medical Center
0.9 mi
Urgent Care
449 KAPAHULU AVENUE, SUITE 104
Honolulu, HI 96815
  • Reassigned Medicare billing, Hawaii enrollment
  • 809 clinicians in this Medicare group
NPI 1033753025 (808) 735-0007
Queens University Medical Group
4.1 mi
Multi-Specialty
1301 PUNCHBOWL ST
Honolulu, HI 96813
  • Reassigned Medicare billing, Hawaii enrollment
  • 859 clinicians in this Medicare group
NPI 1891441382 (808) 691-1000

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

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
61 services61 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
13 services13 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

The Queens Medical Center

Acute Care Hospitals · Honolulu, HI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number120001
Location1301 Punchbowl StHonolulu, HI 96813 · Honolulu County
Emergency services Birthing friendly

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. VICTOR VALCOUR M.D.
Specialist
3675 KILAUEA AVE
HONOLULU, HI 96816
Honolulu County (808) 737-2751
LEAHI HOSPITAL
Long Term Care Hospital
3675 KILAUEA AVE
HONOLULU, HI 96816
Honolulu County (808) 832-6147
STEPHANIE OAKLEY RN
Registered Nurse
3675 KILAUEA AVE
HONOLULU, HI 96816
Honolulu County (808) 972-6892
LEAHI HOSPITAL
General Acute Care Hospital
3675 KILAUEA AVE
HONOLULU, HI 96816
Honolulu County (808) 733-7932
LEAHI HOSPITAL
Nursing Facility/Intermediate Care Facility
3675 KILAUEA AVE
HONOLULU, HI 96816
Honolulu County (808) 733-7932
LEAHI HOSPITAL
Nursing Facility/Intermediate Care Facility
3675 KILAUEA AVE
HONOLULU, HI 96816
Honolulu County (808) 733-7932
DR. LORI KAMEMOTO
Specialist
3675 KILAUEA AVE, 5TH FLOOR
HONOLULU, HI 96816
Honolulu County (808) 737-2751
EMERGENCY MEDICAL SERVICES SYSTEM HAWAII DEPT OF HEALTH
Ambulance (Land Transport)
3675 KILAUEA AVE, TROTTER BUILDING BASEMENT
HONOLULU, HI 96816
Honolulu County (808) 733-9215

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 Larry Day's NPI number?

The NPI number for Larry Day is 1316999220. It was assigned to this individual provider in the NPPES registry on May 17, 2006.

Where is Larry Day located?

Larry Day practices at 3675 Kilauea Ave 5th Floor, Honolulu, HI 96816. The listed phone number is (808) 737-2751.

What is Larry Day's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Larry Day enrolled in Medicare?

Yes. Larry Day is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Larry Day's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Larry Day reassigns Medicare benefits to 2 organizations: The Queens Medical Center (Honolulu, HI) and Queens University Medical Group (Honolulu, HI). Each 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 Larry Day's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Larry Day affiliated with any hospitals?

According to CMS data, Larry Day is affiliated with The Queens Medical Center.

When was this NPI record last updated?

The NPPES record for Larry Day was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.