JAMES MITCHELL DAY M.D.
NPI 1558892059
Internal Medicine in Pearl Harbor, HI

Q: What is James Day's NPI number?

The NPI number for James Day is 1558892059. It was assigned to this individual provider in the NPPES registry on March 26, 2017.

Q: What is James Day's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for James Day was last updated on May 12, 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.

Active since March 26, 2017PECOS EnrolledAccepts Medicare Assignment

480 CENTRAL AVE, PEARL HARBOR, HI 96860(812) 319-2771 Get Directions Write a Review

NPPES record last updated: May 12, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: May 12, 2026, Nov 16, 2025, Oct 31, 2023 and 3 more (6 updates tracked since 2017).

On this page

About James Mitchell Day M.d. NPPES

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

JAMES MITCHELL DAY M.D. (NPI 1558892059) is an individual internal medicine provider in Pearl Harbor, Hawaii, licensed in Indiana (01081159A) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS, is affiliated with Adventist Health Castle, and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (2017).

NPPES Registry Identity

NPI1558892059

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameJAMES MITCHELL DAYCredential: M.D.

Location Address480 CENTRAL AVEPearl Harbor, HI 96860-4908

Mailing Address480 Central AveJbphh, HI 96860-4908 · (812) 319-2771

Phone(812) 319-2771

Sole ProprietorNo

Medical School CMSLoyola University Of Chicago, Stritch School Of MedicineGraduated 2017

Enumeration DateMarch 26, 2017

Last NPPES UpdateMay 12, 20266 updates tracked since enumeration

NPPES CertifiedMay 12, 2026

✔ NPI 1558892059 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in IN · 01081159A

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 ListedMilitary Health Care ProviderTaxonomy 171000000X

Also ListedHospitalistTaxonomy 208M00000X · License MD-P-2023-004 (GU), MC-390 (GU)

480 CENTRAL AVE, Pearl Harbor, HI 96860

Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

James Mitchell 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 ID5193133155

PECOS Enrollment IDI20231002001964

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.

Hospital Affiliations CMS Care Compare 2

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

Adventist Health Castle

Acute Care Hospitals · Kailua, HI

5/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number120006

Location640 Ulukahiki StKailua, HI 96734 · Honolulu County

Emergency services Birthing friendly

Guam Regional Medical City

Acute Care Hospitals · Dededo, GU

OwnershipVoluntary non-profit - Private

CMS Certification Number650003

Location133 Route 3Dededo, GU 96929 · Guam County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 96860 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$136.68 typical visit price

range $60.53 – $180.05

Typical copayment $34.17 (range $15.13 – $45.01)

Most-billed visit code 99204

Established Patient

$105.65 typical visit price

range $20.09 – $147.56

Typical copayment $26.41 (range $5.02 – $36.89)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

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

DR. JOHN KNOREK PH.D.

Psychologist