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Internal Medicine Providers in Wailuku, HI

Browse 39 Internal Medicine providers listed in NPPES with a practice address in Wailuku, Hawaii.

39 Healthcare Providers

How Wailuku compares with the U.S.

Wailuku has 230 clinicians in Internal Medicine per 100,000 residents, 5.2 times the U.S. rate of 44.

That is 39 active clinicians in Internal Medicine with a practice address in Wailuku, for a population of 16,926.

The Hawaii rate is 62 per 100,000 residents.

What these numbers mean

Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.

A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.

City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places. Cities with hospitals or large medical centers often list more specialists than the number of residents alone would suggest, because patients also come from nearby areas.

95% of clinicians in Internal Medicine in Wailuku listed in the CMS Medicare file (21 of 22) accept Medicare assignment. That is similar to the Hawaii share of 96%.

What is Medicare assignment?

A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.

Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.

23% of clinicians in Internal Medicine in Wailuku listed in the CMS Medicare file (5 of 22) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is lower than the Hawaii share of 40%.

About the telehealth indicator

The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.

These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.

Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com ยท Methodology

Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

Internal Medicine Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine practitioners in Wailuku, HI

Source: CMS PECOS
PECOS Enrolled Specialists 30 In Wailuku, HI
Part B Lab & Imaging Eligible 30 Diagnostic Referrals
DME Ordering Eligible 31 Durable Medical Equipment
Home Health Agency Referrals 30 HHA Ordering Eligible
Showing 1โ€“20 of 39 providers
With recent CMS data first, then Aโ€“Z

Dr. Insaf Ally , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
2180 Main St, Wailuku, HI 967931625
Phone: 8082426464
NPI Identifier 1750635801
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Dr. Nolan Arruda , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
2180 Main St, Wailuku, HI 967931625
Phone: 8082426464
NPI Identifier 1043242209
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Deeva Berera

Internal Medicine

Active NPI Status Accepts Medicare Assignment
55 Maui Lani Pkwy, Wailuku, HI 967932416
Phone: 8082436050
NPI Identifier 1902268246
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Dr. Daniel Garcia , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
2180 Main St, Wailuku, HI 967931625
Phone: 8082426464
NPI Identifier 1689699449
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Dr. Paul W. Grandon , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
55 Maui Lani Pkwy, Wailuku, HI 967932416
Phone: 8082436050
NPI Identifier 1215908959
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Dr. Arpana Gupta , MD

Internal Medicine

Active NPI Status
2180 Main St, Wailuku, HI 967931625
Phone: 8082426464
NPI Identifier 1285668624
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Dr. Ritu Gupta , DO

Internal Medicine

Active NPI Status
2180 Main St, Wailuku, HI 967931625
Phone: 8082426464
NPI Identifier 1720374788
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Dr. Kristen Gutermuth , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
2180 Main St, Wailuku, HI 967931666
Phone: 8082426464
NPI Identifier 1558386243
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Dr. Karin M Halvorson , MD

Internal Medicine

Active NPI Status
221 Mahalani St, Wailuku, HI 967932526
Phone: 8082449056
NPI Identifier 1326201625
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Dr. Sonya Hansen , MD

Internal Medicine

Active NPI Status
24 N Church St, Suite 403, Wailuku, HI 967931680
Phone: 8083851856
NPI Identifier 1801110119
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Dr. Heather Haynes , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
95 Mahalani St, Rm 21, Wailuku, HI 96793
Phone: 8082444647
NPI Identifier 1487664587
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Dr. Jeffrey M Hirschberg , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
2180 Main St, Wailuku, HI 967931625
Phone: 8082426464
NPI Identifier 1184821761
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Dr. Anna Hom , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
2180 Main St, Wailuku, HI 967931625
Phone: 8082426464
NPI Identifier 1063421733
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Dr. Pamela D. Hope , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
55 Maui Lani Pkwy, Wailuku, HI 967932416
Phone: 8082436050
NPI Identifier 1003908757
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Dr. Christopher M. Howard , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
80 Mahalani St, Wailuku, HI 967932531
Phone: 8082436000
NPI Identifier 1104926948
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Dr. Joseph K Kamaka , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
99 South Market Street, Wailuku, HI 96793
Phone: 8082445551
NPI Identifier 1023042603
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Dr. David A. Kato , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
221 Mahalani St, Wailuku, HI 967932526
Phone: 8082449056
NPI Identifier 1194018895
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Dr. Tigist Nigatu Mammo , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1881 Nani St, Wailuku, HI 967931811
Phone: 8088717772
NPI Identifier 1194923961
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Dr. William Mitchell , MD

Internal Medicine

Active NPI Status
2180 Main St, Wailuku, HI 967931666
Phone: 8082426464
NPI Identifier 1972527877
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Dr. Constantin Novoselsky , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
221 Mahalani St, Wailuku, HI 967932526
Phone: 8084425503
NPI Identifier 1861650764
View Full Profile

Frequently Asked Questions about Internal Medicine in Wailuku

How do I check a Internal Medicine practitioner's license?

Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the Hawaii licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.

Why is a practitioner missing from this list?

This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.