2026 NPPES data Family Medicine Physician NPI 1619075769 MD
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MASAKI TAKAI, MD

Family Medicine Physician in WAIPAHU, Hawaii. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
5K
Medicare Part D claims · 599 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

MASAKI TAKAI, MD filed 4,564 Medicare Part D claims in 2023 as a Family Medicine Physician in WAIPAHU, Hawaii, prescribing 90% generic.

5K
Part D claims, 2023
90%
generic prescribing
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

MASAKI TAKAI, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

4,564 Top 7% higher than 93% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

MASAKI TAKAI, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about MASAKI TAKAI, MD?

Quality data not reported

NPI registry status

Active

Issued 09/20/2006

NPI 1619075769

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

4,564 34% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in Hawaii

How Family Medicine Physician compares to other specialties among Hawaii providers

Hawaii providers

Family Medicine Physician share within Hawaii

1. Family Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Family Medicine Physician share within Hawaii

Specialty board-certification context

Estimated specialty board-certified rate — Family Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Family Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Family Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Family Medicine Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

MASAKI TAKAI, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at 94-1480 MOANIANI ST, WAIPAHU, HI, 96797, with a listed phone of (808) 432-3100. NPI 1619075769 was issued on 09/20/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what TAKAI most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 4,564 prescription claims written by this provider, covering 599 Medicare beneficiaries and totaling roughly $221K in drug spend, split 10% brand-name and 90% generic by claim count, with an opioid prescribing rate of 3.3%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

94-1480 MOANIANI ST
WAIPAHU, HI 96797

Provider Details

NPI 1619075769
Specialty Family Medicine Physician
Credentials MD
Gender Male
NPI Issued 09/20/2006

Hospital and facility affiliations

Facilities where MASAKI TAKAI, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

HAWAII PERMANENTE MEDICAL GROUP INC
HONOLULU, HI

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Brand vs generic prescribing mix · Typical

MASAKI TAKAI, MD — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 4,564 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

4,564
Total Claims
$221K
Total Drug Cost
599
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
11,667
Total Day Supply
341,418
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$150K
Generic Drug Cost
$69K
Opioid Claims
152 (3.3% rate)
Antibiotic Claims
69

Patient Demographics

Average Patient Age
75.4 years
Avg HCC Risk Score
1.28
Gender Split
49% female / 51% male
Age Distribution
<65: 31, 65-74: 240, 75-84: 243, 85+: 85

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What MASAKI TAKAI, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Atorvastatin Calcium
611
Lisinopril
333
Amlodipine Besylate
191
Losartan Potassium
170
Simvastatin
146
Metformin Hcl
144
Allopurinol
143
Atenolol
117
Levothyroxine Sodium
113
Tamsulosin Hcl
107

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Family Medicine Physician Overview

How MASAKI TAKAI, MD fits within the Family Medicine Physician landscape nationally.

147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

MASAKI TAKAI, MD's 4,564 claims are above the specialty average of 3,418.

Nearby Family Medicine Physician Providers in Hawaii

Other clinicians with the same primary specialty enrolled in Hawaii, drawn from the same CMS NPPES roster as TAKAI.

Compare Family Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is MASAKI TAKAI, MD's specialty?
MASAKI TAKAI, MD specializes in Family Medicine Physician and practices in WAIPAHU, Hawaii. Credentials: MD.
How much does MASAKI TAKAI, MD prescribe under Medicare Part D?
In 2023, MASAKI TAKAI, MD wrote 4,564 Medicare Part D claims totaling $221K in drug costs for 599 beneficiaries.
Where is MASAKI TAKAI, MD located?
MASAKI TAKAI, MD is located at 94-1480 MOANIANI ST, WAIPAHU, HI, 96797. Phone: (808) 432-3100.
What is MASAKI TAKAI, MD's NPI number?
MASAKI TAKAI, MD's National Provider Identifier (NPI) is 1619075769, issued on 09/20/2006.
Does MASAKI TAKAI, MD prescribe more brand-name or generic drugs?
MASAKI TAKAI, MD's prescribing is 10% brand-name and 90% generic drugs by claim count, with $150K in brand drug costs.
Does MASAKI TAKAI, MD prescribe opioids?
Yes, MASAKI TAKAI, MD had 152 opioid claims in 2023 with an opioid prescribing rate of 3.3%.
How many Family Medicine Physician providers are there in the US?
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does MASAKI TAKAI, MD prescribe most often?
Based on 2023 Medicare Part D data, MASAKI TAKAI, MD's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MASAKI TAKAI, MD accept Medicare?
MASAKI TAKAI, MD appears in CMS Medicare data with 4,564 Part D claims and 599 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MASAKI TAKAI, MD's credentials?
MASAKI TAKAI, MD's NPI is 1619075769 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology