2026 NPPES data Obstetrics & Gynecology Physician NPI 1861447120 MD
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RENEE SATO, MD

Obstetrics & Gynecology Physician in HONOLULU, 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
417
Medicare Part D claims · 154 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Generic prescribing
81%
generic claims · 19% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

RENEE SATO, MD filed 417 Medicare Part D claims in 2023 as a Obstetrics & Gynecology Physician in HONOLULU, Hawaii, prescribing 81% generic.

417
Part D claims, 2023
81%
generic prescribing

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.

RENEE SATO, MD's Medicare Part D volume vs every U.S. prescriber

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

417 Top 38% higher than 62% 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%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. 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-eligible specialty (heuristic — not verified)

RENEE SATO, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about RENEE SATO, MD?

Quality data not reported

NPI registry status

Active

Issued 05/24/2006

NPI 1861447120

Primary specialty

Obstetrics & Gynecology Physician

Mid-sized

44,313 US NPIs in this specialty

Medicare Part D claims

417 133% vs specialty avg

2023 prescription claims

Specialty avg: 179

Specialty distribution in Hawaii

How Obstetrics & Gynecology Physician compares to other specialties among Hawaii providers

Hawaii providers

Obstetrics & Gynecology Physician share within Hawaii

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

Specialty board-certification context

Estimated specialty board-certified rate — Obstetrics & Gynecology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Obstetrics & Gynecology Physician ABMS/AOA estimate

Est. board-certified rate (Obstetrics & Gynecology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Obstetrics & Gynecology 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).

RENEE SATO, MD appears in the CMS NPPES registry as a Obstetrics & Gynecology Physician provider holding MD credentials at 1380 LUSITANA ST, HONOLULU, HI, 96813, with a listed phone of (808) 531-6727. NPI 1861447120 was issued on 05/24/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SATO 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 417 prescription claims written by this provider, covering 154 Medicare beneficiaries and totaling roughly $97K in drug spend, split 19% brand-name and 81% generic by claim count. 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.

Obstetrics & Gynecology Physician is a mid-sized specialty nationwide, with 44,313 enrolled providers across 56 states and an average of 179 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

1380 LUSITANA ST
HONOLULU, HI 96813

Provider Details

NPI 1861447120
Specialty Obstetrics & Gynecology Physician
Credentials MD
Gender Female
NPI Issued 05/24/2006

Brand vs generic prescribing mix · Typical

RENEE SATO, MD — brand share 19.0%
Specialty average (est.)

19% brand-name claims vs 81% generic, on 417 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.

417
Total Claims
$97K
Total Drug Cost
154
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,030
Total Day Supply
28,986
Brand vs Generic
19% brand / 81% generic
Brand Drug Cost
$79K
Generic Drug Cost
$17K
Antibiotic Claims
24

Patient Demographics

Average Patient Age
73.9 years
Avg HCC Risk Score
0.85
Gender Split
100% female / 0% male

Top Prescribed Drugs (Medicare Part D)

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

What RENEE SATO, 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
Alendronate Sodium
100
Prolia
Denosumab
35
Triamcinolone Acetonide
35
Estradiol
33
Raloxifene Hcl
32
Valacyclovir
Valacyclovir Hcl
24
Acyclovir
21
Solifenacin Succinate
16
Nitrofurantoin Mono-Macro
Nitrofurantoin Monohyd/M-Cryst
12
Yuvafem
Estradiol
11

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

Obstetrics & Gynecology Physician Overview

How RENEE SATO, MD fits within the Obstetrics & Gynecology Physician landscape nationally.

44,313
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider

RENEE SATO, MD's 417 claims are above the specialty average of 179.

Nearby Obstetrics & Gynecology Physician Providers in Hawaii

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

Compare Obstetrics & Gynecology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is RENEE SATO, MD's specialty?
RENEE SATO, MD specializes in Obstetrics & Gynecology Physician and practices in HONOLULU, Hawaii. Credentials: MD.
How much does RENEE SATO, MD prescribe under Medicare Part D?
In 2023, RENEE SATO, MD wrote 417 Medicare Part D claims totaling $97K in drug costs for 154 beneficiaries.
Where is RENEE SATO, MD located?
RENEE SATO, MD is located at 1380 LUSITANA ST, HONOLULU, HI, 96813. Phone: (808) 531-6727.
What is RENEE SATO, MD's NPI number?
RENEE SATO, MD's National Provider Identifier (NPI) is 1861447120, issued on 05/24/2006.
Does RENEE SATO, MD prescribe more brand-name or generic drugs?
RENEE SATO, MD's prescribing is 19% brand-name and 81% generic drugs by claim count, with $79K in brand drug costs.
How many Obstetrics & Gynecology Physician providers are there in the US?
There are 44,313 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 179 Medicare Part D claims per year.
What drugs does RENEE SATO, MD prescribe most often?
Based on 2023 Medicare Part D data, RENEE SATO, MD's most frequently prescribed drugs include Alendronate Sodium, Prolia, Triamcinolone Acetonide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does RENEE SATO, MD accept Medicare?
RENEE SATO, MD appears in CMS Medicare data with 417 Part D claims and 154 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify RENEE SATO, MD's credentials?
RENEE SATO, MD's NPI is 1861447120 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