NPI registry status
Active
2026 NPPES data Obstetrics & Gynecology Physician NPI 1982845681 D.O.
Verify on CMS → Cheryl Twu, D.O.
Obstetrics & Gynecology Physician in Honolulu, Hawaii.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 44,326 in Obstetrics & Gynecology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
214
Medicare Part D claims · 76 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Generic prescribing
78%
generic claims · 22% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$118.31
5 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Cheryl Twu, D.O. filed 214 Medicare Part D claims in 2023 as an Obstetrics & Gynecology Physician in Honolulu, Hawaii, prescribing 78% generic.
- 214
- Part D claims, 2023
- 78%
- generic prescribing
- $118.31
- industry payments (Sunshine Act)
- ≥49th
- pct by Part D claim volume (lower-bound band)
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.
CMS NPPES provider registry desk
NPI 1982845681 · Obstetrics & Gynecology Physician
NPI-10 · ENUM-MID · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1982845681
- ENUM-MID 2009
- TAX-MID 44K Obstetrics &
- RX-LIGHT 214
- BOOK-THIN 287 in Hawaii
- PHOTO-ENUM Tiffany Bolden-Watkins · 2009
Cheryl Twu, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
214 ≥ 49th percentile 49% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Cheryl Twu, D.O. 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 Cheryl Twu, D.O.?
Quality data not reportedPrimary specialty
Obstetrics & Gynecology Physician
Medicare Part D claims
214 20% vs specialty avg
Specialty distribution in Hawaii
How Obstetrics & Gynecology Physician compares to other specialties among Hawaii providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Obstetrics & Gynecology Physician. Verify directly:
How MIPS and board certification work
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).
Practice Address
Provider Details
| NPI | 1982845681 |
|---|---|
| Specialty | Obstetrics & Gynecology Physician |
| Credentials | D.O. |
| Gender | Female |
| NPI Issued | 03/10/2009 |
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Cheryl Twu, D.O.. Source: openpaymentsdata.cms.gov.
Total received
$118
Largest payer
Astellas Pharma US Inc
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Typical
Cheryl Twu, D.O. - brand share 22.0%
Obstetrics & Gynecology Physician average
22% brand-name claims vs 78% generic, on 214 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.
214
Total Claims
$36K
Total Drug Cost
76
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 495
- Total Day Supply
- 13,933
- Brand vs Generic
- 22% brand / 78% generic
- Brand Drug Cost
- $26K
- Generic Drug Cost
- $10K
- Antibiotic Claims
- 13
Patient Demographics
- Average Patient Age
- 72.1 years
- Avg HCC Risk Score
- 1.10
- 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 Cheryl Twu, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Estradiol
Estradiol
33 claims
- Clotrimazole-Betam…
Clotrimazole-Betamethasone
14 claims
- Estradiol (Once We… 12
Estradiol (Once Weekly)
12 claims
- Valacyclovir 12
Valacyclovir
12 claims
- Yuvafem 12
Yuvafem
12 claims
| Drug | Claims |
|---|---|
| Estradiol | 33 |
| Clotrimazole-Betamethasone Clotrimazole/Betamethasone Dip | 14 |
| Estradiol (Once Weekly) Estradiol | 12 |
| Valacyclovir Valacyclovir Hcl | 12 |
| Yuvafem Estradiol | 12 |
| Premarin "Estrogens | N/A |
| Progesterone "Progesterone | N/A |
* 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 Cheryl Twu, D.O. fits within the Obstetrics & Gynecology Physician landscape nationally.
44,326
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider
Cheryl Twu, D.O.'s 214 claims are above the specialty average of 179.
Nationwide Obstetrics & Gynecology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Twu, both outside Hawaii so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2009)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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 Twu.
One of 287 Obstetrics & Gynecology Physician providers enrolled in Hawaii, 5 are shown here.
Dr. Michael Aaronoff
MD
Waipahu, HI
Dr. Celeste Adrian
M.D.
Wailuku, HI
Dr. Tod Aeby
MD
Honolulu, HI
Dr. Aaron Altura
M.D.
Wailuku, HI
Dr. Elenita Alvarez
MD
Honolulu, HI
Compare Obstetrics & Gynecology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Cheryl Twu, D.O.'s specialty? ▼
Cheryl Twu, D.O. specializes in Obstetrics & Gynecology Physician and practices in Honolulu, Hawaii. Credentials: D.O..
How much does Cheryl Twu, D.O. prescribe under Medicare Part D? ▼
In 2023, Cheryl Twu, D.O. wrote 214 Medicare Part D claims totaling $36K in drug costs for 76 beneficiaries.
Where is Cheryl Twu, D.O. located? ▼
Cheryl Twu, D.O. is located at 1441 KAPIOLANI BLVD STE 1005, Honolulu, HI, 96814. Phone: (808) 900-4554.
What is Cheryl Twu, D.O.'s NPI number? ▼
Cheryl Twu, D.O.'s National Provider Identifier (NPI) is 1982845681, issued on 03/10/2009.
Does Cheryl Twu, D.O. prescribe more brand-name or generic drugs? ▼
Cheryl Twu, D.O.'s prescribing is 22% brand-name and 78% generic drugs by claim count, with $26K in brand drug costs.
How many Obstetrics & Gynecology Physician providers are there in the US? ▼
There are 44,326 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 Cheryl Twu, D.O. prescribe most often? ▼
Based on 2023 Medicare Part D data, Cheryl Twu, D.O.'s most frequently prescribed drugs include Estradiol, Clotrimazole-Betamethasone, Estradiol (Once Weekly). This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Cheryl Twu, D.O. accept Medicare? ▼
Cheryl Twu, D.O. appears in CMS Medicare data with 214 Part D claims and 76 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Cheryl Twu, D.O.'s credentials? ▼
Cheryl Twu, D.O.'s NPI is 1982845681 with credentials D.O.. 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
View source datasets and methodology notes
- 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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.