NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1336116581 MD
Verify on CMS → Chien-Wen Tseng, MD
Family Medicine Physician in Mililani, 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 150,125 in Family Medicine 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
91
Medicare Part D claims · 38 beneficiaries · Family Medicine Physician avg: 4K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
86.3/100
▲ 3 pts above national avg 83.5 · Above neutral
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Chien-Wen Tseng, MD reported a CMS MIPS final score of 86.3/100 - above the 83.5 national average - and filed 91 Medicare Part D claims in 2024.
- 86.3/100
- MIPS score · +3 vs avg
- 91
- Part D claims, 2024
- 88%
- 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.
Federal trust snapshot
What official records show about Chien-Wen Tseng, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1336116581), first enumerated 03/07/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 91 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 86.3/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1336116581 · Family Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · MIPS-INLINE · RX-TRACE · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1336116581
- ENUM-LEGACY 2006
- TAX-MEGA 150K Family Medicine
- MIPS-INLINE 86.3/100
- RX-TRACE 91
- BOOK-LIGHT 701 in Hawaii
- PHOTO-FINISH Mohammed Kaleel · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Tseng · this pro…
Tseng · this provider
86.3 MIPS pts
- Mohammed Kaleel …
Mohammed Kaleel
86.3 MIPS pts
- David Corner · n…
David Corner
86.3 MIPS pts
- Ellen Stehouwer …
Ellen Stehouwer
86.3 MIPS pts
- Jagroop Singh · …
Jagroop Singh
86.3 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Chien-Wen Tseng, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
86 ≥ 49th percentile 49% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Chien-Wen Tseng, MD sits
This provider among family medicine physician peers
Across the 21,266 family medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Chien-Wen Tseng, MD writes more Part D claims than 6% of them and scores higher on MIPS quality than 48% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one family medicine physician peer from a representative sample of 60; the gold marker is Chien-Wen Tseng, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Chien-Wen Tseng, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Chien-Wen Tseng, MD?
High performer (top quartile)Primary specialty
Family Medicine Physician
Medicare Part D claims
91 97% vs specialty avg
MIPS final score
86.3/100 2.8 pts vs avg
Specialty distribution in Hawaii
How Family Medicine Physician compares to other specialties among Hawaii providers
Medicare quality performance, MIPS
Chien-Wen Tseng, MD's 2023 MIPS final score plotted against the Family Medicine Physician national average
- MIPS Final Score
- 86.3/100
- vs 83.5 national avg · 2023 performance year
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 | 1336116581 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 03/07/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
86.2746
Final Score
Measured-score avg: 83.5
82.8779
Quality
71.3709
Cost
100
Promoting Interoperability
Reporting: Group practice
Brand vs generic prescribing mix · Typical
Chien-Wen Tseng, MD - brand share 12.0%
Family Medicine Physician average
12% brand-name claims vs 88% generic, on 91 2024 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 2024.
91
Total Claims
$8K
Total Drug Cost
38
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 165.333
- Total Day Supply
- 4,529
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $7K
- Generic Drug Cost
- $1K
Patient Demographics
- Average Patient Age
- 68.6 years
- Avg HCC Risk Score
- 2.23
- Gender Split
- 39% female / 61% male
Family Medicine Physician Overview
How Chien-Wen Tseng, MD fits within the Family Medicine Physician landscape nationally.
150,125
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,519
Avg Claims per Provider
Chien-Wen Tseng, MD's 91 claims are below the specialty average of 3,519.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Tseng, both outside Hawaii so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (86.3 here).
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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 Tseng.
One of 701 Family Medicine Physician providers enrolled in Hawaii, 5 are shown here.
Dr. Jenifer Aaronson
M.D.
Kamuela, HI
Dr. Sharita Abbott
M.D.
Lahaina, HI
Dr. David Abelson
MD
Kahului, HI
Dr. Alex Aberin
MD
Papaikou, HI
Dr. Danielle Dawn Acacio
MD
Jbphh, HI
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Chien-Wen Tseng, MD's specialty? ▼
Chien-Wen Tseng, MD specializes in Family Medicine Physician and practices in Mililani, Hawaii. Credentials: MD.
How much does Chien-Wen Tseng, MD prescribe under Medicare Part D? ▼
In 2024, Chien-Wen Tseng, MD wrote 91 Medicare Part D claims totaling $8K in drug costs for 38 beneficiaries.
What is Chien-Wen Tseng, MD's Medicare quality score? ▼
Chien-Wen Tseng, MD has a CMS MIPS Final Score of 86.3/100 (Quality: 82.9, Cost: 71.4). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Chien-Wen Tseng, MD located? ▼
Chien-Wen Tseng, MD is located at 95-390 KUAHELANI AVE, Mililani, HI, 96789. Phone: (808) 627-3200.
What is Chien-Wen Tseng, MD's NPI number? ▼
Chien-Wen Tseng, MD's National Provider Identifier (NPI) is 1336116581, issued on 03/07/2006.
Does Chien-Wen Tseng, MD prescribe more brand-name or generic drugs? ▼
Chien-Wen Tseng, MD's prescribing is 12% brand-name and 88% generic drugs by claim count, with $7K in brand drug costs.
How many Family Medicine Physician providers are there in the US? ▼
There are 150,125 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,519 Medicare Part D claims per year.
Does Chien-Wen Tseng, MD accept Medicare? ▼
Chien-Wen Tseng, MD appears in CMS Medicare data with 91 Part D claims and 38 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Chien-Wen Tseng, MD's credentials? ▼
Chien-Wen Tseng, MD's NPI is 1336116581 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
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 (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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 August 2026 (NPPES) / 2024 (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 August 2026.