NPI registry status
Active
2026 NPPES data Oral & Maxillofacial Surgery (D.M.D.) NPI 1447356597 DDS
Verify on CMS → Chung-Kwan Yen, DDS
Oral & Maxillofacial Surgery (D.M.D.) in Palo Alto, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,116 in Oral & Maxillofacial Surgery (D.M.D.), 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
22
Medicare Part D claims · Oral & Maxillofacial Surgery (D.M.D.) avg: 324
MIPS score
76.5/100
▼ 7 pts below national avg 83.1 · Above neutral
Industry payments
$582.02
4 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Chung-Kwan Yen, DDS reported a CMS MIPS final score of 76.5/100 - below the 83.1 national average - and filed 22 Medicare Part D claims in 2023.
- 76.5/100
- MIPS score · -7 vs avg
- 22
- Part D claims, 2023
- 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.
Chung-Kwan Yen, DDS's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
77 21st percentile higher than 21% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Chung-Kwan Yen, DDS sits
This provider among oral & maxillofacial surgery (d.m.d.) peers
Across the 50 oral & maxillofacial surgery (d.m.d.) providers who report both Medicare Part D prescribing and a MIPS quality score, Chung-Kwan Yen, DDS writes more Part D claims than 12% of them and scores higher on MIPS quality than 12% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one oral & maxillofacial surgery (d.m.d.) peer from a representative sample of 49; the gold marker is Chung-Kwan Yen, DDS. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Chung-Kwan Yen, DDS 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 Chung-Kwan Yen, DDS?
Below national averagePrimary specialty
Oral & Maxillofacial Surgery (D.M.D.)
Medicare Part D claims
22 93% vs specialty avg
MIPS final score
76.5/100 6.6 pts vs avg
Specialty distribution in California
How Oral & Maxillofacial Surgery (D.M.D.) compares to other specialties among California providers
Medicare quality performance, MIPS
Chung-Kwan Yen, DDS's 2023 MIPS final score plotted against the Oral & Maxillofacial Surgery (D.M.D.) national average
- MIPS Final Score
- 76.5/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Oral & Maxillofacial Surgery (D.M.D.)) - 76.5/100 vs national avg 83.1
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).
Chung-Kwan Yen, DDS appears in the CMS NPPES registry as an Oral & Maxillofacial Surgery (D.M.D.) provider holding DDS credentials at 725 WELCH RD, Palo Alto, CA, 94304, with a listed phone of (650) 497-8000. NPI 1447356597 was issued on 09/16/2006.
Medicare Part D records for calendar year 2023 show 22 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $286 in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 76.5/100 for the 2023 performance year (Quality 74.3, Cost 44), compared with the national average of 83.1.
Oral & Maxillofacial Surgery (D.M.D.) is a narrow specialty nationwide, with 1,116 enrolled providers across 52 states and an average of 324 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
Provider Details
| NPI | 1447356597 |
|---|---|
| Specialty | Oral & Maxillofacial Surgery (D.M.D.) |
| Credentials | DDS |
| Gender | Male |
| NPI Issued | 09/16/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
76.5025
Final Score
Avg: 83.1
74.3195
Quality
43.9595
Cost
100
Promoting Interoperability
Reporting: Group practice
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 Chung-Kwan Yen, DDS. Source: openpaymentsdata.cms.gov.
Total received
$582
Largest payer
DePuy Synthes Sales 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.
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Chung-Kwan Yen, DDS. To verify Chung-Kwan Yen, DDS's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
22
Total Claims
$286
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 22
- Total Day Supply
- 259
- Brand Drug Cost
- $0
- Generic Drug Cost
- $286
Patient Demographics
- Average Patient Age
- 74.7 years
- Avg HCC Risk Score
- 1.05
More Oral & Maxillofacial Surgery (D.M.D.) in CA →
All providers in California →
Compare specialties →
Oral & Maxillofacial Surgery (D.M.D.) Overview
How Chung-Kwan Yen, DDS fits within the Oral & Maxillofacial Surgery (D.M.D.) landscape nationally.
1,116
Oral & Maxillofacial Surgery (D.M.D.) Providers in US
52
States with Oral & Maxillofacial Surgery (D.M.D.)
324
Avg Claims per Provider
Chung-Kwan Yen, DDS's 22 claims are below the specialty average of 324.
Nearby Oral & Maxillofacial Surgery (D.M.D.) Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Yen.
Kimiko Agari
Los Angeles, CA
Dr. Yervant Aslanian
DDS MD
Glendale, CA
Dr. Eric Baker
DDS, MD
Dana Point, CA
Dr. Peter Balacky
DDS
Los Angeles, CA
Dr. Daniel Bandary
DDS
Los Angeles, CA
Compare Oral & Maxillofacial Surgery (D.M.D.) nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Oral & Maxillofacial Surgery (D.M.D.) peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Chung-Kwan Yen, DDS's specialty? ▼
Chung-Kwan Yen, DDS specializes in Oral & Maxillofacial Surgery (D.M.D.) and practices in Palo Alto, California. Credentials: DDS.
How much does Chung-Kwan Yen, DDS prescribe under Medicare Part D? ▼
In 2023, Chung-Kwan Yen, DDS wrote 22 Medicare Part D claims totaling $286 in drug costs for N/A beneficiaries.
What is Chung-Kwan Yen, DDS's Medicare quality score? ▼
Chung-Kwan Yen, DDS has a CMS MIPS Final Score of 76.5/100 (Quality: 74.3, Cost: 44). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Chung-Kwan Yen, DDS located? ▼
Chung-Kwan Yen, DDS is located at 725 WELCH RD, Palo Alto, CA, 94304. Phone: (650) 497-8000.
What is Chung-Kwan Yen, DDS's NPI number? ▼
Chung-Kwan Yen, DDS's National Provider Identifier (NPI) is 1447356597, issued on 09/16/2006.
How many Oral & Maxillofacial Surgery (D.M.D.) providers are there in the US? ▼
There are 1,116 Oral & Maxillofacial Surgery (D.M.D.) providers across 52 states in the US. The average Oral & Maxillofacial Surgery (D.M.D.) provider writes 324 Medicare Part D claims per year.
Does Chung-Kwan Yen, DDS accept Medicare? ▼
Chung-Kwan Yen, DDS appears in CMS Medicare data with 22 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Chung-Kwan Yen, DDS's credentials? ▼
Chung-Kwan Yen, DDS's NPI is 1447356597 with credentials DDS. 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.
- 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 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
Compiled from official public sources by the PlainDoctor editorial team.
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.