NPI registry status
Active
2026 NPPES data Addiction Medicine (Preventive Medicine) Physician NPI 1144742420 MD
Verify on CMS → Jiseung Yoon, MD
Addiction Medicine (Preventive Medicine) Physician in Corona, 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 325 in Addiction Medicine (Preventive 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
26
Medicare Part D claims · Addiction Medicine (Preventive Medicine) Physician avg: 959
MIPS score
85.2/100
▲ 2 pts above national avg 83.1 · Above neutral
Industry payments
$151.79
7 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
Jiseung Yoon, MD reported a CMS MIPS final score of 85.2/100 - above the 83.1 national average - and filed 26 Medicare Part D claims in 2023.
- 85.2/100
- MIPS score · +2 vs avg
- 26
- 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.
Jiseung Yoon, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
85 49th percentile higher than 49% 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 Jiseung Yoon, MD sits
This provider among addiction medicine (preventive medicine) physician peers
Across the 56 addiction medicine (preventive medicine) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Jiseung Yoon, MD writes more Part D claims than 7% of them and scores higher on MIPS quality than 38% - 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 addiction medicine (preventive medicine) physician peer from a representative sample of 55; the gold marker is Jiseung Yoon, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Jiseung Yoon, 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 Jiseung Yoon, MD?
High performer (top quartile)Primary specialty
Addiction Medicine (Preventive Medicine) Physician
Medicare Part D claims
26 97% vs specialty avg
MIPS final score
85.2/100 2.1 pts vs avg
Specialty distribution in California
How Addiction Medicine (Preventive Medicine) Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Jiseung Yoon, MD's 2023 MIPS final score plotted against the Addiction Medicine (Preventive Medicine) Physician national average
- MIPS Final Score
- 85.2/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Addiction Medicine (Preventive Medicine) Physician) - 85.2/100 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).
Jiseung Yoon, MD appears in the CMS NPPES registry as a Addiction Medicine (Preventive Medicine) Physician provider holding MD credentials at 222 W 6TH ST, Corona, CA, 92882, with a listed phone of (909) 485-7974. NPI 1144742420 was issued on 07/08/2017.
Medicare Part D records for calendar year 2023 show 26 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $947 in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 85.2/100 for the 2023 performance year (Quality 71.8, Cost 64.5), compared with the national average of 83.1.
Addiction Medicine (Preventive Medicine) Physician is a narrow specialty nationwide, with 325 enrolled providers across 44 states and an average of 959 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 | 1144742420 |
|---|---|
| Specialty | Addiction Medicine (Preventive Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/08/2017 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
85.186
Final Score
Avg: 83.1
71.8166
Quality
64.5435
Cost
82
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 Jiseung Yoon, MD. Source: openpaymentsdata.cms.gov.
Total received
$152
Largest payer
TREACE MEDICAL CONCEPTS, 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 Jiseung Yoon, MD. To verify Jiseung Yoon, MD'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.
26
Total Claims
$947
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 29
- Total Day Supply
- 766
- Brand Drug Cost
- $0
- Generic Drug Cost
- $947
Patient Demographics
- Average Patient Age
- 50.0 years
- Avg HCC Risk Score
- 1.03
More Addiction Medicine (Preventive Medicine) Physician in CA →
All providers in California →
Compare specialties →
Addiction Medicine (Preventive Medicine) Physician Overview
How Jiseung Yoon, MD fits within the Addiction Medicine (Preventive Medicine) Physician landscape nationally.
325
Addiction Medicine (Preventive Medicine) Physician Providers in US
44
States with Addiction Medicine (Preventive Medicine) Physician
959
Avg Claims per Provider
Jiseung Yoon, MD's 26 claims are below the specialty average of 959.
Nearby Addiction Medicine (Preventive Medicine) Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Yoon.
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 Addiction Medicine (Preventive Medicine) Physician 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 Jiseung Yoon, MD's specialty? ▼
Jiseung Yoon, MD specializes in Addiction Medicine (Preventive Medicine) Physician and practices in Corona, California. Credentials: MD.
How much does Jiseung Yoon, MD prescribe under Medicare Part D? ▼
In 2023, Jiseung Yoon, MD wrote 26 Medicare Part D claims totaling $947 in drug costs for N/A beneficiaries.
What is Jiseung Yoon, MD's Medicare quality score? ▼
Jiseung Yoon, MD has a CMS MIPS Final Score of 85.2/100 (Quality: 71.8, Cost: 64.5). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Jiseung Yoon, MD located? ▼
Jiseung Yoon, MD is located at 222 W 6TH ST, Corona, CA, 92882. Phone: (909) 485-7974.
What is Jiseung Yoon, MD's NPI number? ▼
Jiseung Yoon, MD's National Provider Identifier (NPI) is 1144742420, issued on 07/08/2017.
How many Addiction Medicine (Preventive Medicine) Physician providers are there in the US? ▼
There are 325 Addiction Medicine (Preventive Medicine) Physician providers across 44 states in the US. The average Addiction Medicine (Preventive Medicine) Physician provider writes 959 Medicare Part D claims per year.
Does Jiseung Yoon, MD accept Medicare? ▼
Jiseung Yoon, MD appears in CMS Medicare data with 26 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 Jiseung Yoon, MD's credentials? ▼
Jiseung Yoon, MD's NPI is 1144742420 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 (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.