NPI registry status
Active
2026 NPPES data Geriatric Psychiatry Physician NPI 1104838440 M.D.
Verify on CMS → Sung Cheon, M.D.
Geriatric Psychiatry Physician in Waukegan, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 787 in Geriatric Psychiatry 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
2K
Medicare Part D claims · 95 beneficiaries · Geriatric Psychiatry Physician avg: 2K
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Sung Cheon, M.D. filed 1,979 Medicare Part D claims in 2024 as a Geriatric Psychiatry Physician in Waukegan, Illinois, prescribing 95% generic.
- 2K
- Part D claims, 2024
- 95%
- generic prescribing
- ≥83rd
- 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.
Federal trust snapshot
What official records show about Sung Cheon, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1104838440), first enumerated 08/13/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,979 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- State context
State board disciplinary context
Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not Sung Cheon, M.D.'s individual license status. Verify directly with the state medical board.
Source: IDFPR annual report 2023
- 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 1104838440 · Geriatric Psychiatry Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1104838440
- ENUM-LEGACY 2006
- TAX-NARROW 787
- RX-MID 1,979
- BOOK-THIN 17 in Illinois
- PHOTO-ENUM Kalu Agwu, MD · 2006
Sung Cheon, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
1,979 ≥ 83rd percentile 83% of 1,416,883 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 · 2024
◑
Board-eligible specialty (heuristic, not verified)
Sung Cheon, M.D. 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 Sung Cheon, M.D.?
Quality data not reportedPrimary specialty
Geriatric Psychiatry Physician
Medicare Part D claims
1,979 25% vs specialty avg
Specialty distribution in Illinois
How Geriatric Psychiatry Physician compares to other specialties among Illinois 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 Geriatric Psychiatry 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 | 1104838440 |
|---|---|
| Specialty | Geriatric Psychiatry Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 08/13/2006 |
License & disciplinary context - Illinois IDFPR 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 ~42K Illinois medical licensees in 2023 - they are NOT specific to Sung Cheon, M.D.. To verify Sung Cheon, M.D.'s current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR 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 Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Sung Cheon, M.D. - brand share 5.0%
Geriatric Psychiatry Physician average
5% brand-name claims vs 95% generic, on 1,979 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.
1,979
Total Claims
$310K
Total Drug Cost
95
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,393.933
- Total Day Supply
- 70,856
- Brand vs Generic
- 5% brand / 95% generic
- Brand Drug Cost
- $239K
- Generic Drug Cost
- $72K
Patient Demographics
- Average Patient Age
- 53.3 years
- Avg HCC Risk Score
- 0.95
- Gender Split
- 46% female / 54% male
- Age Distribution
- <65: 68, 65-74: 23, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Sung Cheon, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Buspirone Hcl
Buspirone Hcl
188 claims
- Clonazepam
Clonazepam
177 claims
- Risperidone
Risperidone
123 claims
- Trazodone Hcl
Trazodone Hcl
109 claims
- Sertraline Hcl
Sertraline Hcl
100 claims
- Olanzapine
Olanzapine
77 claims
- Divalproex Sodium 75
Divalproex Sodium
75 claims
- Divalproex Sodium Er 61
Divalproex Sodium Er
61 claims
| Drug | Claims |
|---|---|
| Buspirone Hcl | 188 |
| Clonazepam | 177 |
| Risperidone | 123 |
| Trazodone Hcl | 109 |
| Sertraline Hcl | 100 |
| Olanzapine | 77 |
| Divalproex Sodium | 75 |
| Divalproex Sodium Er Divalproex Sodium | 61 |
| Aripiprazole | 59 |
| Lorazepam | 59 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Geriatric Psychiatry Physician Overview
How Sung Cheon, M.D. fits within the Geriatric Psychiatry Physician landscape nationally.
787
Geriatric Psychiatry Physician Providers in US
46
States with Geriatric Psychiatry Physician
1,586
Avg Claims per Provider
Sung Cheon, M.D.'s 1,979 claims are above the specialty average of 1,586.
Nationwide Geriatric Psychiatry Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Cheon, both outside Illinois so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Geriatric Psychiatry Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Cheon.
One of 17 Geriatric Psychiatry Physician providers enrolled in Illinois, 5 are shown here.
Dr. Mehrdad Abbassian
M.D.
Westmont, IL
Dr. Olusola Ajilore
M.D.
Chicago, IL
Dr. Zafeer Berki
MD
Hinsdale, IL
Dr. Sanford Finkel
M.D.
Wilmette, IL
Seetal Kakumani
MBBS
Springfield, IL
Compare Geriatric Psychiatry Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Sung Cheon, M.D.'s specialty? ▼
Sung Cheon, M.D. specializes in Geriatric Psychiatry Physician and practices in Waukegan, Illinois. Credentials: M.D..
How much does Sung Cheon, M.D. prescribe under Medicare Part D? ▼
In 2024, Sung Cheon, M.D. wrote 1,979 Medicare Part D claims totaling $310K in drug costs for 95 beneficiaries.
Where is Sung Cheon, M.D. located? ▼
Sung Cheon, M.D. is located at 2400 BELVIDERE RD, Waukegan, IL, 60085. Phone: (847) 377-8779.
What is Sung Cheon, M.D.'s NPI number? ▼
Sung Cheon, M.D.'s National Provider Identifier (NPI) is 1104838440, issued on 08/13/2006.
Does Sung Cheon, M.D. prescribe more brand-name or generic drugs? ▼
Sung Cheon, M.D.'s prescribing is 5% brand-name and 95% generic drugs by claim count, with $239K in brand drug costs.
How many Geriatric Psychiatry Physician providers are there in the US? ▼
There are 787 Geriatric Psychiatry Physician providers across 46 states in the US. The average Geriatric Psychiatry Physician provider writes 1,586 Medicare Part D claims per year.
What drugs does Sung Cheon, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Sung Cheon, M.D.'s most frequently prescribed drugs include Buspirone Hcl, Clonazepam, Risperidone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Sung Cheon, M.D. accept Medicare? ▼
Sung Cheon, M.D. appears in CMS Medicare data with 1,979 Part D claims and 95 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Sung Cheon, M.D.'s credentials? ▼
Sung Cheon, M.D.'s NPI is 1104838440 with credentials M.D.. 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.
- 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.