NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1699765230 M.D.
Verify on CMS → John Choi, M.D.
Ophthalmology Physician in Warrenville, 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 22,388 in Ophthalmology 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
1K
Medicare Part D claims · 240 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
69%
generic claims · 31% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
75/100
CMS neutral threshold · no category scores published
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
John Choi, M.D. carries the neutral CMS MIPS final score of 75/100, assigned where no category was scored - and filed 1,025 Medicare Part D claims in 2024.
- 75/100
- CMS neutral score · not measured
- 1K
- Part D claims, 2024
- 69%
- 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 John Choi, 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 1699765230), first enumerated 10/25/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,025 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)
CMS assigned a neutral MIPS final score of 75/100 where no performance category was scored — not a measured quality rank.
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.
- State context
State board disciplinary context
Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not John Choi, 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 1699765230 · Ophthalmology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-NEUTRAL · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1699765230
- ENUM-LEGACY 2005
- TAX-MID 22K Ophthalmology Physician
- MIPS-NEUTRAL 75/100
- RX-MID 1,025
- BOOK-LIGHT 891 in Illinois
- PHOTO-ENUM Robert Mittra, MD · 2005
John Choi, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
1,025 ≥ 75th percentile 75% 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 certification likely (heuristic, not verified)
John Choi, M.D. 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 John Choi, M.D.?
CMS neutral score, not measuredPrimary specialty
Ophthalmology Physician
Medicare Part D claims
1,025 31% vs specialty avg
MIPS final score
75/100
Specialty distribution in Illinois
How Ophthalmology Physician compares to other specialties among Illinois providers
MIPS score not measured
CMS assigned a neutral 75/100 threshold
CMS did not publish any Quality, Cost, Promoting Interoperability, or Improvement Activities category score for this clinician. This administrative threshold is not comparable with the national average of clinicians whose MIPS score was measured.
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 | 1699765230 |
|---|---|
| Specialty | Ophthalmology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 10/25/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
75
Final Score
CMS neutral threshold · not measured
Reporting: Individual
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 John Choi, M.D.. To verify John Choi, 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 · Above average
John Choi, M.D. - brand share 31.0%
Ophthalmology Physician average
31% brand-name claims vs 69% generic, on 1,025 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.
1,025
Total Claims
$159K
Total Drug Cost
240
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,375.867
- Total Day Supply
- 30,621
- Brand vs Generic
- 31% brand / 69% generic
- Brand Drug Cost
- $141K
- Generic Drug Cost
- $18K
- Opioid Claims
- 23 (2.2% rate)
- Antibiotic Claims
- 82
Patient Demographics
- Average Patient Age
- 75.4 years
- Avg HCC Risk Score
- 1.04
- Gender Split
- 67% female / 33% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What John Choi, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Erythromycin
Erythromycin
457 claims
- Restasis 113
Restasis
113 claims
- Latanoprost 85
Latanoprost
85 claims
- Prednisolone Acetate 62
Prednisolone Acetate
62 claims
- Cyclosporine 59
Cyclosporine
59 claims
- Doxycycline Monohy… 46
Doxycycline Monohydrate
46 claims
- Neomycin-Polymyxin… 43
Neomycin-Polymyxin-Dexameth
43 claims
- Prednisone 26
Prednisone
26 claims
| Drug | Claims |
|---|---|
| Erythromycin Erythromycin Base | 457 |
| Restasis Cyclosporine | 113 |
| Latanoprost | 85 |
| Prednisolone Acetate | 62 |
| Cyclosporine | 59 |
| Doxycycline Monohydrate | 46 |
| Neomycin-Polymyxin-Dexameth Neomycin/Polymyxin B/Dexametha | 43 |
| Prednisone | 26 |
| Tramadol Hcl | 23 |
| Timolol Maleate | 18 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How John Choi, M.D. fits within the Ophthalmology Physician landscape nationally.
22,388
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,490
Avg Claims per Provider
John Choi, M.D.'s 1,025 claims are below the specialty average of 1,490.
Nationwide Ophthalmology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Choi, both outside Illinois so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (75 here).
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Ophthalmology Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Choi.
One of 891 Ophthalmology Physician providers enrolled in Illinois, 5 are shown here.
Dr. Walid Abdallah
MD
Rockford, IL
Dr. Robert Abishek
MD
Chicago, IL
Dr. Ashley Abraham
M.D.
Springfield, IL
Dr. Evelyn Ackermann
MD
Elgin, IL
Dr. Kathleen Ackman Blake
MD
Hinsdale, IL
Compare Ophthalmology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is John Choi, M.D.'s specialty? ▼
John Choi, M.D. specializes in Ophthalmology Physician and practices in Warrenville, Illinois. Credentials: M.D..
How much does John Choi, M.D. prescribe under Medicare Part D? ▼
In 2024, John Choi, M.D. wrote 1,025 Medicare Part D claims totaling $159K in drug costs for 240 beneficiaries.
What is John Choi, M.D.'s Medicare quality score? ▼
John Choi, M.D. has a CMS MIPS Final Score of 75/100. CMS published no Quality, Promoting Interoperability, Improvement Activity or Cost score for this clinician, so the final score is the neutral performance threshold CMS assigns rather than a measured result. 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 John Choi, M.D. located? ▼
John Choi, M.D. is located at 28375 DAVIS PKWY, Warrenville, IL, 60555. Phone: (630) 836-1616.
What is John Choi, M.D.'s NPI number? ▼
John Choi, M.D.'s National Provider Identifier (NPI) is 1699765230, issued on 10/25/2005.
Does John Choi, M.D. prescribe more brand-name or generic drugs? ▼
John Choi, M.D.'s prescribing is 31% brand-name and 69% generic drugs by claim count, with $141K in brand drug costs.
Does John Choi, M.D. prescribe opioids? ▼
Yes, John Choi, M.D. had 23 opioid claims in 2024 with an opioid prescribing rate of 2.2%.
How many Ophthalmology Physician providers are there in the US? ▼
There are 22,388 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,490 Medicare Part D claims per year.
What drugs does John Choi, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, John Choi, M.D.'s most frequently prescribed drugs include Erythromycin, Restasis, Latanoprost. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Choi, M.D. accept Medicare? ▼
John Choi, M.D. appears in CMS Medicare data with 1,025 Part D claims and 240 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Choi, M.D.'s credentials? ▼
John Choi, M.D.'s NPI is 1699765230 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.
- 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.