NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1912587874 MD, PHD
Verify on CMS → Xiaomin Zhang, MD, PHD
Ophthalmology Physician in Chicago, 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 22,082 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
78
Medicare Part D claims · 35 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
85%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
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
Xiaomin Zhang, MD, PHD filed 78 Medicare Part D claims in 2023 as a Ophthalmology Physician in Chicago, Illinois, prescribing 85% generic.
- 78
- Part D claims, 2023
- 85%
- generic prescribing
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.
Xiaomin Zhang, MD, PHD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
78 0th percentile higher than 0% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Xiaomin Zhang, MD, PHD 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 Xiaomin Zhang, MD, PHD?
Quality data not reportedPrimary specialty
Ophthalmology Physician
Medicare Part D claims
78 95% vs specialty avg
Specialty distribution in Illinois
How Ophthalmology 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 Ophthalmology 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).
Xiaomin Zhang, MD, PHD appears in the CMS NPPES registry as an Ophthalmology Physician provider holding MD, PHD credentials at 259 E ERIE ST STE 1520, Chicago, IL, 60611, with a listed phone of (312) 695-8150. NPI 1912587874 was issued on 04/13/2021.
Medicare Part D records for calendar year 2023 show 78 prescription claims written by this provider, covering 35 Medicare beneficiaries and totaling roughly $4K in drug spend, split 15% brand-name and 85% generic by claim count.
Ophthalmology Physician is a mid-sized specialty nationwide, with 22,082 enrolled providers across 56 states and an average of 1,420 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 | 1912587874 |
|---|---|
| Specialty | Ophthalmology Physician |
| Credentials | MD, PHD |
| Gender | Male |
| NPI Issued | 04/13/2021 |
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 Xiaomin Zhang, MD, PHD. To verify Xiaomin Zhang, MD, PHD'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 · Typical
Xiaomin Zhang, MD, PHD - brand share 15.0%
Ophthalmology Physician average
15% brand-name claims vs 85% generic, on 78 2023 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 2023.
78
Total Claims
$4K
Total Drug Cost
35
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 119
- Total Day Supply
- 2,666
- Brand vs Generic
- 15% brand / 85% generic
- Brand Drug Cost
- $2K
- Generic Drug Cost
- $2K
- Antibiotic Claims
- 15
Patient Demographics
- Average Patient Age
- 69.2 years
- Avg HCC Risk Score
- 1.83
- Gender Split
- 60% female / 40% male
Ophthalmology Physician Overview
How Xiaomin Zhang, MD, PHD fits within the Ophthalmology Physician landscape nationally.
22,082
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider
Xiaomin Zhang, MD, PHD's 78 claims are below the specialty average of 1,420.
Nearby Ophthalmology Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Zhang.
Dr. Walid Abdallah
MD
Rockford, IL
Dr. Ashley Abraham
M.D.
Springfield, IL
Dr. Evelyn Ackermann
MD
Elgin, IL
Dr. Kathleen Ackman Blake
MD
Hinsdale, IL
Dr. Kaela Acuff
MD
Chicago, IL
Compare Ophthalmology Physician 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 Illinois medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Ophthalmology 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 Xiaomin Zhang, MD, PHD's specialty? ▼
Xiaomin Zhang, MD, PHD specializes in Ophthalmology Physician and practices in Chicago, Illinois. Credentials: MD, PHD.
How much does Xiaomin Zhang, MD, PHD prescribe under Medicare Part D? ▼
In 2023, Xiaomin Zhang, MD, PHD wrote 78 Medicare Part D claims totaling $4K in drug costs for 35 beneficiaries.
Where is Xiaomin Zhang, MD, PHD located? ▼
Xiaomin Zhang, MD, PHD is located at 259 E ERIE ST STE 1520, Chicago, IL, 60611. Phone: (312) 695-8150.
What is Xiaomin Zhang, MD, PHD's NPI number? ▼
Xiaomin Zhang, MD, PHD's National Provider Identifier (NPI) is 1912587874, issued on 04/13/2021.
Does Xiaomin Zhang, MD, PHD prescribe more brand-name or generic drugs? ▼
Xiaomin Zhang, MD, PHD's prescribing is 15% brand-name and 85% generic drugs by claim count, with $2K in brand drug costs.
How many Ophthalmology Physician providers are there in the US? ▼
There are 22,082 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,420 Medicare Part D claims per year.
Does Xiaomin Zhang, MD, PHD accept Medicare? ▼
Xiaomin Zhang, MD, PHD appears in CMS Medicare data with 78 Part D claims and 35 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Xiaomin Zhang, MD, PHD's credentials? ▼
Xiaomin Zhang, MD, PHD's NPI is 1912587874 with credentials MD, PHD. 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.
- 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.