NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1124415187
Verify on CMS → Kate Xie
Ophthalmology Physician in Orange, 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 22,090 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
2K
Medicare Part D claims · 505 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
53%
generic claims · 47% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
91.9/100
▲ 9 pts above national avg 83.1 · Exceptional
Industry payments
$3.5K
20 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
Kate Xie reported a CMS MIPS final score of 91.9/100 - above the 83.1 national average - and filed 1,789 Medicare Part D claims in 2023.
- 91.9/100
- MIPS score · +9 vs avg
- 2K
- Part D claims, 2023
- 53%
- 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.
Kate Xie's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
92 Top 37% higher than 63% 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 Kate Xie sits
This provider among ophthalmology physician peers
Across the 9,866 ophthalmology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Kate Xie writes more Part D claims than 67% of them and scores higher on MIPS quality than 62% - placing this provider in the high-volume, high-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 ophthalmology physician peer from a representative sample of 60; the gold marker is Kate Xie. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Kate Xie practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - 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 Kate Xie?
High performer (top quartile)Primary specialty
Ophthalmology Physician
Medicare Part D claims
1,789 26% vs specialty avg
MIPS final score
91.9/100 8.8 pts vs avg
Specialty distribution in California
How Ophthalmology Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Kate Xie's 2023 MIPS final score plotted against the Ophthalmology Physician national average
- MIPS Final Score
- 91.9/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Ophthalmology Physician) - 91.9/100 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).
Kate Xie appears in the CMS NPPES registry as a Ophthalmology Physician provider at 101 THE CITY DR S STE 400, Orange, CA, 92868, with a listed phone of (714) 456-6693. NPI 1124415187 was issued on 04/16/2015.
Medicare Part D records for calendar year 2023 show 1,789 prescription claims written by this provider, covering 505 Medicare beneficiaries and totaling roughly $358K in drug spend, split 47% brand-name and 53% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 91.9/100 for the 2023 performance year (Quality 100, Cost 72.9), compared with the national average of 83.1.
Ophthalmology Physician is a mid-sized specialty nationwide, with 22,090 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 | 1124415187 |
|---|---|
| Specialty | Ophthalmology Physician |
| Gender | Female |
| NPI Issued | 04/16/2015 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
91.8824
Final Score
Avg: 83.1
100
Quality
72.9414
Cost
Reporting: Group practice
Hospital and facility affiliations
Facilities where Kate Xie bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Lakewood Eye Physicians And Surgeons Inc A Medical Group
Lakewood, CA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Kate Xie. Source: openpaymentsdata.cms.gov.
Total received
$3.5K
Largest payer
Johnson & Johnson Surgical Vision, 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 Kate Xie. To verify Kate Xie'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.
Brand vs generic prescribing mix · Above average
Kate Xie - brand share 47.0%
Ophthalmology Physician average
47% brand-name claims vs 53% generic, on 1,789 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.
1,789
Total Claims
$358K
Total Drug Cost
505
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,030
- Total Day Supply
- 84,261
- Brand vs Generic
- 47% brand / 53% generic
- Brand Drug Cost
- $314K
- Generic Drug Cost
- $44K
- Antibiotic Claims
- 24
Patient Demographics
- Average Patient Age
- 76.2 years
- Avg HCC Risk Score
- 1.75
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 28, 65-74: 196, 75-84: 190, 85+: 91
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Kate Xie prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prednisolone Acetate
Prednisolone Acetate
367 claims
- Latanoprost
Latanoprost
258 claims
- Ofloxacin
Ofloxacin
156 claims
- Ketorolac Trometha… 132
Ketorolac Tromethamine
132 claims
- Timolol Maleate 116
Timolol Maleate
116 claims
- Neomycin-Polymyxin… 86
Neomycin-Polymyxin-Dexameth
86 claims
- Dorzolamide-Timolol 72
Dorzolamide-Timolol
72 claims
- Moxifloxacin 68
Moxifloxacin
68 claims
| Drug | Claims |
|---|---|
| Prednisolone Acetate | 367 |
| Latanoprost | 258 |
| Ofloxacin | 156 |
| Ketorolac Tromethamine | 132 |
| Timolol Maleate | 116 |
| Neomycin-Polymyxin-Dexameth Neomycin/Polymyxin B/Dexametha | 86 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 72 |
| Moxifloxacin Moxifloxacin Hcl | 68 |
| Brimonidine Tartrate | 63 |
| Restasis Cyclosporine | 56 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How Kate Xie fits within the Ophthalmology Physician landscape nationally.
22,090
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider
Kate Xie's 1,789 claims are above the specialty average of 1,420.
Nearby Ophthalmology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Xie.
Dr. Sam Abbassi
MD, MS
West Hills, CA
Dr. Richard Abbott
M.D.
San Francisco, CA
Dr. Nizar Abdelfattah
MD
Pasadena, CA
Dr. Parastou Abedi
MD
Aliso Viejo, CA
Dr. Shahla Abedi
MD
Aliso Viejo, CA
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 California 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 Kate Xie's specialty? ▼
Kate Xie specializes in Ophthalmology Physician and practices in Orange, California.
How much does Kate Xie prescribe under Medicare Part D? ▼
In 2023, Kate Xie wrote 1,789 Medicare Part D claims totaling $358K in drug costs for 505 beneficiaries.
What is Kate Xie's Medicare quality score? ▼
Kate Xie has a CMS MIPS Final Score of 91.9/100 (Quality: 100, Cost: 72.9). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Kate Xie located? ▼
Kate Xie is located at 101 THE CITY DR S STE 400, Orange, CA, 92868. Phone: (714) 456-6693.
What is Kate Xie's NPI number? ▼
Kate Xie's National Provider Identifier (NPI) is 1124415187, issued on 04/16/2015.
Does Kate Xie prescribe more brand-name or generic drugs? ▼
Kate Xie's prescribing is 47% brand-name and 53% generic drugs by claim count, with $314K in brand drug costs.
How many Ophthalmology Physician providers are there in the US? ▼
There are 22,090 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,420 Medicare Part D claims per year.
What drugs does Kate Xie prescribe most often? ▼
Based on 2023 Medicare Part D data, Kate Xie's most frequently prescribed drugs include Prednisolone Acetate, Latanoprost, Ofloxacin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Kate Xie accept Medicare? ▼
Kate Xie appears in CMS Medicare data with 1,789 Part D claims and 505 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Kate Xie's credentials? ▼
Kate Xie's NPI is 1124415187. 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.