NPI registry status
Active
2026 NPPES data Cornea and External Diseases Specialist Physician NPI 1023647898 MD PHD
Verify on CMS → Jillian Liu, MD PHD
Cornea and External Diseases Specialist Physician in Saint Louis, Missouri.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 294 in Cornea and External Diseases Specialist 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
86
Medicare Part D claims · 20 beneficiaries · Cornea and External Diseases Specialist Physician avg: 1K
Generic prescribing
64%
generic claims · 36% 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
Jillian Liu, MD PHD filed 86 Medicare Part D claims in 2023 as a Cornea and External Diseases Specialist Physician in Saint Louis, Missouri, prescribing 64% generic.
- 86
- Part D claims, 2023
- 64%
- 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.
Jillian Liu, MD PHD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
86 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 certification likely (heuristic, not verified)
Jillian Liu, MD PHD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Jillian Liu, MD PHD?
Quality data not reportedPrimary specialty
Cornea and External Diseases Specialist Physician
Medicare Part D claims
86 93% vs specialty avg
Specialty distribution in Missouri
How Cornea and External Diseases Specialist Physician compares to other specialties among Missouri 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 Cornea and External Diseases Specialist 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).
Jillian Liu, MD PHD appears in the CMS NPPES registry as a Cornea and External Diseases Specialist Physician provider holding MD PHD credentials at 4901 FOREST PARK AVE, Saint Louis, MO, 63108, with a listed phone of (314) 362-3937. NPI 1023647898 was issued on 04/03/2020.
Medicare Part D records for calendar year 2023 show 86 prescription claims written by this provider, covering 20 Medicare beneficiaries and totaling roughly $12K in drug spend, split 36% brand-name and 64% generic by claim count.
Cornea and External Diseases Specialist Physician is a narrow specialty nationwide, with 294 enrolled providers across 43 states and an average of 1,232 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 | 1023647898 |
|---|---|
| Specialty | Cornea and External Diseases Specialist Physician |
| Credentials | MD PHD |
| Gender | Female |
| NPI Issued | 04/03/2020 |
Hospital and facility affiliations
Facilities where Jillian Liu, MD PHD 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.
Washington University
Saint Louis, MO
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Above average
Jillian Liu, MD PHD - brand share 36.0%
Cornea and External Diseases Specialist Physician average
36% brand-name claims vs 64% generic, on 86 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.
86
Total Claims
$12K
Total Drug Cost
20
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 118
- Total Day Supply
- 3,323
- Brand vs Generic
- 36% brand / 64% generic
- Brand Drug Cost
- $11K
- Generic Drug Cost
- $1K
Patient Demographics
- Average Patient Age
- 66.7 years
- Avg HCC Risk Score
- 2.29
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Jillian Liu, MD PHD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Dorzolamide-Timolol
Dorzolamide-Timolol
17 claims
- Latanoprost
Latanoprost
14 claims
- Brimonidine Tartrate
Brimonidine Tartrate
12 claims
- Rocklatan
Rocklatan
11 claims
| Drug | Claims |
|---|---|
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 17 |
| Latanoprost | 14 |
| Brimonidine Tartrate | 12 |
| Rocklatan Netarsudil Mesylat/Latanoprost | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Cornea and External Diseases Specialist Physician in MO →
All providers in Missouri →
Compare specialties →
Cornea and External Diseases Specialist Physician Overview
How Jillian Liu, MD PHD fits within the Cornea and External Diseases Specialist Physician landscape nationally.
294
Cornea and External Diseases Specialist Physician Providers in US
43
States with Cornea and External Diseases Specialist Physician
1,232
Avg Claims per Provider
Jillian Liu, MD PHD's 86 claims are below the specialty average of 1,232.
Nearby Cornea and External Diseases Specialist Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Liu.
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 Missouri medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Cornea and External Diseases Specialist 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 Jillian Liu, MD PHD's specialty? ▼
Jillian Liu, MD PHD specializes in Cornea and External Diseases Specialist Physician and practices in Saint Louis, Missouri. Credentials: MD PHD.
How much does Jillian Liu, MD PHD prescribe under Medicare Part D? ▼
In 2023, Jillian Liu, MD PHD wrote 86 Medicare Part D claims totaling $12K in drug costs for 20 beneficiaries.
Where is Jillian Liu, MD PHD located? ▼
Jillian Liu, MD PHD is located at 4901 FOREST PARK AVE, Saint Louis, MO, 63108. Phone: (314) 362-3937.
What is Jillian Liu, MD PHD's NPI number? ▼
Jillian Liu, MD PHD's National Provider Identifier (NPI) is 1023647898, issued on 04/03/2020.
Does Jillian Liu, MD PHD prescribe more brand-name or generic drugs? ▼
Jillian Liu, MD PHD's prescribing is 36% brand-name and 64% generic drugs by claim count, with $11K in brand drug costs.
How many Cornea and External Diseases Specialist Physician providers are there in the US? ▼
There are 294 Cornea and External Diseases Specialist Physician providers across 43 states in the US. The average Cornea and External Diseases Specialist Physician provider writes 1,232 Medicare Part D claims per year.
What drugs does Jillian Liu, MD PHD prescribe most often? ▼
Based on 2023 Medicare Part D data, Jillian Liu, MD PHD's most frequently prescribed drugs include Dorzolamide-Timolol, Latanoprost, Brimonidine Tartrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Jillian Liu, MD PHD accept Medicare? ▼
Jillian Liu, MD PHD appears in CMS Medicare data with 86 Part D claims and 20 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jillian Liu, MD PHD's credentials? ▼
Jillian Liu, MD PHD's NPI is 1023647898 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.