2026 NPPES data Cornea and External Diseases Specialist Physician NPI 1023647898 MD PHD
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JILLIAN LIU, MD PHD

Cornea and External Diseases Specialist Physician in SAINT LOUIS, Missouri. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
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
What the federal data reveals: JILLIAN LIU, MD PHD is a Cornea and External Diseases Specialist Physician ([object Object]) practicing in SAINT LOUIS, Missouri with a Medicare Part D prescribing footprint of 86 claims across 20 beneficiaries — 36% brand-name prescribing .

What stands out: JILLIAN LIU, MD PHD filed 86 Medicare Part D claims in 2023 across SAINT LOUIS, Missouri. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

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).

JILLIAN LIU, MD PHD at a glance

Quality data not reported

NPI registry status

Active

Issued 04/03/2020

NPI 1023647898

Primary specialty

Cornea and External Diseases Specialist Physician

Rare

294 US NPIs in this specialty

Medicare Part D claims

86 93% vs specialty avg

2023 prescription claims

Specialty avg: 1,232

Specialty distribution in Missouri

How Cornea and External Diseases Specialist Physician compares to other specialties among Missouri providers

Missouri providers

Cornea and External Diseases Specialist Physician share within Missouri

1. Cornea and External Diseases Specialist Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Cornea and External Diseases Specialist Physician share within Missouri

Specialty board-certification context

Estimated specialty board-certified rate — Cornea and External Diseases Specialist Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Cornea and External Diseases Specialist Physician ABMS/AOA estimate

Est. board-certified rate (Cornea and External Diseases Specialist Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Cornea and External Diseases Specialist Physician) — ABMS / AOA estimate

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 is a Cornea and External Diseases Specialist Physician provider practicing in SAINT LOUIS, Missouri, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD PHD. NPI: 1023647898. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

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. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LIU most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

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. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

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

4901 FOREST PARK AVE
SAINT LOUIS, MO 63108

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%
Specialty average (est.)

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.

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.

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.

Compare Cornea and External Diseases Specialist Physician nationally: see state-by-state distribution →

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

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