NPI registry status
Active
2026 NPPES data Optometrist NPI 1356728778 O.D.
Verify on CMS → Ashley Hui, O.D.
Optometrist in Iowa City, Iowa.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 60,484 in Optometrist, 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
240
Medicare Part D claims · 77 beneficiaries · Optometrist avg: 257
Generic prescribing
51%
generic claims · 49% 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
Ashley Hui, O.D. filed 240 Medicare Part D claims in 2023 as a Optometrist in Iowa City, Iowa, prescribing 51% generic.
- 240
- Part D claims, 2023
- 51%
- 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.
Ashley Hui, O.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
240 49th percentile higher than 49% 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
What does the federal data show about Ashley Hui, O.D.?
Quality data not reportedPrimary specialty
Optometrist
Medicare Part D claims
240 7% vs specialty avg
Specialty distribution in Iowa
How Optometrist compares to other specialties among Iowa 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 Optometrist. 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).
Ashley Hui, O.D. appears in the CMS NPPES registry as an Optometrist provider holding O.D. credentials at 200 HAWKINS DR, Iowa City, IA, 52242, with a listed phone of (319) 356-2852. NPI 1356728778 was issued on 05/05/2015.
Medicare Part D records for calendar year 2023 show 240 prescription claims written by this provider, covering 77 Medicare beneficiaries and totaling roughly $278K in drug spend, split 49% brand-name and 51% generic by claim count.
Optometrist is a high-volume specialty nationwide, with 60,484 enrolled providers across 56 states and an average of 257 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 | 1356728778 |
|---|---|
| Specialty | Optometrist |
| Credentials | O.D. |
| Gender | Female |
| NPI Issued | 05/05/2015 |
Hospital and facility affiliations
Facilities where Ashley Hui, O.D. 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.
State University OF Iowa
Iowa City, IA
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
Ashley Hui, O.D. - brand share 49.0%
Optometrist average
49% brand-name claims vs 51% generic, on 240 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.
240
Total Claims
$278K
Total Drug Cost
77
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 303
- Total Day Supply
- 7,763
- Brand vs Generic
- 49% brand / 51% generic
- Brand Drug Cost
- $275K
- Generic Drug Cost
- $3K
- Antibiotic Claims
- 28
Patient Demographics
- Average Patient Age
- 71.8 years
- Avg HCC Risk Score
- 1.17
- Gender Split
- 69% female / 31% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ashley Hui, O.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Erythromycin
Erythromycin
41 claims
- Xiidra
Xiidra
26 claims
- Latanoprost
Latanoprost
23 claims
- Doxycycline Hyclate
Doxycycline Hyclate
21 claims
- Restasis
Restasis
18 claims
- Restasis Multidose 15
Restasis Multidose
15 claims
- Tyrvaya 15
Tyrvaya
15 claims
- Fluorometholone 13
Fluorometholone
13 claims
| Drug | Claims |
|---|---|
| Erythromycin Erythromycin Base | 41 |
| Xiidra Lifitegrast | 26 |
| Latanoprost | 23 |
| Doxycycline Hyclate | 21 |
| Restasis Cyclosporine | 18 |
| Restasis Multidose Cyclosporine | 15 |
| Tyrvaya Varenicline Tartrate | 15 |
| Fluorometholone | 13 |
| Valacyclovir Valacyclovir Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Optometrist Overview
How Ashley Hui, O.D. fits within the Optometrist landscape nationally.
60,484
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider
Ashley Hui, O.D.'s 240 claims are below the specialty average of 257.
Nearby Optometrist Providers in Iowa
Other clinicians with the same primary specialty enrolled in Iowa, drawn from the same CMS NPPES roster as Hui.
Dr. Ryan Ackerman
O.D.
Rock Rapids, IA
Dr. Katie Adams
OD
West Union, IA
Dr. Paul Ahern
O.D.
Dyersville, IA
Dr. George Alberhasky
O.D., P.C.
Iowa City, IA
Dr. Troy Albrecht
OD
Marion, IA
Compare Optometrist 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 Iowa medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Optometrist 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 Ashley Hui, O.D.'s specialty? ▼
Ashley Hui, O.D. specializes in Optometrist and practices in Iowa City, Iowa. Credentials: O.D..
How much does Ashley Hui, O.D. prescribe under Medicare Part D? ▼
In 2023, Ashley Hui, O.D. wrote 240 Medicare Part D claims totaling $278K in drug costs for 77 beneficiaries.
Where is Ashley Hui, O.D. located? ▼
Ashley Hui, O.D. is located at 200 HAWKINS DR, Iowa City, IA, 52242. Phone: (319) 356-2852.
What is Ashley Hui, O.D.'s NPI number? ▼
Ashley Hui, O.D.'s National Provider Identifier (NPI) is 1356728778, issued on 05/05/2015.
Does Ashley Hui, O.D. prescribe more brand-name or generic drugs? ▼
Ashley Hui, O.D.'s prescribing is 49% brand-name and 51% generic drugs by claim count, with $275K in brand drug costs.
How many Optometrist providers are there in the US? ▼
There are 60,484 Optometrist providers across 56 states in the US. The average Optometrist provider writes 257 Medicare Part D claims per year.
What drugs does Ashley Hui, O.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Ashley Hui, O.D.'s most frequently prescribed drugs include Erythromycin, Xiidra, Latanoprost. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ashley Hui, O.D. accept Medicare? ▼
Ashley Hui, O.D. appears in CMS Medicare data with 240 Part D claims and 77 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ashley Hui, O.D.'s credentials? ▼
Ashley Hui, O.D.'s NPI is 1356728778 with credentials O.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 (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.