NPI registry status
Active
2026 NPPES data Optometrist NPI 1811242357 O.D.
Verify on CMS → Hilary Parrish, O.D.
Optometrist in Vicksburg, Mississippi.
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
574
Medicare Part D claims · 161 beneficiaries · Optometrist avg: 257
Generic prescribing
47%
generic claims · 53% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$393.83
17 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
Hilary Parrish, O.D. filed 574 Medicare Part D claims in 2023 as a Optometrist in Vicksburg, Mississippi, prescribing 47% generic.
- 574
- Part D claims, 2023
- 47%
- generic prescribing
- $393.83
- industry payments (Sunshine Act)
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.
Hilary Parrish, O.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
574 Top 34% higher than 66% 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 Hilary Parrish, O.D.?
Quality data not reportedPrimary specialty
Optometrist
Medicare Part D claims
574 123% vs specialty avg
Specialty distribution in Mississippi
How Optometrist compares to other specialties among Mississippi 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).
Hilary Parrish, O.D. appears in the CMS NPPES registry as an Optometrist provider holding O.D. credentials at 2011 HIGHWAY 61 N, Vicksburg, MS, 39183, with a listed phone of (601) 630-9199. NPI 1811242357 was issued on 07/20/2012.
Medicare Part D records for calendar year 2023 show 574 prescription claims written by this provider, covering 161 Medicare beneficiaries and totaling roughly $138K in drug spend, split 53% brand-name and 47% 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 | 1811242357 |
|---|---|
| Specialty | Optometrist |
| Credentials | O.D. |
| Gender | Female |
| NPI Issued | 07/20/2012 |
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 Hilary Parrish, O.D.. Source: openpaymentsdata.cms.gov.
Total received
$394
Largest payer
Alcon Vision LLC
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.
Brand vs generic prescribing mix · Brand-heavy
Hilary Parrish, O.D. - brand share 53.0%
Optometrist average
53% brand-name claims vs 47% generic, on 574 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.
574
Total Claims
$138K
Total Drug Cost
161
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 934
- Total Day Supply
- 26,044
- Brand vs Generic
- 53% brand / 47% generic
- Brand Drug Cost
- $133K
- Generic Drug Cost
- $4K
- Antibiotic Claims
- 15
Patient Demographics
- Average Patient Age
- 69.7 years
- Avg HCC Risk Score
- 1.48
- Gender Split
- 62% female / 38% male
- Age Distribution
- <65: 36, 65-74: 71, 75-84: 42, 85+: 12
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Hilary Parrish, O.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Latanoprost
Latanoprost
194 claims
- Lumigan 70
Lumigan
70 claims
- Neomycin-Polymyxin… 53
Neomycin-Polymyxin-Dexameth
53 claims
- Restasis 53
Restasis
53 claims
- Dorzolamide-Timolol 33
Dorzolamide-Timolol
33 claims
- Prednisolone Acetate 33
Prednisolone Acetate
33 claims
- Brimonidine Tartrate 28
Brimonidine Tartrate
28 claims
- Combigan 25
Combigan
25 claims
| Drug | Claims |
|---|---|
| Latanoprost | 194 |
| Lumigan Bimatoprost | 70 |
| Neomycin-Polymyxin-Dexameth Neomycin/Polymyxin B/Dexametha | 53 |
| Restasis Cyclosporine | 53 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 33 |
| Prednisolone Acetate | 33 |
| Brimonidine Tartrate | 28 |
| Combigan Brimonidine Tartrate/Timolol | 25 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Optometrist Overview
How Hilary Parrish, O.D. fits within the Optometrist landscape nationally.
60,484
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider
Hilary Parrish, O.D.'s 574 claims are above the specialty average of 257.
Nearby Optometrist Providers in Mississippi
Other clinicians with the same primary specialty enrolled in Mississippi, drawn from the same CMS NPPES roster as Parrish.
Dr. Sean Aldinger
OD
Olive Branch, MS
Dr. Mark Allen
OD
Flowood, MS
Dr. Katie Amann
OD
Oxford, MS
Dr. Kimberly Ambrosino
O.D.
Southaven, MS
Dr. Parth Amin
O.D.
Southaven, MS
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 Mississippi 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 Hilary Parrish, O.D.'s specialty? ▼
Hilary Parrish, O.D. specializes in Optometrist and practices in Vicksburg, Mississippi. Credentials: O.D..
How much does Hilary Parrish, O.D. prescribe under Medicare Part D? ▼
In 2023, Hilary Parrish, O.D. wrote 574 Medicare Part D claims totaling $138K in drug costs for 161 beneficiaries.
Where is Hilary Parrish, O.D. located? ▼
Hilary Parrish, O.D. is located at 2011 HIGHWAY 61 N, Vicksburg, MS, 39183. Phone: (601) 630-9199.
What is Hilary Parrish, O.D.'s NPI number? ▼
Hilary Parrish, O.D.'s National Provider Identifier (NPI) is 1811242357, issued on 07/20/2012.
Does Hilary Parrish, O.D. prescribe more brand-name or generic drugs? ▼
Hilary Parrish, O.D.'s prescribing is 53% brand-name and 47% generic drugs by claim count, with $133K 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 Hilary Parrish, O.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Hilary Parrish, O.D.'s most frequently prescribed drugs include Latanoprost, Lumigan, Neomycin-Polymyxin-Dexameth. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Hilary Parrish, O.D. accept Medicare? ▼
Hilary Parrish, O.D. appears in CMS Medicare data with 574 Part D claims and 161 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Hilary Parrish, O.D.'s credentials? ▼
Hilary Parrish, O.D.'s NPI is 1811242357 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.