NPI registry status
Active
2026 NPPES data Clinical Neuropsychologist NPI 1811131840 PSY.D.
Verify on CMS → Ryan Ernst, PSY.D.
Clinical Neuropsychologist in Clarinda, 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 5,808 in Clinical Neuropsychologist, 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
673
Medicare Part D claims · 61 beneficiaries · Clinical Neuropsychologist avg: 926
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Ryan Ernst, PSY.D. filed 673 Medicare Part D claims in 2024 as a Clinical Neuropsychologist in Clarinda, Iowa, prescribing 86% generic.
- 673
- Part D claims, 2024
- 86%
- generic prescribing
- ≥68th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Ryan Ernst, PSY.D.
Bare NPI registry listing — limited federal enrichment beyond basic enumeration. Verify all credentials with official sources.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1811131840), first enumerated 04/21/2009.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 673 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1811131840 · Clinical Neuropsychologist
NPI-10 · ENUM-MID · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1811131840
- ENUM-MID 2009
- TAX-MID 6K Clinical Neuropsychologist
- RX-LIGHT 673
- BOOK-THIN 39 in Iowa
- PHOTO-ENUM Katalin Eckstein, PSYD · 2009
Ryan Ernst, PSY.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
673 ≥ 68th percentile 68% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
What does the federal data show about Ryan Ernst, PSY.D.?
Quality data not reportedPrimary specialty
Clinical Neuropsychologist
Medicare Part D claims
673 27% vs specialty avg
Specialty distribution in Iowa
How Clinical Neuropsychologist 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 Clinical Neuropsychologist. 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).
Practice Address
Provider Details
| NPI | 1811131840 |
|---|---|
| Specialty | Clinical Neuropsychologist |
| Credentials | PSY.D. |
| Gender | Male |
| NPI Issued | 04/21/2009 |
Brand vs generic prescribing mix · Typical
Ryan Ernst, PSY.D. - brand share 14.0%
Clinical Neuropsychologist average
14% brand-name claims vs 86% generic, on 673 2024 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 2024.
673
Total Claims
$183K
Total Drug Cost
61
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,003.1
- Total Day Supply
- 28,763
- Brand vs Generic
- 14% brand / 86% generic
- Brand Drug Cost
- $172K
- Generic Drug Cost
- $11K
Patient Demographics
- Average Patient Age
- 65.6 years
- Avg HCC Risk Score
- 1.36
- Gender Split
- 61% female / 39% male
- Age Distribution
- <65: 21, 65-74: N/A, 75-84: 20, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Ryan Ernst, PSY.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Fluoxetine Hcl
Fluoxetine Hcl
94 claims
- Sertraline Hcl
Sertraline Hcl
84 claims
- Memantine Hcl
Memantine Hcl
48 claims
- Donepezil Hcl
Donepezil Hcl
45 claims
- Lybalvi
Lybalvi
40 claims
- Clonazepam
Clonazepam
38 claims
- Quetiapine Fumarate 36
Quetiapine Fumarate
36 claims
- Quetiapine Fumarat… 25
Quetiapine Fumarate Er
25 claims
| Drug | Claims |
|---|---|
| Fluoxetine Hcl | 94 |
| Sertraline Hcl | 84 |
| Memantine Hcl | 48 |
| Donepezil Hcl | 45 |
| Lybalvi Olanzapine/Samidorphan Malate | 40 |
| Clonazepam | 38 |
| Quetiapine Fumarate | 36 |
| Quetiapine Fumarate Er Quetiapine Fumarate | 25 |
| Vraylar Cariprazine Hcl | 24 |
| Alprazolam | 23 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Clinical Neuropsychologist Overview
How Ryan Ernst, PSY.D. fits within the Clinical Neuropsychologist landscape nationally.
5,808
Clinical Neuropsychologist Providers in US
53
States with Clinical Neuropsychologist
926
Avg Claims per Provider
Ryan Ernst, PSY.D.'s 673 claims are below the specialty average of 926.
Nationwide Clinical Neuropsychologist peers with similar MIPS or enrollment year
Two federal-record peer sets for Ernst, both outside Iowa so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2009)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Clinical Neuropsychologist Providers in Iowa
Other clinicians with the same primary specialty enrolled in Iowa, drawn from the same CMS NPPES roster as Ernst.
One of 39 Clinical Neuropsychologist providers enrolled in Iowa, 5 are shown here.
Dr. Megan Adams Rieck
PHD
Cedar Rapids, IA
Dr. Steven Anderson
PHD
Iowa City, IA
Dr. Leigh Beglinger
PHD
Iowa City, IA
Dr. Mark Bowren
PHD
Iowa City, IA
Dr. Karla Brennscheidt
PSY.D.
Cedar Falls, IA
Compare Clinical Neuropsychologist nationally: see state-by-state distribution →
Frequently Asked Questions
What is Ryan Ernst, PSY.D.'s specialty? ▼
Ryan Ernst, PSY.D. specializes in Clinical Neuropsychologist and practices in Clarinda, Iowa. Credentials: PSY.D..
How much does Ryan Ernst, PSY.D. prescribe under Medicare Part D? ▼
In 2024, Ryan Ernst, PSY.D. wrote 673 Medicare Part D claims totaling $183K in drug costs for 61 beneficiaries.
Where is Ryan Ernst, PSY.D. located? ▼
Ryan Ernst, PSY.D. is located at 220 ESSIE DAVISON DR, Clarinda, IA, 51632. Phone: (712) 542-8354.
What is Ryan Ernst, PSY.D.'s NPI number? ▼
Ryan Ernst, PSY.D.'s National Provider Identifier (NPI) is 1811131840, issued on 04/21/2009.
Does Ryan Ernst, PSY.D. prescribe more brand-name or generic drugs? ▼
Ryan Ernst, PSY.D.'s prescribing is 14% brand-name and 86% generic drugs by claim count, with $172K in brand drug costs.
How many Clinical Neuropsychologist providers are there in the US? ▼
There are 5,808 Clinical Neuropsychologist providers across 53 states in the US. The average Clinical Neuropsychologist provider writes 926 Medicare Part D claims per year.
What drugs does Ryan Ernst, PSY.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Ryan Ernst, PSY.D.'s most frequently prescribed drugs include Fluoxetine Hcl, Sertraline Hcl, Memantine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ryan Ernst, PSY.D. accept Medicare? ▼
Ryan Ernst, PSY.D. appears in CMS Medicare data with 673 Part D claims and 61 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ryan Ernst, PSY.D.'s credentials? ▼
Ryan Ernst, PSY.D.'s NPI is 1811131840 with credentials PSY.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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.