NPI registry status
Active
2026 NPPES data Psychiatric/Mental Health Registered Nurse NPI 1518104397 APRN
Verify on CMS → Jennifer Darby, APRN
Psychiatric/Mental Health Registered Nurse in Knoxville, Tennessee.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 11,741 in Psychiatric/Mental Health Registered Nurse, 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
2K
Medicare Part D claims · 74 beneficiaries · Psychiatric/Mental Health Registered Nurse avg: 893
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Jennifer Darby, APRN filed 2,488 Medicare Part D claims in 2023 as a Psychiatric/Mental Health Registered Nurse in Knoxville, Tennessee, prescribing 92% generic.
- 2K
- Part D claims, 2023
- 92%
- generic prescribing
- ≥86th
- 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.
CMS NPPES provider registry desk
NPI 1518104397 · Psychiatric/Mental Health Registered Nurse
NPI-10 · ENUM-MID · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1518104397
- ENUM-MID 2009
- TAX-MID 12K Psychiatric/Mental Health
- RX-MID 2,488
- BOOK-THIN 254 in Tennessee
- PHOTO-ENUM Dorene Vox · 2009
Jennifer Darby, APRN's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,488 ≥ 86th percentile 86% of 1,370,886 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 · 2023
What does the federal data show about Jennifer Darby, APRN?
Quality data not reportedPrimary specialty
Psychiatric/Mental Health Registered Nurse
Medicare Part D claims
2,488 179% vs specialty avg
Specialty distribution in Tennessee
How Psychiatric/Mental Health Registered Nurse compares to other specialties among Tennessee 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 Psychiatric/Mental Health Registered Nurse. 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 | 1518104397 |
|---|---|
| Specialty | Psychiatric/Mental Health Registered Nurse |
| Credentials | APRN |
| Gender | Female |
| NPI Issued | 01/15/2009 |
Brand vs generic prescribing mix · Generic-heavy
Jennifer Darby, APRN - brand share 8.0%
Psychiatric/Mental Health Registered Nurse average
8% brand-name claims vs 92% generic, on 2,488 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.
2,488
Total Claims
$556K
Total Drug Cost
74
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,617
- Total Day Supply
- 73,175
- Brand vs Generic
- 8% brand / 92% generic
- Brand Drug Cost
- $463K
- Generic Drug Cost
- $94K
Patient Demographics
- Average Patient Age
- 50.4 years
- Avg HCC Risk Score
- 1.47
- Gender Split
- 42% female / 58% male
- Age Distribution
- <65: 60, 65-74: 13, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Jennifer Darby, APRN prescribes most
Top Medicare Part D drugs by claim count, 2023
- Olanzapine
Olanzapine
202 claims
- Trazodone Hcl
Trazodone Hcl
167 claims
- Hydroxyzine Hcl
Hydroxyzine Hcl
136 claims
- Quetiapine Fumarate
Quetiapine Fumarate
131 claims
- Bupropion Xl
Bupropion Xl
120 claims
- Sertraline Hcl
Sertraline Hcl
105 claims
- Aripiprazole
Aripiprazole
102 claims
- Buspirone Hcl
Buspirone Hcl
87 claims
| Drug | Claims |
|---|---|
| Olanzapine | 202 |
| Trazodone Hcl | 167 |
| Hydroxyzine Hcl | 136 |
| Quetiapine Fumarate | 131 |
| Bupropion Xl Bupropion Hcl | 120 |
| Sertraline Hcl | 105 |
| Aripiprazole | 102 |
| Buspirone Hcl | 87 |
| Escitalopram Oxalate | 86 |
| Lamotrigine | 72 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Psychiatric/Mental Health Registered Nurse in TN →
All providers in Tennessee →
Compare specialties →
Psychiatric/Mental Health Registered Nurse Overview
How Jennifer Darby, APRN fits within the Psychiatric/Mental Health Registered Nurse landscape nationally.
11,741
Psychiatric/Mental Health Registered Nurse Providers in US
54
States with Psychiatric/Mental Health Registered Nurse
893
Avg Claims per Provider
Jennifer Darby, APRN's 2,488 claims are above the specialty average of 893.
Nationwide Psychiatric/Mental Health Registered Nurse peers with similar MIPS or enrollment year
Two federal-record peer sets for Darby, both outside Tennessee 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 Psychiatric/Mental Health Registered Nurse Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Darby.
One of 254 Psychiatric/Mental Health Registered Nurse providers enrolled in Tennessee, 5 are shown here.
Dr. Rita Abbott
RN
Oneida, TN
Dr. Kimberly Adams
NP
Chattanooga, TN
Dr. Jessica Allison
RN
Morristown, TN
Barbara Amburn
Knoxville, TN
Dr. Bethany Andersen
PMHNP-BC
Franklin, TN
Compare Psychiatric/Mental Health Registered Nurse nationally: see state-by-state distribution →
Frequently Asked Questions
What is Jennifer Darby, APRN's specialty? ▼
Jennifer Darby, APRN specializes in Psychiatric/Mental Health Registered Nurse and practices in Knoxville, Tennessee. Credentials: APRN.
How much does Jennifer Darby, APRN prescribe under Medicare Part D? ▼
In 2023, Jennifer Darby, APRN wrote 2,488 Medicare Part D claims totaling $556K in drug costs for 74 beneficiaries.
Where is Jennifer Darby, APRN located? ▼
Jennifer Darby, APRN is located at 2018 WESTERN AVE, Knoxville, TN, 37921. Phone: (865) 544-0406.
What is Jennifer Darby, APRN's NPI number? ▼
Jennifer Darby, APRN's National Provider Identifier (NPI) is 1518104397, issued on 01/15/2009.
Does Jennifer Darby, APRN prescribe more brand-name or generic drugs? ▼
Jennifer Darby, APRN's prescribing is 8% brand-name and 92% generic drugs by claim count, with $463K in brand drug costs.
How many Psychiatric/Mental Health Registered Nurse providers are there in the US? ▼
There are 11,741 Psychiatric/Mental Health Registered Nurse providers across 54 states in the US. The average Psychiatric/Mental Health Registered Nurse provider writes 893 Medicare Part D claims per year.
What drugs does Jennifer Darby, APRN prescribe most often? ▼
Based on 2023 Medicare Part D data, Jennifer Darby, APRN's most frequently prescribed drugs include Olanzapine, Trazodone Hcl, Hydroxyzine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Jennifer Darby, APRN accept Medicare? ▼
Jennifer Darby, APRN appears in CMS Medicare data with 2,488 Part D claims and 74 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jennifer Darby, APRN's credentials? ▼
Jennifer Darby, APRN's NPI is 1518104397 with credentials APRN. 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
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.