NPI registry status
Active
2026 NPPES data Family Nurse Practitioner NPI 1922653344 NP
Verify on CMS → Justine Winchester, NP
Family Nurse Practitioner in Cottonwood, Arizona.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 210,832 in Family Nurse Practitioner, 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
4K
Medicare Part D claims · 340 beneficiaries · Family Nurse Practitioner avg: 1K
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, 2023
What the federal data shows
Justine Winchester, NP filed 3,551 Medicare Part D claims in 2023 as a Family Nurse Practitioner in Cottonwood, Arizona, prescribing 86% generic.
- 4K
- Part D claims, 2023
- 86%
- generic prescribing
- ≥90th
- 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 1922653344 · Family Nurse Practitioner
NPI-10 · ENUM-RECENT · TAX-MEGA · RX-MID · BOOK-MID · PHOTO-ENUM
- NPI-10 1922653344
- ENUM-RECENT 2019
- TAX-MEGA 211K Family Nurse
- RX-MID 3,551
- BOOK-MID 5,245 in Arizona
- PHOTO-ENUM Lola Popoola · 2019
Justine Winchester, NP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,551 ≥ 90th percentile 90% 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 Justine Winchester, NP?
Quality data not reportedPrimary specialty
Family Nurse Practitioner
Medicare Part D claims
3,551 191% vs specialty avg
Specialty distribution in Arizona
How Family Nurse Practitioner compares to other specialties among Arizona 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 Family Nurse Practitioner. 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 | 1922653344 |
|---|---|
| Specialty | Family Nurse Practitioner |
| Credentials | NP |
| Gender | Female |
| NPI Issued | 08/02/2019 |
Brand vs generic prescribing mix · Typical
Justine Winchester, NP - brand share 14.0%
Family Nurse Practitioner average
14% brand-name claims vs 86% generic, on 3,551 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.
3,551
Total Claims
$381K
Total Drug Cost
340
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,981
- Total Day Supply
- 233,805
- Brand vs Generic
- 14% brand / 86% generic
- Brand Drug Cost
- $293K
- Generic Drug Cost
- $87K
- Opioid Claims
- 64 (1.8% rate)
- Antibiotic Claims
- 74
Patient Demographics
- Average Patient Age
- 67.1 years
- Avg HCC Risk Score
- 1.23
- Gender Split
- 65% female / 35% male
- Age Distribution
- <65: 91, 65-74: 156, 75-84: 78, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Justine Winchester, NP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
189 claims
- Atorvastatin Calcium
Atorvastatin Calcium
181 claims
- Lisinopril
Lisinopril
171 claims
- Metformin Hcl
Metformin Hcl
142 claims
- Amlodipine Besylate
Amlodipine Besylate
130 claims
- Omeprazole
Omeprazole
121 claims
- Gabapentin
Gabapentin
118 claims
- Losartan Potassium
Losartan Potassium
97 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 189 |
| Atorvastatin Calcium | 181 |
| Lisinopril | 171 |
| Metformin Hcl | 142 |
| Amlodipine Besylate | 130 |
| Omeprazole | 121 |
| Gabapentin | 118 |
| Losartan Potassium | 97 |
| Trazodone Hcl | 96 |
| Pantoprazole Sodium | 92 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Nurse Practitioner Overview
How Justine Winchester, NP fits within the Family Nurse Practitioner landscape nationally.
210,832
Family Nurse Practitioner Providers in US
56
States with Family Nurse Practitioner
1,222
Avg Claims per Provider
Justine Winchester, NP's 3,551 claims are above the specialty average of 1,222.
Nationwide Family Nurse Practitioner peers with similar MIPS or enrollment year
Two federal-record peer sets for Winchester, both outside Arizona so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2019)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Nurse Practitioner Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Winchester.
One of 5,245 Family Nurse Practitioner providers enrolled in Arizona, 5 are shown here.
Dr. Sharla Abalos
NP
Tucson, AZ
Dr. Kristian Abarca
DNP, FNP
Willcox, AZ
Dr. Rosa Abarca
FNP-BC, FNP-C
Yuma, AZ
Dorothy Abbey
Phoenix, AZ
Dr. Lamia Abdouni
PMHNP
Chandler, AZ
Compare Family Nurse Practitioner nationally: see state-by-state distribution →
Frequently Asked Questions
What is Justine Winchester, NP's specialty? ▼
Justine Winchester, NP specializes in Family Nurse Practitioner and practices in Cottonwood, Arizona. Credentials: NP.
How much does Justine Winchester, NP prescribe under Medicare Part D? ▼
In 2023, Justine Winchester, NP wrote 3,551 Medicare Part D claims totaling $381K in drug costs for 340 beneficiaries.
Where is Justine Winchester, NP located? ▼
Justine Winchester, NP is located at 651 W MINGUS AVE, Cottonwood, AZ, 86326. Phone: (928) 634-2236.
What is Justine Winchester, NP's NPI number? ▼
Justine Winchester, NP's National Provider Identifier (NPI) is 1922653344, issued on 08/02/2019.
Does Justine Winchester, NP prescribe more brand-name or generic drugs? ▼
Justine Winchester, NP's prescribing is 14% brand-name and 86% generic drugs by claim count, with $293K in brand drug costs.
Does Justine Winchester, NP prescribe opioids? ▼
Yes, Justine Winchester, NP had 64 opioid claims in 2023 with an opioid prescribing rate of 1.8%.
How many Family Nurse Practitioner providers are there in the US? ▼
There are 210,832 Family Nurse Practitioner providers across 56 states in the US. The average Family Nurse Practitioner provider writes 1,222 Medicare Part D claims per year.
What drugs does Justine Winchester, NP prescribe most often? ▼
Based on 2023 Medicare Part D data, Justine Winchester, NP's most frequently prescribed drugs include Levothyroxine Sodium, Atorvastatin Calcium, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Justine Winchester, NP accept Medicare? ▼
Justine Winchester, NP appears in CMS Medicare data with 3,551 Part D claims and 340 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Justine Winchester, NP's credentials? ▼
Justine Winchester, NP's NPI is 1922653344 with credentials NP. 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.