NPI registry status
Active
2026 NPPES data Gerontology Nurse Practitioner NPI 1740700442 AGPCNP-BC
Verify on CMS → Margaret Horton-Breshears, AGPCNP-BC
Gerontology Nurse Practitioner in Tucson, 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 9,706 in Gerontology 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 · Gerontology Nurse Practitioner avg: 1K
Generic prescribing
81%
generic claims · 17% 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
Margaret Horton-Breshears, AGPCNP-BC filed 3,990 Medicare Part D claims in 2023 as a Gerontology Nurse Practitioner in Tucson, Arizona, prescribing 81% generic.
- 4K
- Part D claims, 2023
- 81%
- 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.
Margaret Horton-Breshears, AGPCNP-BC's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,990 Top 9% higher than 91% 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 Margaret Horton-Breshears, AGPCNP-BC?
Quality data not reportedPrimary specialty
Gerontology Nurse Practitioner
Medicare Part D claims
3,990 211% vs specialty avg
Specialty distribution in Arizona
How Gerontology 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 Gerontology 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).
Margaret Horton-Breshears, AGPCNP-BC appears in the CMS NPPES registry as a Gerontology Nurse Practitioner provider holding AGPCNP-BC credentials at 1230 S CHERRYBELL STRA, Tucson, AZ, 85713, with a listed phone of (520) 670-3909. NPI 1740700442 was issued on 06/23/2017.
Medicare Part D records for calendar year 2023 show 3,990 prescription claims written by this provider, covering 340 Medicare beneficiaries and totaling roughly $524K in drug spend, split 17% brand-name and 81% generic by claim count, with an opioid prescribing rate of 2.7%.
Gerontology Nurse Practitioner is a mid-sized specialty nationwide, with 9,706 enrolled providers across 54 states and an average of 1,283 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 | 1740700442 |
|---|---|
| Specialty | Gerontology Nurse Practitioner |
| Credentials | AGPCNP-BC |
| Gender | Female |
| NPI Issued | 06/23/2017 |
Hospital and facility affiliations
Facilities where Margaret Horton-Breshears, AGPCNP-BC 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.
EL Rio Santa Cruz Neighborhood Health Center Inc
Tucson, AZ
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 · Typical
Margaret Horton-Breshears, AGPCNP-BC - brand share 17.0%
Gerontology Nurse Practitioner average
17% brand-name claims vs 81% generic, on 3,990 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.
3,990
Total Claims
$524K
Total Drug Cost
340
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,914
- Total Day Supply
- 227,421
- Brand vs Generic
- 17% brand / 81% generic
- Brand Drug Cost
- $455K
- Generic Drug Cost
- $65K
- Opioid Claims
- 108 (2.7% rate)
- Antibiotic Claims
- 57
Patient Demographics
- Average Patient Age
- 66.7 years
- Avg HCC Risk Score
- 1.54
- Gender Split
- 65% female / 35% male
- Age Distribution
- <65: 101, 65-74: 166, 75-84: 57, 85+: 16
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Margaret Horton-Breshears, AGPCNP-BC prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
250 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
226 claims
- Lisinopril
Lisinopril
182 claims
- Metformin Hcl
Metformin Hcl
152 claims
- Losartan Potassium
Losartan Potassium
139 claims
- Levothyroxine Sodium
Levothyroxine Sodium
121 claims
- Amlodipine Besylate
Amlodipine Besylate
112 claims
- Gabapentin
Gabapentin
106 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 250 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 226 |
| Lisinopril | 182 |
| Metformin Hcl | 152 |
| Losartan Potassium | 139 |
| Levothyroxine Sodium | 121 |
| Amlodipine Besylate | 112 |
| Gabapentin | 106 |
| Omeprazole | 97 |
| Pravastatin Sodium | 97 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gerontology Nurse Practitioner Overview
How Margaret Horton-Breshears, AGPCNP-BC fits within the Gerontology Nurse Practitioner landscape nationally.
9,706
Gerontology Nurse Practitioner Providers in US
54
States with Gerontology Nurse Practitioner
1,283
Avg Claims per Provider
Margaret Horton-Breshears, AGPCNP-BC's 3,990 claims are above the specialty average of 1,283.
Nearby Gerontology Nurse Practitioner Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Horton-Breshears.
Dr. Efoui Abotsi-Kowu
NP
Yuma, AZ
Dr. Celina Acevedo-Adams
AGACNP-BC
Phoenix, AZ
Dr. Marion Adams
N.P.
Tucson, AZ
Dr. Felicia Aman
NURSE PRACTITIONER
Tempe, AZ
Dr. Crystal Aroz
FNP
Safford, AZ
Compare Gerontology Nurse Practitioner 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 Arizona medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Gerontology Nurse Practitioner 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 Margaret Horton-Breshears, AGPCNP-BC's specialty? ▼
Margaret Horton-Breshears, AGPCNP-BC specializes in Gerontology Nurse Practitioner and practices in Tucson, Arizona. Credentials: AGPCNP-BC.
How much does Margaret Horton-Breshears, AGPCNP-BC prescribe under Medicare Part D? ▼
In 2023, Margaret Horton-Breshears, AGPCNP-BC wrote 3,990 Medicare Part D claims totaling $524K in drug costs for 340 beneficiaries.
Where is Margaret Horton-Breshears, AGPCNP-BC located? ▼
Margaret Horton-Breshears, AGPCNP-BC is located at 1230 S CHERRYBELL STRA, Tucson, AZ, 85713. Phone: (520) 670-3909.
What is Margaret Horton-Breshears, AGPCNP-BC's NPI number? ▼
Margaret Horton-Breshears, AGPCNP-BC's National Provider Identifier (NPI) is 1740700442, issued on 06/23/2017.
Does Margaret Horton-Breshears, AGPCNP-BC prescribe more brand-name or generic drugs? ▼
Margaret Horton-Breshears, AGPCNP-BC's prescribing is 17% brand-name and 81% generic drugs by claim count, with $455K in brand drug costs.
Does Margaret Horton-Breshears, AGPCNP-BC prescribe opioids? ▼
Yes, Margaret Horton-Breshears, AGPCNP-BC had 108 opioid claims in 2023 with an opioid prescribing rate of 2.7%.
How many Gerontology Nurse Practitioner providers are there in the US? ▼
There are 9,706 Gerontology Nurse Practitioner providers across 54 states in the US. The average Gerontology Nurse Practitioner provider writes 1,283 Medicare Part D claims per year.
What drugs does Margaret Horton-Breshears, AGPCNP-BC prescribe most often? ▼
Based on 2023 Medicare Part D data, Margaret Horton-Breshears, AGPCNP-BC's most frequently prescribed drugs include Atorvastatin Calcium, Albuterol Sulfate Hfa, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Margaret Horton-Breshears, AGPCNP-BC accept Medicare? ▼
Margaret Horton-Breshears, AGPCNP-BC appears in CMS Medicare data with 3,990 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 Margaret Horton-Breshears, AGPCNP-BC's credentials? ▼
Margaret Horton-Breshears, AGPCNP-BC's NPI is 1740700442 with credentials AGPCNP-BC. 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.