NPI registry status
Active
2026 NPPES data Adult Health Clinical Nurse Specialist NPI 1790009660 ANP
Verify on CMS → Cynthia Armstrong, ANP
Adult Health Clinical Nurse Specialist in Phoenix, 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 1,379 in Adult Health Clinical Nurse Specialist, 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 · 201 beneficiaries · Adult Health Clinical Nurse Specialist avg: 1K
Generic prescribing
88%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$118.33
2 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Cynthia Armstrong, ANP filed 4,152 Medicare Part D claims in 2023 as an Adult Health Clinical Nurse Specialist in Phoenix, Arizona, prescribing 88% generic.
- 4K
- Part D claims, 2023
- 88%
- generic prescribing
- $118.33
- industry payments (Sunshine Act)
- ≥92nd
- 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 1790009660 · Adult Health Clinical Nurse Specialist
NPI-10 · ENUM-MID · TAX-NARROW · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1790009660
- ENUM-MID 2010
- TAX-NARROW 1,379
- RX-MID 4,152
- BOOK-THIN 10 in Arizona
- PHOTO-ENUM Jane Parthum · 2010
Cynthia Armstrong, ANP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
4,152 ≥ 92nd percentile 92% 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 Cynthia Armstrong, ANP?
Quality data not reportedPrimary specialty
Adult Health Clinical Nurse Specialist
Medicare Part D claims
4,152 282% vs specialty avg
Specialty distribution in Arizona
How Adult Health Clinical Nurse Specialist 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 Adult Health Clinical Nurse Specialist. 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 | 1790009660 |
|---|---|
| Specialty | Adult Health Clinical Nurse Specialist |
| Credentials | ANP |
| Gender | Female |
| NPI Issued | 03/22/2010 |
Hospital and facility affiliations
Facilities where Cynthia Armstrong, ANP 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.
Kmtrask PLLC
Gilbert, 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).
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 Cynthia Armstrong, ANP. Source: openpaymentsdata.cms.gov.
Total received
$118
Largest payer
AstraZeneca Pharmaceuticals LP
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 · Typical
Cynthia Armstrong, ANP - brand share 11.0%
Adult Health Clinical Nurse Specialist average
11% brand-name claims vs 88% generic, on 4,152 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.
4,152
Total Claims
$234K
Total Drug Cost
201
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,813
- Total Day Supply
- 125,274
- Brand vs Generic
- 11% brand / 88% generic
- Brand Drug Cost
- $155K
- Generic Drug Cost
- $76K
- Opioid Claims
- 15 (0.4% rate)
- Antibiotic Claims
- 148
Patient Demographics
- Average Patient Age
- 84.3 years
- Avg HCC Risk Score
- 2.01
- Gender Split
- 76% female / 24% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Cynthia Armstrong, ANP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
180 claims
- Atorvastatin Calcium
Atorvastatin Calcium
174 claims
- Donepezil Hcl
Donepezil Hcl
161 claims
- Lisinopril
Lisinopril
137 claims
- Divalproex Sodium
Divalproex Sodium
125 claims
- Furosemide
Furosemide
118 claims
- Losartan Potassium
Losartan Potassium
112 claims
- Gabapentin
Gabapentin
110 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 180 |
| Atorvastatin Calcium | 174 |
| Donepezil Hcl | 161 |
| Lisinopril | 137 |
| Divalproex Sodium | 125 |
| Furosemide | 118 |
| Losartan Potassium | 112 |
| Gabapentin | 110 |
| Escitalopram Oxalate | 109 |
| Amlodipine Besylate | 105 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Adult Health Clinical Nurse Specialist in AZ →
All providers in Arizona →
Compare specialties →
Adult Health Clinical Nurse Specialist Overview
How Cynthia Armstrong, ANP fits within the Adult Health Clinical Nurse Specialist landscape nationally.
1,379
Adult Health Clinical Nurse Specialist Providers in US
49
States with Adult Health Clinical Nurse Specialist
1,088
Avg Claims per Provider
Cynthia Armstrong, ANP's 4,152 claims are above the specialty average of 1,088.
Nationwide Adult Health Clinical Nurse Specialist peers with similar MIPS or enrollment year
Two federal-record peer sets for Armstrong, both outside Arizona so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2010)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Adult Health Clinical Nurse Specialist Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Armstrong.
One of 10 Adult Health Clinical Nurse Specialist providers enrolled in Arizona, 5 are shown here.
Kristin Altman
Glendale, AZ
Dr. Kristi Barthelmess
MSN, APRN, ACNS-BC
Phoenix, AZ
Dr. Eva Boldea
M.S.N.-ACNS
Phoenix, AZ
Dr. Linda Clayton-Dhennin
RN, AGCNS-BC
Phoenix, AZ
Dr. Justin Cooper
PHYSICIAN ASSISTANT
Chandler, AZ
Compare Adult Health Clinical Nurse Specialist nationally: see state-by-state distribution →
Frequently Asked Questions
What is Cynthia Armstrong, ANP's specialty? ▼
Cynthia Armstrong, ANP specializes in Adult Health Clinical Nurse Specialist and practices in Phoenix, Arizona. Credentials: ANP.
How much does Cynthia Armstrong, ANP prescribe under Medicare Part D? ▼
In 2023, Cynthia Armstrong, ANP wrote 4,152 Medicare Part D claims totaling $234K in drug costs for 201 beneficiaries.
Where is Cynthia Armstrong, ANP located? ▼
Cynthia Armstrong, ANP is located at 2510 W DUNLAP AVE STE 290, Phoenix, AZ, 85021. Phone: (602) 789-0344.
What is Cynthia Armstrong, ANP's NPI number? ▼
Cynthia Armstrong, ANP's National Provider Identifier (NPI) is 1790009660, issued on 03/22/2010.
Does Cynthia Armstrong, ANP prescribe more brand-name or generic drugs? ▼
Cynthia Armstrong, ANP's prescribing is 11% brand-name and 88% generic drugs by claim count, with $155K in brand drug costs.
Does Cynthia Armstrong, ANP prescribe opioids? ▼
Yes, Cynthia Armstrong, ANP had 15 opioid claims in 2023 with an opioid prescribing rate of 0.4%.
How many Adult Health Clinical Nurse Specialist providers are there in the US? ▼
There are 1,379 Adult Health Clinical Nurse Specialist providers across 49 states in the US. The average Adult Health Clinical Nurse Specialist provider writes 1,088 Medicare Part D claims per year.
What drugs does Cynthia Armstrong, ANP prescribe most often? ▼
Based on 2023 Medicare Part D data, Cynthia Armstrong, ANP's most frequently prescribed drugs include Levothyroxine Sodium, Atorvastatin Calcium, Donepezil Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Cynthia Armstrong, ANP accept Medicare? ▼
Cynthia Armstrong, ANP appears in CMS Medicare data with 4,152 Part D claims and 201 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Cynthia Armstrong, ANP's credentials? ▼
Cynthia Armstrong, ANP's NPI is 1790009660 with credentials ANP. 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.