NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1245615319
Verify on CMS → Alex Alonso
Physician Assistant in Anchorage, Alaska.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 150,974 in Physician Assistant, 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 · 319 beneficiaries · Physician Assistant avg: 790
Generic prescribing
86%
generic claims · 13% 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
Alex Alonso filed 4,355 Medicare Part D claims in 2023 as a Physician Assistant in Anchorage, Alaska, prescribing 86% generic.
- 4K
- Part D claims, 2023
- 86%
- 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.
Alex Alonso's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
4,355 Top 8% higher than 92% 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 Alex Alonso?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
4,355 6× vs specialty avg
Specialty distribution in Alaska
How Physician Assistant compares to other specialties among Alaska 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 Physician Assistant. 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).
Alex Alonso appears in the CMS NPPES registry as a Physician Assistant provider at 4951 BUSINESS PARK BLVD, Anchorage, AK, 99503, with a listed phone of (907) 743-7200. NPI 1245615319 was issued on 07/30/2015.
Medicare Part D records for calendar year 2023 show 4,355 prescription claims written by this provider, covering 319 Medicare beneficiaries and totaling roughly $574K in drug spend, split 13% brand-name and 86% generic by claim count, with an opioid prescribing rate of 0.8%.
Physician Assistant is a high-volume specialty nationwide, with 150,974 enrolled providers across 56 states and an average of 790 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 | 1245615319 |
|---|---|
| Specialty | Physician Assistant |
| Gender | Male |
| NPI Issued | 07/30/2015 |
Hospital and facility affiliations
Facilities where Alex Alonso 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.
Anchorage Neighborhood Health Center Inc
Anchorage, AK
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
Alex Alonso - brand share 13.0%
Physician Assistant average
13% brand-name claims vs 86% generic, on 4,355 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.
4,355
Total Claims
$574K
Total Drug Cost
319
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 8,145
- Total Day Supply
- 215,123
- Brand vs Generic
- 13% brand / 86% generic
- Brand Drug Cost
- $488K
- Generic Drug Cost
- $84K
- Opioid Claims
- 33 (0.8% rate)
- Antibiotic Claims
- 30
Patient Demographics
- Average Patient Age
- 68.5 years
- Avg HCC Risk Score
- 1.10
- Gender Split
- 40% female / 60% male
- Age Distribution
- <65: 75, 65-74: 169, 75-84: 54, 85+: 21
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Alex Alonso prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
338 claims
- Amlodipine Besylate
Amlodipine Besylate
218 claims
- Metformin Hcl
Metformin Hcl
213 claims
- Tamsulosin Hcl
Tamsulosin Hcl
192 claims
- Metoprolol Succinate
Metoprolol Succinate
178 claims
- Losartan Potassium
Losartan Potassium
171 claims
- Lisinopril
Lisinopril
170 claims
- Omeprazole 111
Omeprazole
111 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 338 |
| Amlodipine Besylate | 218 |
| Metformin Hcl | 213 |
| Tamsulosin Hcl | 192 |
| Metoprolol Succinate | 178 |
| Losartan Potassium | 171 |
| Lisinopril | 170 |
| Omeprazole | 111 |
| Levothyroxine Sodium | 97 |
| Risperidone | 76 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How Alex Alonso fits within the Physician Assistant landscape nationally.
150,974
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
Alex Alonso's 4,355 claims are above the specialty average of 790.
Nearby Physician Assistant Providers in Alaska
Other clinicians with the same primary specialty enrolled in Alaska, drawn from the same CMS NPPES roster as Alonso.
Dr. Juliana Abreu
P.A.
Anchorage, AK
Dr. Katherine Alexander
PA-C
Anchorage, AK
Dr. Andrea Allen
PA-C
Anchorage, AK
Dr. Benjamin Allumbaugh
PA-C
Joint Base Elmendorf Richardson, AK
Dr. Sean Allworth
PA-C
Fort Wainwright, AK
Compare Physician Assistant 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 Alaska medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Physician Assistant 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 Alex Alonso's specialty? ▼
Alex Alonso specializes in Physician Assistant and practices in Anchorage, Alaska.
How much does Alex Alonso prescribe under Medicare Part D? ▼
In 2023, Alex Alonso wrote 4,355 Medicare Part D claims totaling $574K in drug costs for 319 beneficiaries.
Where is Alex Alonso located? ▼
Alex Alonso is located at 4951 BUSINESS PARK BLVD, Anchorage, AK, 99503. Phone: (907) 743-7200.
What is Alex Alonso's NPI number? ▼
Alex Alonso's National Provider Identifier (NPI) is 1245615319, issued on 07/30/2015.
Does Alex Alonso prescribe more brand-name or generic drugs? ▼
Alex Alonso's prescribing is 13% brand-name and 86% generic drugs by claim count, with $488K in brand drug costs.
Does Alex Alonso prescribe opioids? ▼
Yes, Alex Alonso had 33 opioid claims in 2023 with an opioid prescribing rate of 0.8%.
How many Physician Assistant providers are there in the US? ▼
There are 150,974 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does Alex Alonso prescribe most often? ▼
Based on 2023 Medicare Part D data, Alex Alonso's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Alex Alonso accept Medicare? ▼
Alex Alonso appears in CMS Medicare data with 4,355 Part D claims and 319 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Alex Alonso's credentials? ▼
Alex Alonso's NPI is 1245615319. 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.