NPI registry status
Active
2026 NPPES data Pharmacist NPI 1053888651 PHARM.D.
Verify on CMS → Allison Fonseca, PHARM.D.
Pharmacist in San Juan, Puerto Rico.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 291,043 in Pharmacist, 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
389
Medicare Part D claims · 335 beneficiaries · Pharmacist avg: 135
Generic prescribing
0%
generic claims · >99% 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
Allison Fonseca, PHARM.D. filed 389 Medicare Part D claims in 2023 as a Pharmacist in San Juan, Puerto Rico, prescribing 0% generic.
- 389
- Part D claims, 2023
- 0%
- 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.
Allison Fonseca, PHARM.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
389 Top 43% higher than 57% 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 Allison Fonseca, PHARM.D.?
Quality data not reportedPrimary specialty
Pharmacist
Medicare Part D claims
389 188% vs specialty avg
Specialty distribution in Puerto Rico
How Pharmacist compares to other specialties among Puerto Rico 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 Pharmacist. 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).
Allison Fonseca, PHARM.D. appears in the CMS NPPES registry as a Pharmacist provider holding PHARM.D. credentials at 1115 AVE 65 INFANTERIA, San Juan, PR, 00924, with a listed phone of (787) 768-4700. NPI 1053888651 was issued on 11/01/2018.
Medicare Part D records for calendar year 2023 show 389 prescription claims written by this provider, covering 335 Medicare beneficiaries and totaling roughly $85K in drug spend, split >99% brand-name and 0% generic by claim count.
Pharmacist is a high-volume specialty nationwide, with 291,043 enrolled providers across 56 states and an average of 135 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 | 1053888651 |
|---|---|
| Specialty | Pharmacist |
| Credentials | PHARM.D. |
| Gender | Female |
| NPI Issued | 11/01/2018 |
Brand vs generic prescribing mix · Brand-heavy
Allison Fonseca, PHARM.D. - brand share 99.0%
Pharmacist average
>99% brand-name claims vs 0% generic, on 389 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.
389
Total Claims
$85K
Total Drug Cost
335
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 389
- Total Day Supply
- 476
- Brand vs Generic
- >99% brand / 0% generic
- Brand Drug Cost
- $85K
Patient Demographics
- Average Patient Age
- 73.9 years
- Avg HCC Risk Score
- 1.58
- Gender Split
- 59% female / 41% male
- Age Distribution
- <65: 32, 65-74: 148, 75-84: 122, 85+: 33
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Shingrix Varicella-Zoster Ge/As01b/Pf | 204 |
| Arexvy Rsvpref3 Antigen/As01e/Pf | 26 |
| Abrysvo "Rsv Vacc | N/A |
| Boostrix Tdap "Diphth | N/A |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Pharmacist Overview
How Allison Fonseca, PHARM.D. fits within the Pharmacist landscape nationally.
291,043
Pharmacist Providers in US
56
States with Pharmacist
135
Avg Claims per Provider
Allison Fonseca, PHARM.D.'s 389 claims are above the specialty average of 135.
Nearby Pharmacist Providers in Puerto Rico
Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as Fonseca.
Dr. Gilda Abad
RPH
San Juan, PR
Dr. Hiba Aboukheir
PHARMD
Rio Grande, PR
Dr. Nicole Abrams Santiago
PHARMD
San Juan, PR
Dr. Damaris Abreu
RPH
Isabela, PR
Dr. Sonia Abreu
RPH
Isabela, PR
Compare Pharmacist 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 Puerto Rico medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Pharmacist 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.
Healthcare Guides
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How to Find a Doctor
Step-by-step guide to choosing a provider
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Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Puerto Rico
Frequently Asked Questions
What is Allison Fonseca, PHARM.D.'s specialty? ▼
Allison Fonseca, PHARM.D. specializes in Pharmacist and practices in San Juan, Puerto Rico. Credentials: PHARM.D..
How much does Allison Fonseca, PHARM.D. prescribe under Medicare Part D? ▼
In 2023, Allison Fonseca, PHARM.D. wrote 389 Medicare Part D claims totaling $85K in drug costs for 335 beneficiaries.
Where is Allison Fonseca, PHARM.D. located? ▼
Allison Fonseca, PHARM.D. is located at 1115 AVE 65 INFANTERIA, San Juan, PR, 00924. Phone: (787) 768-4700.
What is Allison Fonseca, PHARM.D.'s NPI number? ▼
Allison Fonseca, PHARM.D.'s National Provider Identifier (NPI) is 1053888651, issued on 11/01/2018.
Does Allison Fonseca, PHARM.D. prescribe more brand-name or generic drugs? ▼
Allison Fonseca, PHARM.D.'s prescribing is >99% brand-name and 0% generic drugs by claim count, with $85K in brand drug costs.
How many Pharmacist providers are there in the US? ▼
There are 291,043 Pharmacist providers across 56 states in the US. The average Pharmacist provider writes 135 Medicare Part D claims per year.
What drugs does Allison Fonseca, PHARM.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Allison Fonseca, PHARM.D.'s most frequently prescribed drugs include Shingrix, Arexvy, Abrysvo. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Allison Fonseca, PHARM.D. accept Medicare? ▼
Allison Fonseca, PHARM.D. appears in CMS Medicare data with 389 Part D claims and 335 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Allison Fonseca, PHARM.D.'s credentials? ▼
Allison Fonseca, PHARM.D.'s NPI is 1053888651 with credentials PHARM.D.. 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.