2026 NPPES data General Practice Physician NPI 1023594751 MD
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JUAN FANTAUZZI, MD

General Practice Physician in ISABELA, Puerto Rico. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
610
Medicare Part D claims · 324 beneficiaries · General Practice Physician avg: 3K
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$177.11
2 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: JUAN FANTAUZZI, MD is a General Practice Physician ([object Object]) practicing in ISABELA, Puerto Rico with a Medicare Part D prescribing footprint of 610 claims across 324 beneficiaries — 8% brand-name prescribing . Industry payments of $177.11 across 2 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: JUAN FANTAUZZI, MD filed 610 Medicare Part D claims in 2023 across ISABELA, Puerto Rico. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

JUAN FANTAUZZI, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

JUAN FANTAUZZI, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 07/16/2018

NPI 1023594751

Primary specialty

General Practice Physician

Mid-sized

16,677 US NPIs in this specialty

Medicare Part D claims

610 79% vs specialty avg

2023 prescription claims

Specialty avg: 2,872

Specialty distribution in Puerto Rico

How General Practice Physician compares to other specialties among Puerto Rico providers

Puerto Rico providers

General Practice Physician share within Puerto Rico

1. General Practice Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
General Practice Physician share within Puerto Rico

Specialty board-certification context

Estimated specialty board-certified rate — General Practice Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
General Practice Physician ABMS/AOA estimate

Est. board-certified rate (General Practice Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (General Practice Physician) — ABMS / AOA estimate

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).

JUAN FANTAUZZI, MD is a General Practice Physician provider practicing in ISABELA, Puerto Rico, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1023594751. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

JUAN FANTAUZZI, MD appears in the CMS NPPES registry as a General Practice Physician provider holding MD credentials at CARR 112 INT, ISABELA, PR, 00662, with a listed phone of (787) 234-3729. NPI 1023594751 was issued on 07/16/2018. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FANTAUZZI most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 610 prescription claims written by this provider, covering 324 Medicare beneficiaries and totaling roughly $12K in drug spend, split 8% brand-name and 92% generic by claim count, with an opioid prescribing rate of 6.7%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

General Practice Physician is a mid-sized specialty nationwide, with 16,677 enrolled providers across 56 states and an average of 2,872 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

CARR 112 INT
ISABELA, PR 00662

Provider Details

NPI 1023594751
Specialty General Practice Physician
Credentials MD
Gender Male
NPI Issued 07/16/2018

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 JUAN FANTAUZZI, MD. Source: openpaymentsdata.cms.gov.

Total received

$177

Largest payer

Janssen Pharmaceuticals, Inc

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 · Generic-heavy

JUAN FANTAUZZI, MD — brand share 8.0%
Specialty average (est.)

8% brand-name claims vs 92% generic, on 610 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.

610
Total Claims
$12K
Total Drug Cost
324
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
625
Total Day Supply
7,455
Brand vs Generic
8% brand / 92% generic
Brand Drug Cost
$6K
Generic Drug Cost
$6K
Opioid Claims
41 (6.7% rate)
Antibiotic Claims
110

Patient Demographics

Average Patient Age
72.3 years
Avg HCC Risk Score
2.12
Gender Split
63% female / 37% male
Age Distribution
<65: 58, 65-74: 128, 75-84: 90, 85+: 48

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Famotidine
76
Methylprednisolone
57
Celecoxib
51
Sucralfate
37
Gabapentin
32
Tramadol Hcl-Acetaminophen
Tramadol Hcl/Acetaminophen
32
Levofloxacin
25
Ciprofloxacin Hcl
16
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
14
Metronidazole
14

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

General Practice Physician Overview

How JUAN FANTAUZZI, MD fits within the General Practice Physician landscape nationally.

16,677
General Practice Physician Providers in US
56
States with General Practice Physician
2,872
Avg Claims per Provider

JUAN FANTAUZZI, MD's 610 claims are below the specialty average of 2,872.

Nearby General Practice Physician Providers in Puerto Rico

Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as FANTAUZZI.

Compare General Practice Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JUAN FANTAUZZI, MD's specialty?
JUAN FANTAUZZI, MD specializes in General Practice Physician and practices in ISABELA, Puerto Rico. Credentials: MD.
How much does JUAN FANTAUZZI, MD prescribe under Medicare Part D?
In 2023, JUAN FANTAUZZI, MD wrote 610 Medicare Part D claims totaling $12K in drug costs for 324 beneficiaries.
Where is JUAN FANTAUZZI, MD located?
JUAN FANTAUZZI, MD is located at CARR 112 INT, ISABELA, PR, 00662. Phone: (787) 234-3729.
What is JUAN FANTAUZZI, MD's NPI number?
JUAN FANTAUZZI, MD's National Provider Identifier (NPI) is 1023594751, issued on 07/16/2018.
Does JUAN FANTAUZZI, MD prescribe more brand-name or generic drugs?
JUAN FANTAUZZI, MD's prescribing is 8% brand-name and 92% generic drugs by claim count, with $6K in brand drug costs.
Does JUAN FANTAUZZI, MD prescribe opioids?
Yes, JUAN FANTAUZZI, MD had 41 opioid claims in 2023 with an opioid prescribing rate of 6.7%.
How many General Practice Physician providers are there in the US?
There are 16,677 General Practice Physician providers across 56 states in the US. The average General Practice Physician provider writes 2,872 Medicare Part D claims per year.
What drugs does JUAN FANTAUZZI, MD prescribe most often?
Based on 2023 Medicare Part D data, JUAN FANTAUZZI, MD's most frequently prescribed drugs include Famotidine, Methylprednisolone, Celecoxib. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JUAN FANTAUZZI, MD accept Medicare?
JUAN FANTAUZZI, MD appears in CMS Medicare data with 610 Part D claims and 324 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JUAN FANTAUZZI, MD's credentials?
JUAN FANTAUZZI, MD's NPI is 1023594751 with credentials MD. 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

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