2026 NPPES data Internal Medicine Physician NPI 1427431881 M.D.
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ANGEL ARIZMENDI, M.D.

Internal Medicine Physician in BAYAMON, 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
22K
Medicare Part D claims · 871 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.4K
25 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: ANGEL ARIZMENDI, M.D. is a Internal Medicine Physician ([object Object]) practicing in BAYAMON, Puerto Rico with a Medicare Part D prescribing footprint of 22K claims across 871 beneficiaries — 10% brand-name prescribing . Industry payments of $1.4K across 25 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: ANGEL ARIZMENDI, M.D. filed 22,015 Medicare Part D claims in 2023 across BAYAMON, Puerto Rico. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

ANGEL ARIZMENDI, M.D. 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).

ANGEL ARIZMENDI, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 07/02/2015

NPI 1427431881

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

22,015 711% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Puerto Rico

How Internal Medicine Physician compares to other specialties among Puerto Rico providers

Puerto Rico providers

Internal Medicine Physician share within Puerto Rico

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

Specialty board-certification context

Estimated specialty board-certified rate — Internal Medicine Physician (ABMS / AOA reference)

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

Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Internal Medicine 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).

ANGEL ARIZMENDI, M.D. is a Internal Medicine Physician provider practicing in BAYAMON, Puerto Rico, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1427431881. 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.

ANGEL ARIZMENDI, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 1845 CARR 2, BAYAMON, PR, 00959, with a listed phone of (787) 269-3015. NPI 1427431881 was issued on 07/02/2015. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ARIZMENDI 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 22,015 prescription claims written by this provider, covering 871 Medicare beneficiaries and totaling roughly $1.1 million in drug spend, split 10% brand-name and 90% generic by claim count. 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

1845 CARR 2
BAYAMON, PR 00959

Provider Details

NPI 1427431881
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 07/02/2015

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 ANGEL ARIZMENDI, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$1.4K

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

ANGEL ARIZMENDI, M.D. — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 22,015 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.

22,015
Total Claims
$1.1M
Total Drug Cost
871
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
30,293
Total Day Supply
890,862
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$817K
Generic Drug Cost
$321K
Antibiotic Claims
61

Patient Demographics

Average Patient Age
72.3 years
Avg HCC Risk Score
3.42
Gender Split
65% female / 35% male
Age Distribution
<65: 111, 65-74: 423, 75-84: 252, 85+: 85

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Gabapentin
1,811
Losartan Potassium
1,211
Rosuvastatin Calcium
1,130
Atorvastatin Calcium
1,004
Famotidine
878
Amlodipine Besylate
712
Montelukast Sodium
679
Metformin Hcl
592
Metoprolol Succinate
585
Synthroid
Levothyroxine Sodium
582

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

Internal Medicine Physician Overview

How ANGEL ARIZMENDI, M.D. fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

ANGEL ARIZMENDI, M.D.'s 22,015 claims are above the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Puerto Rico

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

Compare Internal Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ANGEL ARIZMENDI, M.D.'s specialty?
ANGEL ARIZMENDI, M.D. specializes in Internal Medicine Physician and practices in BAYAMON, Puerto Rico. Credentials: M.D..
How much does ANGEL ARIZMENDI, M.D. prescribe under Medicare Part D?
In 2023, ANGEL ARIZMENDI, M.D. wrote 22,015 Medicare Part D claims totaling $1.1M in drug costs for 871 beneficiaries.
Where is ANGEL ARIZMENDI, M.D. located?
ANGEL ARIZMENDI, M.D. is located at 1845 CARR 2, BAYAMON, PR, 00959. Phone: (787) 269-3015.
What is ANGEL ARIZMENDI, M.D.'s NPI number?
ANGEL ARIZMENDI, M.D.'s National Provider Identifier (NPI) is 1427431881, issued on 07/02/2015.
Does ANGEL ARIZMENDI, M.D. prescribe more brand-name or generic drugs?
ANGEL ARIZMENDI, M.D.'s prescribing is 10% brand-name and 90% generic drugs by claim count, with $817K in brand drug costs.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does ANGEL ARIZMENDI, M.D. prescribe most often?
Based on 2023 Medicare Part D data, ANGEL ARIZMENDI, M.D.'s most frequently prescribed drugs include Gabapentin, Losartan Potassium, Rosuvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ANGEL ARIZMENDI, M.D. accept Medicare?
ANGEL ARIZMENDI, M.D. appears in CMS Medicare data with 22,015 Part D claims and 871 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ANGEL ARIZMENDI, M.D.'s credentials?
ANGEL ARIZMENDI, M.D.'s NPI is 1427431881 with credentials M.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

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