2026 NPPES data Internal Medicine Physician NPI 1538102264 M.D.
Verify on CMS →

JOSE AYALA, 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
20K
Medicare Part D claims · 1K beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$48.18
2 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: JOSE AYALA, M.D. is a Internal Medicine Physician ([object Object]) practicing in BAYAMON, Puerto Rico with a Medicare Part D prescribing footprint of 20K claims across 1K beneficiaries — 11% brand-name prescribing . Industry payments of $48.18 across 2 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: JOSE AYALA, M.D. filed 19,657 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)

JOSE AYALA, 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).

JOSE AYALA, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 06/13/2006

NPI 1538102264

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

19,657 624% 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).

JOSE AYALA, 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: 1538102264. 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.

JOSE AYALA, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 100 PASEO SAN PABLO, BAYAMON, PR, 00961, with a listed phone of (787) 740-2925. NPI 1538102264 was issued on 06/13/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what AYALA 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 19,657 prescription claims written by this provider, covering 1,022 Medicare beneficiaries and totaling roughly $944K in drug spend, split 11% brand-name and 89% 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

100 PASEO SAN PABLO
BAYAMON, PR 00961

Provider Details

NPI 1538102264
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 06/13/2006

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 JOSE AYALA, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$48

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

JOSE AYALA, M.D. — brand share 11.0%
Specialty average (est.)

11% brand-name claims vs 89% generic, on 19,657 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.

19,657
Total Claims
$944K
Total Drug Cost
1,022
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
43,752
Total Day Supply
1,295,394
Brand vs Generic
11% brand / 89% generic
Brand Drug Cost
$668K
Generic Drug Cost
$262K
Antibiotic Claims
245

Patient Demographics

Average Patient Age
74.7 years
Avg HCC Risk Score
1.82
Gender Split
59% female / 41% male
Age Distribution
<65: 98, 65-74: 411, 75-84: 363, 85+: 150

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Atorvastatin Calcium
1,911
Amlodipine Besylate
1,070
Gabapentin
793
Losartan Potassium
758
Levothyroxine Sodium
731
Humulin N
Insulin Nph Human Isophane
712
Metoprolol Succinate
705
Diclofenac Sodium
624
Montelukast Sodium
562
Metformin Hcl
548

* 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 JOSE AYALA, 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

JOSE AYALA, M.D.'s 19,657 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 AYALA.

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

Frequently Asked Questions

What is JOSE AYALA, M.D.'s specialty?
JOSE AYALA, M.D. specializes in Internal Medicine Physician and practices in BAYAMON, Puerto Rico. Credentials: M.D..
How much does JOSE AYALA, M.D. prescribe under Medicare Part D?
In 2023, JOSE AYALA, M.D. wrote 19,657 Medicare Part D claims totaling $944K in drug costs for 1,022 beneficiaries.
Where is JOSE AYALA, M.D. located?
JOSE AYALA, M.D. is located at 100 PASEO SAN PABLO, BAYAMON, PR, 00961. Phone: (787) 740-2925.
What is JOSE AYALA, M.D.'s NPI number?
JOSE AYALA, M.D.'s National Provider Identifier (NPI) is 1538102264, issued on 06/13/2006.
Does JOSE AYALA, M.D. prescribe more brand-name or generic drugs?
JOSE AYALA, M.D.'s prescribing is 11% brand-name and 89% generic drugs by claim count, with $668K 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 JOSE AYALA, M.D. prescribe most often?
Based on 2023 Medicare Part D data, JOSE AYALA, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JOSE AYALA, M.D. accept Medicare?
JOSE AYALA, M.D. appears in CMS Medicare data with 19,657 Part D claims and 1,022 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JOSE AYALA, M.D.'s credentials?
JOSE AYALA, M.D.'s NPI is 1538102264 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