Dr. Alfredo Ayala Diaz, MD
- Part D claims, 2024
- 197
- Hospital affiliations
- 1
- Industry payments
- $289
- State license
- 1
- Year NPI issued
- 2016
- Practice address
- 371 De Diego Ave, San Juan, PR 00923
- Practice phone
- Call (787) 767-5100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Alfredo Ayala Diaz is a general practice physician in San Juan, Puerto Rico
Dr. Ayala Diaz practices at Hospital San Francisco in San Juan, Puerto Rico, part of Metro Pavia Health System.
Dr. Ayala Diaz's NPI, 1518317692, was assigned on June 20, 2016. Dr. Ayala Diaz holds Puerto Rico license 22229.
- NPI
- 1518317692NPI Registry (opens in a new tab)
- NPI enumeration date
- June 20, 2016
- NPI status
- Active
- Practice phone
- (787) 767-5100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Alfredo Ayala Diaz practices at 2 locations in San Juan, Puerto Rico
Dr. Ayala Diaz's primary practice is Hospital San Francisco, at 371 De Diego Ave, San Juan, PR 00923 in San Juan County. The practice phone is (787) 767-5100. Dr. Ayala Diaz also practices at Hospital San Francisco, 405 De Diego, San Juan, PR 00923.
- Hospital San FranciscoPrimary371 De Diego Ave, San Juan, PR 00923 · San Juan CountyPhone(787) 767-5100
- Hospital San Francisco405 De Diego, San Juan, PR 00923 · San Juan CountyPhone(787) 767-5100
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Alfredo Ayala Diaz is affiliated with 1 site of care
Dr. Ayala Diaz's primary practice is Hospital San Francisco in San Juan, Puerto Rico, part of Metro Pavia Health System.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Alfredo Ayala Diaz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ayala Diaz practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hospital San Francisco | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Alfredo Ayala Diaz is one of 2,604 general practice physicians in Puerto Rico
General practice is Dr. Ayala Diaz's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dr. Ayala Diaz is licensed in Puerto Rico.
Specialties and state licenses
- General practice, Puerto RicoPrimary
General practice physicians near Dr. Ayala Diaz
Counts of general practice physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Alfredo Ayala Diaz's patients have a median age of 28
Across all payers, Dmand AI patient panel data puts Dr. Ayala Diaz's median patient age at 28, with 50% women.
Dr. Ayala Diaz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 28
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Alfredo Ayala Diaz wrote 197 Medicare Part D claims in 2024
In 2024, Dr. Ayala Diaz wrote 197 Medicare Part D claims for 113 patients. 97% of them were for generic drugs. CMS names the drug for 128 of them, across 7 drugs with 11 or more claims each, at $1,043 in total drug cost. In 2023, CMS named 85 claims across 4 drugs.
Dr. Ayala Diaz's Part D claims by kind of drug, 2024
- Generic191 claims97%
- Brand-name and other6 claims3%
Dr. Ayala Diaz's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Ayala Diaz's Part D claims, 2024
- Antibiotics34%66 of 197 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 852024: 12851%
Drugs named by CMS: 7 in 2024, 4 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Alfredo Ayala Diaz received $289 in industry payments in 2022
CMS Open Payments shows 3 general payments to Dr. Ayala Diaz from 2 drug and device companies in 2022. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $189.
Companies that paid Dr. Ayala Diaz the most, 2022 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Alfredo Ayala Diaz's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Alfredo Ayala Diaz
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What is Dr. Alfredo Ayala Diaz's NPI number?
Dr. Alfredo Ayala Diaz's NPI number is 1518317692. It was assigned on June 20, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Alfredo Ayala Diaz?
Dr. Alfredo Ayala Diaz is a general practice physician in San Juan, Puerto Rico. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. Alfredo Ayala Diaz practice?
Dr. Ayala Diaz practices at 371 De Diego Ave, San Juan, PR 00923. Dr. Ayala Diaz also practices at 405 De Diego, San Juan, PR 00923. Dr. Ayala Diaz's primary practice is Hospital San Francisco in San Juan, Puerto Rico, part of Metro Pavia Health System.
What is Dr. Alfredo Ayala Diaz's office phone number?
The practice phone on file for Dr. Ayala Diaz is (787) 767-5100.
What is Dr. Alfredo Ayala Diaz's medical license number?
Dr. Ayala Diaz holds Puerto Rico license 22229.
Which hospitals is Dr. Alfredo Ayala Diaz affiliated with?
Dr. Ayala Diaz practices at Hospital San Francisco in San Juan, Puerto Rico.
What drugs does Dr. Alfredo Ayala Diaz prescribe most?
In 2024 Medicare Part D data, Dr. Ayala Diaz's most prescribed drugs by claims were Famotidine, Pantoprazole Sodium and Azithromycin.
Has Dr. Alfredo Ayala Diaz received payments from drug or device companies?
CMS Open Payments shows $289 in general payments to Dr. Ayala Diaz from 2 companies from 2022 to 2022. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Alfredo Ayala Diaz been practicing?
Dr. Ayala Diaz's NPI was assigned in 2016.
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