Alfredo Ayala Diaz, M.D.
NPI 1518317692 · General Practice Physician · San Juan, PR
Enrolled with Medicare as Practitioner - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alfredo Ayala Diaz, M.D. is a General Practice Physician provider in San Juan, PR (NPI 1518317692).
Provider details
- NPI number
- 1518317692
- Entity type
- Individual
- Primary specialty
- General Practice PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 22229 (PR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Famotidine | 33 | 33 |
| Pantoprazole Sodium | 22 | 22 |
| Azithromycin | 18 | 18 |
| Clindamycin Hcl | 15 | 15 |
| Ketorolac Tromethamine | 14 | 14 |
| Ondansetron Hcl | 14 | 14 |
| Methylprednisolone | 12 | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-06-20
- Last updated
- 2024-08-06
- Certified
- 2024-07-31
Frequently asked questions
- What is Alfredo Ayala Diaz's NPI number?
- Alfredo Ayala Diaz's National Provider Identifier (NPI) is 1518317692, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alfredo Ayala Diaz's specialty?
- Alfredo Ayala Diaz is listed in the NPPES registry with a primary specialty of General Practice Physician (Allopathic & Osteopathic Physicians).
- Where is Alfredo Ayala Diaz located?
- Alfredo Ayala Diaz's practice location on file with NPPES is 150 Jose De Diego Ave, San Juan, PR 00907.
- What is Alfredo Ayala Diaz's phone number?
- The practice phone number listed in the NPPES registry for Alfredo Ayala Diaz is (787) 230-7557.
- Does Alfredo Ayala Diaz accept Medicare?
- Alfredo Ayala Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alfredo Ayala Diaz's NPI active?
- Yes — Alfredo Ayala Diaz's NPI (1518317692) is active in the NPPES registry as of the last update on 2024-08-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.