Mervin De Guzman Diaz, MD
NPI 1548876121 · General Practice Physician · Humacao, PR
Enrolled with Medicare as Practitioner - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mervin De Guzman Diaz, MD is a General Practice Physician provider in Humacao, PR (NPI 1548876121).
Provider details
- NPI number
- 1548876121
- Entity type
- Individual
- Primary specialty
- General Practice PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 24685 (PR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
5 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$116 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-09-19
- Last updated
- 2026-05-24
- Certified
- 2026-05-24
Frequently asked questions
- What is Mervin De Guzman Diaz's NPI number?
- Mervin De Guzman Diaz's National Provider Identifier (NPI) is 1548876121, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mervin De Guzman Diaz's specialty?
- Mervin De Guzman Diaz is listed in the NPPES registry with a primary specialty of General Practice Physician (Allopathic & Osteopathic Physicians).
- Where is Mervin De Guzman Diaz located?
- Mervin De Guzman Diaz's practice location on file with NPPES is 355 Calle Font Martelo, Humacao, PR 00791-3249.
- What is Mervin De Guzman Diaz's phone number?
- The practice phone number listed in the NPPES registry for Mervin De Guzman Diaz is (787) 852-0768.
- Does Mervin De Guzman Diaz accept Medicare?
- Mervin De Guzman Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mervin De Guzman Diaz's NPI active?
- Yes — Mervin De Guzman Diaz's NPI (1548876121) is active in the NPPES registry as of the last update on 2026-05-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.