Guillermo Armaiz, M.D.
NPI 1598740920 · Internal Medicine Physician · Vega Baja, PR
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Guillermo Armaiz, M.D. is a Internal Medicine Physician provider in Vega Baja, PR (NPI 1598740920).
Provider details
- NPI number
- 1598740920
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 6843 (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
20 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-08
- Last updated
- 2009-12-17
Frequently asked questions
- What is Guillermo Armaiz's NPI number?
- Guillermo Armaiz's National Provider Identifier (NPI) is 1598740920, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Guillermo Armaiz's specialty?
- Guillermo Armaiz is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Guillermo Armaiz located?
- Guillermo Armaiz's practice location on file with NPPES is 50 Jose J Acosta St, Vega Baja, PR 00693.
- What is Guillermo Armaiz's phone number?
- The practice phone number listed in the NPPES registry for Guillermo Armaiz is (787) 858-6077.
- Does Guillermo Armaiz accept Medicare?
- Guillermo Armaiz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Guillermo Armaiz's NPI active?
- Yes — Guillermo Armaiz's NPI (1598740920) is active in the NPPES registry as of the last update on 2009-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.