Guillermo Marrero MD PA
NPI 1477845303 · Internal Medicine Physician · Oviedo, FL
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Guillermo Marrero MD PA is a Internal Medicine Physician organization in Oviedo, FL (NPI 1477845303).
Provider details
- NPI number
- 1477845303
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Guillermo Marrero, Director(407) 971-1970
- License
- ME0074991 (FL)
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
15 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
Other names (DBA / former)
- Doing business as
- Oviedo Healthcare
Registry dates
- Enumerated
- 2011-05-11
- Last updated
- 2011-05-11
Frequently asked questions
- What is Guillermo Marrero MD PA's NPI number?
- Guillermo Marrero MD PA's National Provider Identifier (NPI) is 1477845303, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Guillermo Marrero MD PA?
- Guillermo Marrero MD PA is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Guillermo Marrero MD PA located?
- Guillermo Marrero MD PA's practice location on file with NPPES is 1000 Executive Dr, Oviedo, FL 32765-8140.
- What is Guillermo Marrero MD PA's phone number?
- The practice phone number listed in the NPPES registry for Guillermo Marrero MD PA is (407) 971-1970.
- Does Guillermo Marrero MD PA accept Medicare?
- Guillermo Marrero MD PA is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Guillermo Marrero MD PA?
- The authorized official listed on Guillermo Marrero MD PA's NPPES record is Guillermo Marrero, Director. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Guillermo Marrero MD PA's NPI active?
- Yes — Guillermo Marrero MD PA's NPI (1477845303) is active in the NPPES registry as of the last update on 2011-05-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.