Ernesto Marrero, MSN, FNP
NPI 1104428416 · Nurse Practitioner · Round Rock, TX
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ernesto Marrero, MSN, FNP is a Nurse Practitioner provider in Round Rock, TX (NPI 1104428416).
Provider details
- NPI number
- 1104428416
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MSN, FNP
- Sex
- Male
- Sole proprietor
- Yes
- License
- F11200009 (TX)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 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 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 50 | 39 |
| Atorvastatin Calcium | 30 | 20 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 26 | 16 |
| Amlodipine Besylate | 22 | 12 |
| Metformin Hcl | 20 | 11 |
| Cyclobenzaprine Hcl | 19 | 14 |
| Ondansetronbrand: Ondansetron Odt |
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-11-11
- Last updated
- 2023-09-29
- Certified
- 2023-09-29
Frequently asked questions
- What is Ernesto Marrero's NPI number?
- Ernesto Marrero's National Provider Identifier (NPI) is 1104428416, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ernesto Marrero's specialty?
- Ernesto Marrero is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Ernesto Marrero located?
- Ernesto Marrero's practice location on file with NPPES is 2631 Gattis School Rd Ste 150, Round Rock, TX 78664-2825.
- What is Ernesto Marrero's phone number?
- The practice phone number listed in the NPPES registry for Ernesto Marrero is (512) 243-5872.
- Does Ernesto Marrero accept Medicare?
- Ernesto Marrero is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ernesto Marrero's NPI active?
- Yes — Ernesto Marrero's NPI (1104428416) is active in the NPPES registry as of the last update on 2023-09-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.