Ernesto Marrero, MSN, FNP
Nurse Practitioner · Round Rock, TX
Ernesto Marrero, MSN, FNP is a nurse practitioner with a practice address in Round Rock, Texas, and NPI 1104428416, issued on Nov 11, 2020. Check the license (Texas F11200009, as entered in NPPES) with the Texas board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ernesto Marrero
- Credential
- MSN, FNP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- F11200009 TX
Self-reported in NPPES; status is on the state search - Practice location
- 2631 Gattis School RD Ste 150, Round Rock, TX 78664
- Phone
- (512) 243-5872
- Enumerated
- Nov 11, 2020
- Record last updated
- Sep 29, 2023
- Fax
- (512) 243-7130
- Medicare enrollment
- Enrolled (PECOS I20250128001210); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 4,825 in Texas → Look up another NPI →
Verify Ernesto Marrero in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Texas board licenses this profession
Search for license F11200009Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% fewer Medicare Part D claims than the average nurse practitioner in 2024
690 Medicare Part D claims for 154 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Gabapentin50 claims
- Atorvastatin Calcium30 claims
- Albuterol Sulfate Hfa26 claims
- Amlodipine Besylate22 claims
- Metformin Hcl20 claims
- Cyclobenzaprine Hcl19 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Doral Medical And Multi Specialty Facility LLCBrooklyn, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ernesto Marrero among 4,825 nurse practitioner records in Texas
Ernesto Marrero, MSN, FNP is one of 4,825 nurse practitioner records with a practice address in Texas. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 62% of them.
- NPI issued2020 · 62% of these records are older, 31% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 54% of these records are
- Graduated2020 · median 2018 among the 2,618 with a school on file
- Record last updated2023 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nurse Practitioner providers in Texas
There are 4,825 nurse practitioner records in Texas.
All 4,825 in Texas → Every provider in Round Rock → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Mary Jo AllenRound Rock, TX 786641679369169
- Courtney Bearden, P/MHNPRound Rock, TX 786641992015572
- Roxanne BlackwellRound Rock, TX 786641972282440
- Annie Bomer, APRNRound Rock, TX 786641497330617
- Mary DinhRound Rock, TX 786641720884661
- Stephanie Knight, AGACNP-BCRound Rock, TX 786641518337666
- Sarah Lear, CNPRound Rock, TX 786641902516537
- Rita Sears, FNP-CRound Rock, TX 786641902441421
Common questions
What is Ernesto Marrero, MSN, FNP's NPI number?
Ernesto Marrero, MSN, FNP's National Provider Identifier (NPI) is 1104428416, issued on Nov 11, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Ernesto Marrero, MSN, FNP located?
The NPPES record lists a practice address at 2631 Gattis School RD Ste 150, Round Rock, TX, 78664. Phone: (512) 243-5872. Providers update this record themselves, so call before visiting.
How can I verify Ernesto Marrero, MSN, FNP's license?
NPPES lists Texas license number F11200009, as entered by the provider. Search the Texas board that licenses this profession; the NPPES record confirms identity only.
How much does Ernesto Marrero, MSN, FNP prescribe under Medicare Part D?
In 2024, Ernesto Marrero, MSN, FNP had 690 Medicare Part D claims for 154 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.