NPPES file of Aug 9, 2026

Ralph Eugene Grinnell, APRN, FNP-BC

Family Nurse Practitioner · San Antonio, TX

Ralph Eugene Grinnell, APRN, FNP-BC is a family nurse practitioner with a practice address in San Antonio, Texas, and NPI 1457666109, issued on Aug 18, 2010. Check the license (Texas 588252, as entered in NPPES) with the Texas board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1457666109
Name
Ralph Eugene Grinnell
Credential
APRN, FNP-BC
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License number
588252 TX
Self-reported in NPPES; status is on the state search
Practice location
5107 Medical Dr, San Antonio, TX 78229
Phone
(210) 614-8612
Enumerated
Aug 18, 2010
Record last updated
Oct 13, 2015 (not updated in 11 years: call before relying on the address or phone)
Fax
(210) 615-1666
Medicare enrollment
Enrolled (PECOS I20110126001139); accepts Medicare assignment
Medical or professional school
University Of Texas Medical School At San Antonio, 2010
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest family nurse practitioner records → All 21,242 in Texas → Look up another NPI →

Also registered at 5107 Medical Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Maricruz Arzeta-Francisco, FNP-CFamily Nurse Practitioner1184124604
  2. Robin Butcher, APRNFamily Nurse Practitioner1982330288
  3. Stephen Cavazos, DNP, RN, FNP-BCNurse Practitioner1609364447
  4. Priscilla Ching, APRN-CNPFamily Nurse Practitioner1487315263
  5. Kalicia ChristieFamily Nurse Practitioner1033775572
  6. Tina Copple, APRNFamily Nurse Practitioner1568676500

Verify Ralph Eugene Grinnell in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Texas board licenses this profession
    Search for license 588252    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Texas license search

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86% fewer Medicare Part D claims than the average family nurse practitioner in 2024

178 Medicare Part D claims for 93 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.

  1. Ralph Grinnell178
  2. Specialty average1,305

Most prescribed

  1. Levocetirizine Dihydrochloride28 claims
  2. Montelukast Sodium18 claims
  3. Paxlovid12 claims
  4. Fluticasone Propionate11 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

  1. Tmc Provider Group PLLCSan Antonio, TX

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Ralph Eugene Grinnell among 21,242 family nurse practitioner records in Texas

Ralph Eugene Grinnell, APRN, FNP-BC is one of 21,242 family nurse practitioner records with a practice address in Texas. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 12% of them.

  • NPI issued2010 · 12% of these records are older, 86% newer
  • In a Medicare fileYes · 75% of these records are
  • In the CMS Doctors and Clinicians fileYes · 53% of these records are
  • Graduated2010 · median 2018 among the 11,286 with a school on file
  • Record last updated2015 · 38% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

1,362 family nurse practitioner records list a practice address in San Antonio

They are 1,362 of the 37,749 NPPES records with a practice address in San Antonio, and 21,242 family nurse practitioner records in Texas.

All 21,242 in Texas → Every provider in San Antonio → Family Nurse Practitioner nationwide →

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Lancia Beavers, FNPSan Antonio, TX 782291376573071
  2. Sally Brabant, FNP, RNSan Antonio, TX 782291588776116
  3. Joyce Burns, FNPSan Antonio, TX 782291104840511
  4. Patience Cain, FNPSan Antonio, TX 782291659488633
  5. Betty Corona, FNPSan Antonio, TX 782291063529048
  6. Michele Deaver, NPSan Antonio, TX 782291295847275
  7. Linda Fortmeier-Saucier, FNPSan Antonio, TX 782291811912223
  8. Modesta Garcia-Atwater, FNPSan Antonio, TX 782291801905427

Common questions

What is Ralph Eugene Grinnell, APRN, FNP-BC's NPI number?

Ralph Eugene Grinnell, APRN, FNP-BC's National Provider Identifier (NPI) is 1457666109, issued on Aug 18, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Ralph Eugene Grinnell, APRN, FNP-BC located?

The NPPES record lists a practice address at 5107 Medical Dr, San Antonio, TX, 78229. Phone: (210) 614-8612. Providers update this record themselves, so call before visiting.

How can I verify Ralph Eugene Grinnell, APRN, FNP-BC's license?

NPPES lists Texas license number 588252, as entered by the provider. Search the Texas board that licenses this profession; the NPPES record confirms identity only.

How much does Ralph Eugene Grinnell, APRN, FNP-BC prescribe under Medicare Part D?

In 2024, Ralph Eugene Grinnell, APRN, FNP-BC had 178 Medicare Part D claims for 93 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.