Gemma B. Sto Nino, FNP
Family Nurse Practitioner · Tamuning, GU
Gemma B. Sto Nino, FNP is a family nurse practitioner with a practice address in Tamuning, Guam, and NPI 1992204580, issued on Feb 8, 2018. Check the license (Guam 20R64, as entered in NPPES) with the Guam board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gemma B. Sto Nino
- Credential
- FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License numbers
- 20R64 GU
20NP02 GU
AP135674 TX
Self-reported in NPPES; status is on the state search - Practice location
- 388 Ypao RD, Tamuning, GU 96913
- Phone
- (671) 646-8881
- Enumerated
- Feb 8, 2018
- Record last updated
- Dec 3, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (671) 648-2548
- Medicare enrollment
- Enrolled (PECOS I20200717002740); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 33 in Guam → Look up another NPI →
Also registered at 388 Ypao RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Arnie Lou Baker, NPFamily Nurse Practitioner1487132973
- Alison Chong, FNPFamily Nurse Practitioner1073111712
- Dae-Eil ChongPhysical Therapist1831474410
- Phyllis Collins, C.N.P.Nurse Practitioner1780629378
- Angeline David, DRPH, MHS, RDRegistered Dietitian1538586581
- Daniel Debardeleben, MDFamily Medicine Physician1598253379
Verify Gemma B. Sto Nino in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Guam board licenses this profession
Search for license 20R64Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average family nurse practitioner in 2024
173 Medicare Part D claims for 30 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate25 claims
- Metformin Hcl20 claims
- Glipizide12 claims
- Metformin Hcl Er12 claims
- Pioglitazone Hcl12 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
- General Conference Corp OF SdaTamuning, GU
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gemma B. Sto Nino among 33 family nurse practitioner records in Guam
Gemma B. Sto Nino, FNP is one of 33 family nurse practitioner records with a practice address in Guam. 52% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 36% of them.
- NPI issued2018 · 36% of these records are older, 39% newer
- In a Medicare fileYes · 52% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated2017 · median 2017 among the 15 with a school on file
- Record last updated2020 · 55% 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 Guam practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 family nurse practitioner records list a practice address in Tamuning
They are 13 of the 411 NPPES records with a practice address in Tamuning, and 33 family nurse practitioner records in Guam.
All 33 in Guam → Every provider in Tamuning → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Ashley ArteroTamuning, GU 969131427598366
- Arnie Lou Baker, NPTamuning, GU 969131487132973
- Alison Chong, FNPTamuning, GU 969131073111712
- Rhodora Cruz, APRN, FNP-CTamuning, GU 969131770051153
- Brian Greening, APRN, FNP-BCTamuning, GU 969131922523463
- Diane Hiatt, FNPTamuning, GU 969131013068485
- Lucy Marie Iona, FNPTamuning, GU 969131427499763
- Antoinette Kleiner, FNPMangilao, GU 969131588236624
Common questions
What is Gemma B. Sto Nino, FNP's NPI number?
Gemma B. Sto Nino, FNP's National Provider Identifier (NPI) is 1992204580, issued on Feb 8, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Gemma B. Sto Nino, FNP located?
The NPPES record lists a practice address at 388 Ypao RD, Tamuning, GU, 96913. Phone: (671) 646-8881. Providers update this record themselves, so call before visiting.
How can I verify Gemma B. Sto Nino, FNP's license?
NPPES lists Guam license number 20R64, as entered by the provider. Search the Guam board that licenses this profession; the NPPES record confirms identity only.
How much does Gemma B. Sto Nino, FNP prescribe under Medicare Part D?
In 2024, Gemma B. Sto Nino, FNP had 173 Medicare Part D claims for 30 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.
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.