NPPES file of Aug 9, 2026

Marianne Guintu Usi, NP

Gerontology Nurse Practitioner · San Bernardino, CA

Marianne Guintu Usi, NP is a gerontology nurse practitioner with a practice address in San Bernardino, California, and NPI 1104507466, issued on Jul 28, 2023. Check the license (California NP95011934, as entered in NPPES) with the California 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
1104507466
Name
Marianne Guintu Usi
Credential
NP
Primary taxonomy
Gerontology Nurse Practitioner 363LG0600X
License number
NP95011934 CA
Self-reported in NPPES; status is on the state search
Practice location
401 E Highland Ave Ste 551, San Bernardino, CA 92404
Phone
(909) 882-9150
Enumerated
Jul 28, 2023
Record last updated
Mar 12, 2026
Fax
(909) 883-8972
Medicare enrollment
Enrolled (PECOS I20230828003263); accepts Medicare assignment
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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Also registered at 401 E Highland Ave Ste 551

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

  1. Sreesh Iyengar, MDNephrology Physician1699069146
  2. Paul Kil, FNP-CNurse Practitioner1982476479
  3. Parag Mehtani, M.D.Nephrology Physician1770773160
  4. Ashok Nath, M.D.,Nephrology Physician1992951115
  5. Sapna Singh, MDNephrology Physician1417585605

Verify Marianne Guintu Usi in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license NP95011934    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 California license search

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94% fewer Medicare Part D claims than the average gerontology nurse practitioner in 2024

83 Medicare Part D claims for 17 beneficiaries, against an average of 1,369 among the 6,165 providers of this specialty who prescribed in Part D.

  1. Marianne Usi83
  2. Specialty average1,369

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. Nephrology Associates Medical Group IncSan Bernardino, CA

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

Gerontology Nurse Practitioner providers in California

There are 569 gerontology nurse practitioner records in California.

All 569 in California → Every provider in San Bernardino →

Other gerontology nurse practitioner records in California

  1. Chelsea Abad, CRNP, AGPCNP - BCDuarte, CA1952848137
  2. Abigail Abar-Calica, N.P.Menlo Park, CA1639330269
  3. Maribeth Abedi, NURSE PRACTITIONERModesto, CA1992330625
  4. Michelle Abrams, NPThousand Oaks, CA1780154187
  5. Roman Emmanuel AcebedoCarson, CA1649102609
  6. Paritosh Acharya, NPSacramento, CA1992511943
  7. Lisa Adamek, NPRoseville, CA1134103625
  8. Piunik AghajaniBeverly Hills, CA1467382366
  9. Alice Ahn, NPDuarte, CA1790151405
  10. Angelica Ahonen, DNP, APRNSanta Ana, CA1427974450

Common questions

What is Marianne Guintu Usi, NP's NPI number?

Marianne Guintu Usi, NP's National Provider Identifier (NPI) is 1104507466, issued on Jul 28, 2023. An NPI identifies a provider in billing; it is not a license.

Where is Marianne Guintu Usi, NP located?

The NPPES record lists a practice address at 401 E Highland Ave Ste 551, San Bernardino, CA, 92404. Phone: (909) 882-9150. Providers update this record themselves, so call before visiting.

How can I verify Marianne Guintu Usi, NP's license?

NPPES lists California license number NP95011934, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Marianne Guintu Usi, NP prescribe under Medicare Part D?

In 2024, Marianne Guintu Usi, NP had 83 Medicare Part D claims for 17 beneficiaries; the average among gerontology nurse practitioner prescribers was 1,369. 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.