Gwendolyn Preston, FNP
Psychiatric/Mental Health Nurse Practitioner · Los Angeles, CA
Gwendolyn Preston, FNP is a psychiatric/mental health nurse practitioner with a practice address in Los Angeles, California, and NPI 1053752485, issued on Jul 15, 2013. Check the license (California 21719, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gwendolyn Preston
- Credential
- FNP
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License number
- 21719 CA
Self-reported in NPPES; status is on the state search - Practice location
- 679 S New Hampshire Ave, Los Angeles, CA 90005
- Phone
- (213) 639-0251
- Enumerated
- Jul 15, 2013
- Record last updated
- Oct 23, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20171211001514); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 4,226 in California → Look up another NPI →
Also registered at 679 S New Hampshire Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aishah M A M AlbaderRehabilitation Practitioner1437814811
- Teresa Arciniega, MFTIMarriage & Family Therapist1669865341
- Alondra ArellanoSocial Worker1316595572
- Mabel ArguetaMental Health Counselor1376942284
- Isabella BalleriniCase Manager/Care Coordinator1891320909
- Rhea Bayan, LPTLicensed Psychiatric Technician1710543012
Verify Gwendolyn Preston in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 21719Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average psychiatric/mental health nurse practitioner in 2024
2,363 Medicare Part D claims for 106 beneficiaries, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Quetiapine Fumarate179 claims
- Trazodone Hcl169 claims
- Aripiprazole165 claims
- Gabapentin137 claims
- Sertraline Hcl116 claims
- Hydroxyzine Hcl110 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.
Industry payments in 2024: $27.71
1 payment: food and beverage; the largest payer was Alkermes, Inc. The 23,362 providers of this specialty with any payment received $1,027.77 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Pacific ClinicsLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gwendolyn Preston among 4,226 psychiatric/mental health nurse practitioner records in California
Gwendolyn Preston, FNP is one of 4,226 psychiatric/mental health nurse practitioner records with a practice address in California. 62% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 15% of them.
- NPI issued2013 · 15% of these records are older, 82% newer
- In a Medicare fileYes · 62% of these records are
- In the CMS Doctors and Clinicians fileYes · 46% of these records are
- Graduated2011 · median 2021 among the 1,965 with a school on file
- Record last updated2019 · 16% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0808X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatric/Mental Health Nurse Practitioner providers in California
There are 4,226 psychiatric/mental health nurse practitioner records in California.
All 4,226 in California → Every provider in Los Angeles → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Caroline Ndifon, RNLos Angeles, CA 900051013618115
- Maria Turner, RNLos Angeles, CA 900051518205582
- Shara Amzallag, PMHNP-BCLos Angeles, CA 900041639987084
- Hovhannes Avagyan, PMHNPLos Angeles, CA 900061083496988
- Keumhee Byeon, NPLos Angeles, CA 900061194325431
- Teodoro Carachure Charco, NPLos Angeles, CA 900061568220788
- Cristina Espinosa, PMHNP-BCLos Angeles, CA 900041720717788
- Anthony Fernandez, PMHNP, MSN, RNLos Angeles, CA 900061093441875
Common questions
What is Gwendolyn Preston, FNP's NPI number?
Gwendolyn Preston, FNP's National Provider Identifier (NPI) is 1053752485, issued on Jul 15, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Gwendolyn Preston, FNP located?
The NPPES record lists a practice address at 679 S New Hampshire Ave, Los Angeles, CA, 90005. Phone: (213) 639-0251. Providers update this record themselves, so call before visiting.
How can I verify Gwendolyn Preston, FNP's license?
NPPES lists California license number 21719, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Gwendolyn Preston, FNP prescribe under Medicare Part D?
In 2024, Gwendolyn Preston, FNP had 2,363 Medicare Part D claims for 106 beneficiaries; the average among psychiatric/mental health nurse practitioner prescribers was 906. 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.