Heather Williams, PMHNP
Psychiatric/Mental Health Nurse Practitioner · Walnut, CA
Heather Williams, PMHNP is a psychiatric/mental health nurse practitioner with a practice address in Walnut, California, and NPI 1356937189, issued on Dec 16, 2020. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Heather Williams
- Credential
- PMHNP
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License numbers
- 2020042237 MO
APRN11014460 FL
2014039593 MO
Self-reported in NPPES; status is on the state search - Practice location
- 340 S Lemon Ave # 9892, Walnut, CA 91789
- Phone
- (415) 403-2156
- Enumerated
- Dec 16, 2020
- Record last updated
- Oct 26, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20231127002217); 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 340 S Lemon Ave # 9892
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bryan MestmanProfessional Counselor1952006520
- Michael Joseph Nevarez, DNP, RN, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1184965709
- Leah ShrockClinical Social Worker1689168247
- Kelli Soto, APRN PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1942891353
- Misgana TeklaiPsychiatric/Mental Health Nurse Practitioner1770254393
Verify Heather Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024
24 Medicare Part D claims, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D.
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
- Brightside Health IncSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Heather Williams among 4,226 psychiatric/mental health nurse practitioner records in California
Heather Williams, PMHNP 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 2020, is newer than 41% of them.
- NPI issued2020 · 41% of these records are older, 54% newer
- In a Medicare fileYes · 62% of these records are
- In the CMS Doctors and Clinicians fileYes · 46% of these records are
- Graduated2020 · median 2021 among the 1,965 with a school on file
- Record last updated2021 · 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).
9 psychiatric/mental health nurse practitioner records list a practice address in Walnut
They are 9 of the 317 NPPES records with a practice address in Walnut, and 4,226 psychiatric/mental health nurse practitioner records in California.
All 4,226 in California → Every provider in Walnut → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Kelley Bitter, NPWalnut, CA 917891588812812
- Amy DuWalnut, CA 917891750115457
- Christine GoWalnut, CA 917891174279921
- Piran Mehta, PMHNP-BCWalnut, CA 917891518626662
- Michael Joseph Nevarez, DNP, RN, PMHNP-BCWalnut, CA 917891184965709
- Kelli Soto, APRN PMHNP-BCWalnut, CA 917891942891353
- Misgana TeklaiWalnut, CA 917891770254393
- Clibern Villaflor, MSN, PMHNP-BCWalnut, CA 917891831029206
Common questions
What is Heather Williams, PMHNP's NPI number?
Heather Williams, PMHNP's National Provider Identifier (NPI) is 1356937189, issued on Dec 16, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Heather Williams, PMHNP located?
The NPPES record lists a practice address at 340 S Lemon Ave # 9892, Walnut, CA, 91789. Phone: (415) 403-2156. Providers update this record themselves, so call before visiting.
How can I verify Heather Williams, PMHNP's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Heather Williams, PMHNP prescribe under Medicare Part D?
In 2024, Heather Williams, PMHNP had 24 Medicare Part D claims; 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.