Heather Williams, PMHNP
NPI 1356937189 · Psychiatric/Mental Health Nurse Practitioner · Walnut, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Heather Williams, PMHNP is a Psychiatric/Mental Health Nurse Practitioner provider in Walnut, CA (NPI 1356937189).
Provider details
- NPI number
- 1356937189
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PMHNP
- Sex
- Female
- Sole proprietor
- No
- License
- 2014039593 (MO)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-12-16
- Last updated
- 2021-10-26
- Certified
- 2021-10-05
Frequently asked questions
- What is Heather Williams's NPI number?
- Heather Williams's National Provider Identifier (NPI) is 1356937189, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Heather Williams's specialty?
- Heather Williams is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Heather Williams located?
- Heather Williams's practice location on file with NPPES is 340 S Lemon Ave # 9892, Walnut, CA 91789-2706.
- What is Heather Williams's phone number?
- The practice phone number listed in the NPPES registry for Heather Williams is (415) 403-2156.
- Does Heather Williams accept Medicare?
- Heather Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Heather Williams's NPI active?
- Yes — Heather Williams's NPI (1356937189) is active in the NPPES registry as of the last update on 2021-10-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.