Heidi Lennartz, LCSW
Heidi Lennartz, LCSW is a provider specialising in Clinical Social Worker in San Fernando, CA, registered under NPI 1003395765. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in San Fernando, based on OpenStreetMap data collected Sep 23, 2026. Parking is available about 0.47 mi away at Lot 2. There is EV charging 0.41 mi from the office (Tesla Destination Charger) — useful if you are driving in from out of town. The nearest transit stop is 692 ft away, served by Brand & O'Melveny.
Getting here and what is nearby
Parking Clinic Parking 234 ft ~1 min
Transit Brand & O'Melveny 521 ft ~2 min
Transit Brand & Mott 609 ft ~3 min
Transit Brand & O'Melveny 692 ft ~3 min
Gas station Arco 0.26 mi ~6 min
11244 Laurel Canyon Boulevard, San Fernando 91340
Restaurant Taco Bell 0.28 mi ~6 min
14511 Chatsworth Drive, San Fernando 91340
Mo-Th 07:00-02:00; Fr-Sa 07:00-03:00; Su 07:00-02:00
Parking Lot 9 0.30 mi ~6 min
EV charging 0.39 mi ~8 min
EV charging Tesla Supercharger 0.40 mi ~8 min
EV charging Tesla Destination Charger 0.41 mi ~9 min
Restaurant Los Camarones 0.43 mi ~9 min
1118 Pico Street, San Fernando 91340
Restaurant No Sabo 0.46 mi ~10 min
Parking Lot 2 0.47 mi ~10 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| LCS16588 | CA | Clinical Social Worker primary |
This provider holds licence LCS16588 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Clinical covers
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances. NUCC Health Care Provider Taxonomy, code 1041C0700X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003395765 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 13, 2018 |
| Last updated | Aug 13, 2018 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | LCSW |
| Practice address |
732 MOTT ST San Fernando, CA 91340 (818) 963-5690 |
| Mailing address |
16115 KNAPP ST North Hills, CA 91343 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 3 | 9 | 5 | 7 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 9 | 1 | 7 | 3 |
Sum = 55 · next multiple of 10 = 60 · check digit = 5 · actual last digit = 5
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.