Louis Simpson, M.D.
NPI 1710012695 · Psychiatry Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Louis Simpson, M.D. is a Psychiatry Physician provider in Los Angeles, CA (NPI 1710012695).
Provider details
- NPI number
- 1710012695
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A25794 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Zolpidem Tartrate | 80 |
| Benztropine Mesylate | 63 |
| Olanzapine | 52 |
| Diazepam | 33 |
| Divalproex Sodium | 32 |
| Paroxetine Hcl | 27 |
| Citalopram Hydrobromidebrand: Citalopram Hbr | 26 |
| Risperidone | 25 |
| Haloperidol | 21 |
| Lorazepam |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-22
- Last updated
- 2023-03-07
Frequently asked questions
- What is Louis Simpson's NPI number?
- Louis Simpson's National Provider Identifier (NPI) is 1710012695, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Louis Simpson's specialty?
- Louis Simpson is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Louis Simpson located?
- Louis Simpson's practice location on file with NPPES is 3756 Santa Rosalia Dr, Los Angeles, CA 90008-3606.
- What is Louis Simpson's phone number?
- The practice phone number listed in the NPPES registry for Louis Simpson is (323) 299-1262.
- Does Louis Simpson accept Medicare?
- Louis Simpson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Louis Simpson's NPI active?
- Yes — Louis Simpson's NPI (1710012695) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.