Robert Alessi, M.D.
NPI 1770685901 · Psychiatry Physician · San Marcos, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Alessi, M.D. is a Psychiatry Physician provider in San Marcos, CA (NPI 1770685901).
Provider details
- NPI number
- 1770685901
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G89408 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sertraline Hcl | 51 | 29 |
| Gabapentin | 33 | 17 |
| Aripiprazole | 24 | 12 |
| Bupropion Hclbrand: Bupropion Xl | 24 | 11 |
| Lorazepam | 24 | — |
| Alprazolam | 23 | — |
| Escitalopram Oxalate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-01
- Last updated
- 2021-05-06
- Certified
- 2021-05-06
Frequently asked questions
- What is Robert Alessi's NPI number?
- Robert Alessi's National Provider Identifier (NPI) is 1770685901, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Alessi's specialty?
- Robert Alessi is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Alessi located?
- Robert Alessi's practice location on file with NPPES is 277 Rancheros Dr Ste 301, San Marcos, CA 92069-2993.
- What is Robert Alessi's phone number?
- The practice phone number listed in the NPPES registry for Robert Alessi is (760) 471-4073.
- Does Robert Alessi accept Medicare?
- Robert Alessi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Alessi's NPI active?
- Yes — Robert Alessi's NPI (1770685901) is active in the NPPES registry as of the last update on 2021-05-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.