Mark Choa, M.D.
NPI 1992966618 · Psychiatry Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Choa, M.D. is a Psychiatry Physician provider in Palo Alto, CA (NPI 1992966618).
Provider details
- NPI number
- 1992966618
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A110178 (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
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 · 7 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Clozapinebrand: Clozapine Odt | 22 |
| Lurasidone Hcl | 22 |
| Paroxetine Hcl | 18 |
| Clozapine | 15 |
| Clonazepam | 14 |
| Bupropion Hclbrand: Bupropion Xl | 12 |
| Trazodone Hcl | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 7273 14th Ave Ste 120bSacramento, CA 95820-3500Phone: (916) 502-5668
Registry dates
- Enumerated
- 2008-06-25
- Last updated
- 2024-04-29
- Certified
- 2024-04-29
Frequently asked questions
- What is Mark Choa's NPI number?
- Mark Choa's National Provider Identifier (NPI) is 1992966618, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Choa's specialty?
- Mark Choa is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Choa located?
- Mark Choa's practice location on file with NPPES is 300 Pasteur Dr, Palo Alto, CA 94304-2203.
- What is Mark Choa's phone number?
- The practice phone number listed in the NPPES registry for Mark Choa is (650) 723-4000.
- Does Mark Choa accept Medicare?
- Mark Choa is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Choa's NPI active?
- Yes — Mark Choa's NPI (1992966618) is active in the NPPES registry as of the last update on 2024-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.