Mayumi Pierce, M.D.
NPI 1427390814 · Psychiatry Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mayumi Pierce, M.D. is a Psychiatry Physician provider in San Francisco, CA (NPI 1427390814).
Provider details
- NPI number
- 1427390814
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 132445 (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
13 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 · 10 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Bupropion Hclbrand: Bupropion Xl | 33 |
| Duloxetine Hcl | 33 |
| Fluoxetine Hcl | 20 |
| Bupropion Hclbrand: Bupropion Hcl Sr | 19 |
| Diazepam | 18 |
| Alprazolam | 14 |
| Gabapentin | 14 |
| Hydroxyzine Hcl | 12 |
| Lamotrigine | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-03-23
- Last updated
- 2014-09-11
Frequently asked questions
- What is Mayumi Pierce's NPI number?
- Mayumi Pierce's National Provider Identifier (NPI) is 1427390814, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mayumi Pierce's specialty?
- Mayumi Pierce is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Mayumi Pierce located?
- Mayumi Pierce's practice location on file with NPPES is 401 Parnassus Box 0984-Rtp, San Francisco, CA 94143-0984.
- What is Mayumi Pierce's phone number?
- The practice phone number listed in the NPPES registry for Mayumi Pierce is (415) 476-7577.
- Does Mayumi Pierce accept Medicare?
- Mayumi Pierce is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mayumi Pierce's NPI active?
- Yes — Mayumi Pierce's NPI (1427390814) is active in the NPPES registry as of the last update on 2014-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.