Sandra Seier, M.D.
NPI 1831260017 · Family Medicine Physician · Martinez, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sandra Seier, M.D. is a Family Medicine Physician provider in Martinez, CA (NPI 1831260017).
Provider details
- NPI number
- 1831260017
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- C51739 (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 · 121 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 453 | 177 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 325 | 90 |
| Levothyroxine Sodium | 301 | 106 |
| Lisinopril | 286 | 109 |
| Losartan Potassium | 253 | 96 |
| Amlodipine Besylate | 238 | 100 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-10
- Last updated
- 2022-01-20
- Certified
- 2022-01-20
Frequently asked questions
- What is Sandra Seier's NPI number?
- Sandra Seier's National Provider Identifier (NPI) is 1831260017, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sandra Seier's specialty?
- Sandra Seier is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sandra Seier located?
- Sandra Seier's practice location on file with NPPES is 200 Muir Rd, Martinez, CA 94553-4614.
- What is Sandra Seier's phone number?
- The practice phone number listed in the NPPES registry for Sandra Seier is (925) 372-1000.
- Does Sandra Seier accept Medicare?
- Sandra Seier is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sandra Seier's NPI active?
- Yes — Sandra Seier's NPI (1831260017) is active in the NPPES registry as of the last update on 2022-01-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.