Martha Singer, M.D.
NPI 1275501330 · Orthopaedic Surgery Physician · Castro Valley, CA
Martha Singer, M.D. is a Orthopaedic Surgery Physician provider in Castro Valley, CA (NPI 1275501330).
Provider details
- NPI number
- 1275501330
- Entity type
- Individual
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- G77127 (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
20 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-14
- Last updated
- 2011-12-09
Frequently asked questions
- What is Martha Singer's NPI number?
- Martha Singer's National Provider Identifier (NPI) is 1275501330, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Martha Singer's specialty?
- Martha Singer is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Martha Singer located?
- Martha Singer's practice location on file with NPPES is 21030 Redwood Rd, Castro Valley, CA 94546-5920.
- What is Martha Singer's phone number?
- The practice phone number listed in the NPPES registry for Martha Singer is (510) 538-0430.
- Is Martha Singer's NPI active?
- Yes — Martha Singer's NPI (1275501330) is active in the NPPES registry as of the last update on 2011-12-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.