IndividualActive
Maria Klein
NPI 1427907948 · Registered Nurse · San Francisco, CA
Maria Klein is a Registered Nurse provider in San Francisco, CA (NPI 1427907948).
Provider details
- NPI number
- 1427907948
- Entity type
- Individual
- Primary specialty
- Registered NurseNursing Service Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 95212018 (CA)
Specialties & taxonomies
Nursing Service Providers
Profile Score
Established profile(53/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in 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
490 Illinois St.
San Francisco, CA 94158
Phone: (415) 476-1435
Street-level locationGet directions
Mailing address
490 Illinois St.
San Francisco, CA 94158
Registry dates
- Enumerated
- 2026-01-27
- Last updated
- 2026-01-27
- Certified
- 2026-01-22
Frequently asked questions
- What is Maria Klein's NPI number?
- Maria Klein's National Provider Identifier (NPI) is 1427907948, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Klein's specialty?
- Maria Klein is listed in the NPPES registry with a primary specialty of Registered Nurse (Nursing Service Providers).
- Where is Maria Klein located?
- Maria Klein's practice location on file with NPPES is 490 Illinois St., San Francisco, CA 94158.
- What is Maria Klein's phone number?
- The practice phone number listed in the NPPES registry for Maria Klein is (415) 476-1435.
- Is Maria Klein's NPI active?
- Yes — Maria Klein's NPI (1427907948) is active in the NPPES registry as of the last update on 2026-01-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.