Karen Mueller, NP
NPI 1124321260 · Nurse Practitioner · Stanford, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Mueller, NP is a Nurse Practitioner provider in Stanford, CA (NPI 1124321260).
Provider details
- NPI number
- 1124321260
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 20081 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Other Service Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 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
- 2010-12-13
- Last updated
- 2023-04-07
- Certified
- 2023-04-07
Frequently asked questions
- What is Karen Mueller's NPI number?
- Karen Mueller's National Provider Identifier (NPI) is 1124321260, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Mueller's specialty?
- Karen Mueller is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Mueller located?
- Karen Mueller's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Karen Mueller's phone number?
- The practice phone number listed in the NPPES registry for Karen Mueller is (650) 723-4000.
- Does Karen Mueller accept Medicare?
- Karen Mueller is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Mueller's NPI active?
- Yes — Karen Mueller's NPI (1124321260) is active in the NPPES registry as of the last update on 2023-04-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.