Mary Ann Williamson, R.N. F.N.P.
NPI 1255756276 · Family Nurse Practitioner · Ojai, CA
Mary Ann Williamson, R.N. F.N.P. is a Family Nurse Practitioner provider in Ojai, CA (NPI 1255756276).
Provider details
- NPI number
- 1255756276
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- R.N. F.N.P.
- Sex
- Female
- Sole proprietor
- No
- License
- 3148 (CA)
Specialties & taxonomies
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
12 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
- 2014-02-27
- Last updated
- 2014-02-27
Frequently asked questions
- What is Mary Ann Williamson's NPI number?
- Mary Ann Williamson's National Provider Identifier (NPI) is 1255756276, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Ann Williamson's specialty?
- Mary Ann Williamson is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Ann Williamson located?
- Mary Ann Williamson's practice location on file with NPPES is 207 Church Rd, Ojai, CA 93023-3119.
- What is Mary Ann Williamson's phone number?
- The practice phone number listed in the NPPES registry for Mary Ann Williamson is (805) 646-4386.
- Is Mary Ann Williamson's NPI active?
- Yes — Mary Ann Williamson's NPI (1255756276) is active in the NPPES registry as of the last update on 2014-02-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.