Mackenzie Obrien, NP
NPI 1861123937 · Critical Care Pediatric Nurse Practitioner · Palo Alto, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mackenzie Obrien, NP is a Critical Care Pediatric Nurse Practitioner provider in Palo Alto, CA (NPI 1861123937).
Provider details
- NPI number
- 1861123937
- Entity type
- Individual
- Primary specialty
- Critical Care Pediatric Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 95020956 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing 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
4 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
- 2022-06-21
- Last updated
- 2023-09-06
- Certified
- 2023-09-06
Frequently asked questions
- What is Mackenzie Obrien's NPI number?
- Mackenzie Obrien's National Provider Identifier (NPI) is 1861123937, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mackenzie Obrien's specialty?
- Mackenzie Obrien is listed in the NPPES registry with a primary specialty of Critical Care Pediatric Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mackenzie Obrien located?
- Mackenzie Obrien's practice location on file with NPPES is 725 Welch Rd, Palo Alto, CA 94304-1614.
- What is Mackenzie Obrien's phone number?
- The practice phone number listed in the NPPES registry for Mackenzie Obrien is (650) 497-8000.
- Does Mackenzie Obrien accept Medicare?
- Mackenzie Obrien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mackenzie Obrien's NPI active?
- Yes — Mackenzie Obrien's NPI (1861123937) is active in the NPPES registry as of the last update on 2023-09-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.