MARA BAILEY-OLSON NP
NPI 1104100692
Nurse Practitioner in San Francisco, CA
About Mara Bailey-olson Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARA BAILEY-OLSON NP (NPI 1104100692) is an individual nurse practitioner in San Francisco, California, licensed in California (19161) and active in the NPI registry since October 2011. She is enrolled in Medicare PECOS and is a graduate of Other (2009).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mara Bailey-olson Np is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Mara Bailey-olson reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 1,159 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94143 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Mara Bailey-olson's NPI number?
The NPI number for Mara Bailey-olson is 1104100692. It was assigned to this individual provider in the NPPES registry on October 3, 2011.
Where is Mara Bailey-olson located?
Mara Bailey-olson practices at 550 16th St 4th Floor, Mailstop 0434, San Francisco, CA 94143. The listed phone number is (415) 476-2188.
What is Mara Bailey-olson's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Mara Bailey-olson enrolled in Medicare?
Yes. Mara Bailey-olson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Mara Bailey-olson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mara Bailey-olson reassigns Medicare benefits to 3 organizations: Ucsf Pediatrics Associates (San Francisco, CA), University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (San Francisco, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mara Bailey-olson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Mara Bailey-olson was last updated on March 23, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mara Bailey-Olson, NP · NPI 1104100692
Nurse Practitioner physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since October 3, 2011.
## Identity
- **NPI:** 1104100692 (Entity type: Individual)
- **Enumerated:** October 3, 2011
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 19161 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 550 16TH ST, 4TH FLOOR, MAILSTOP 0434, San Francisco, CA 94143
- **Phone:** (415) 476-2188
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Ucsf Pediatrics Associates (NPI 1376614016, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2009
## Record status
- **NPPES last updated:** March 23, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1104100692) · Data from the CMS NPPES public registry.