MARA SPARE MD
NPI 1598993891
Hospitalist in Mountain View, CA
About Mara Spare Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARA SPARE MD (NPI 1598993891) is an individual hospitalist provider in Mountain View, California, licensed in California (A113613) and active in the NPI registry since June 2009. She is enrolled in Medicare PECOS and is a graduate of University Of Nevada School Of Medicine (2009).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
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 Spare Md 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
2Medicare enrollment records show Mara Spare reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Palo Alto, CA 94301
- Reassigned Medicare billing, California enrollment
- 4,479 clinicians in this Medicare group
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 1,051 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.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94040 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
MOUNTAIN VIEW, CA 94040
MOUNTAIN VIEW, CA 94040
MOUNTAIN VIEW, CA 94040
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 Spare's NPI number?
The NPI number for Mara Spare is 1598993891. It was assigned to this individual provider in the NPPES registry on June 24, 2009. The provider is also known as Mara Lynn Zulauf MD.
Where is Mara Spare located?
Mara Spare practices at 2500 Grant Rd, Mountain View, CA 94040. The listed phone number is (650) 940-7000.
What is Mara Spare's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Mara Spare enrolled in Medicare?
Yes. Mara Spare 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 Spare's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mara Spare reassigns Medicare benefits to 2 organizations: Sutter Bay Medical Foundation (Palo Alto, CA) and Regents Of The University Of California (San Diego, 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 Spare'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 Spare was last updated on October 18, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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 Spare, MD · NPI 1598993891
Hospitalist physician in Mountain View, California. Individual provider, active in the CMS NPPES registry since June 24, 2009.
## Identity
- **NPI:** 1598993891 (Entity type: Individual)
- **Enumerated:** June 24, 2009
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** A113613 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2500 GRANT RD, Mountain View, CA 94040-4302
- **Phone:** (650) 940-7000
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Sutter Bay Medical Foundation (NPI 1013950807, Palo Alto, CA); Regents Of The University Of California (NPI 1487772380, San Diego, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Nevada School Of Medicine, class of 2009
## Record status
- **NPPES last updated:** October 18, 2024
---
Source: [NPI Profile](https://npiprofile.com/npi/1598993891) · Data from the CMS NPPES public registry.