SARENA NICOLE LESEM CNM
NPI 1467943001
Advanced Practice Midwife in Greenbrae, CA
About Sarena Nicole Lesem Cnm NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SARENA NICOLE LESEM CNM (NPI 1467943001) is an individual advanced practice midwife in Greenbrae, California, licensed in California (NM236659) and active in the NPI registry since May 2018. She is enrolled in Medicare PECOS, is affiliated with Mount Auburn Hospital, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Locations 3
Other Identifiers 1
Accepted Insurance
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
Sarena Nicole Lesem Cnm 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 Reassignment
Medicare enrollment records show Sarena Lesem reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Cambridge, MA 02138
- Reassigned Medicare billing, Massachusetts enrollment
- 423 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mount Auburn Hospital
Acute Care Hospitals · Cambridge, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94904 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.
GREENBRAE, CA 94904
GREENBRAE, CA 94904
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 Sarena Lesem's NPI number?
The NPI number for Sarena Lesem is 1467943001. It was assigned to this individual provider in the NPPES registry on May 18, 2018. The provider is also known as Sari Lesem.
Where is Sarena Lesem located?
Sarena Lesem practices at 250 Bon Air Rd, Greenbrae, CA 94904. The listed phone number is (415) 925-7591.
What is Sarena Lesem's specialty?
The primary specialty registered for this NPI is Advanced Practice Midwife with taxonomy code 367A00000X.
Is Sarena Lesem enrolled in Medicare?
Yes. Sarena Lesem 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 organization bills Medicare for Sarena Lesem's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sarena Lesem reassigns Medicare benefits to Mount Auburn Professional Services Inc (Cambridge, MA). The 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 Sarena Lesem's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Sarena Lesem accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Sarena Lesem as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Sarena Lesem affiliated with any hospitals?
According to CMS data, Sarena Lesem is affiliated with Mount Auburn Hospital.
When was this NPI record last updated?
The NPPES record for Sarena Lesem was last updated on September 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 58 days 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.
# Sarena Nicole Lesem, CNM · NPI 1467943001
Advanced Practice Midwife physician in Greenbrae, California. Individual provider, active in the CMS NPPES registry since May 18, 2018.
## Identity
- **NPI:** 1467943001 (Entity type: Individual)
- **Enumerated:** May 18, 2018
- **Primary specialty:** Advanced Practice Midwife · taxonomy 367A00000X
- **State license:** NM236659 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 250 BON AIR RD, Greenbrae, CA 94904-1702
- **Phone:** (415) 925-7591
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Mount Auburn Professional Services Inc (NPI 1992750996, Cambridge, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2023
## Record status
- **NPPES last updated:** September 11, 2026
- **Other identifiers:** Medicaid 110218118A (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1467943001) · Data from the CMS NPPES public registry.