Sarena Nicole Lesem, CNM
Certified Nurse Midwife (Cnm) (CMS) · Greenbrae, CA
At a glance
250 Bon Air Rd, Greenbrae, CA 94904-1702
NPPES record updated Sep 11, 2026. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
250 Bon Air RdGreenbrae, CA 94904-1702
Additional reported practice locations
495 Western AveBrighton, MA 021351007
Phone: 7816933842
Fax: 6179788222 22 Mill St Ste 204
Arlington, MA 024764738
Phone: 7816461043
Fax: 7816461935 43 Foundry Ave
Waltham, MA 024538313
Phone: 7816933842
Fax: 7816933805
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 2023
- CMS specialties
- Certified Nurse Midwife (Cnm)
Practice groups
Reported hospital affiliations
- Mount Auburn Hospital Cambridge, MA
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Service-mix comparison is unavailable for this NPI in the imported Medicare service file.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Certified Nurse Midwife (Cnm) (CMS)
- Taxonomy code
- 367A00000X
- Enumeration date
- May 18, 2018
- Record updated
- Sep 11, 2026
More registry details
- Provider type
- Individual · Type 1
- Other reported name
- SARI LESEM
- Reported credentials
- CNM
Reported taxonomies and licenses
367A00000X · Primary
License reported: NM236659 CA
367A00000X
License reported: RN10015603 MA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
250 Bon Air RdGreenbrae, CA 94904-1702
- Phone
- (415) 925-7591
Mailing address
330 MOUNT AUBURN STPARSONS 2
CAMBRIDGE, MA 021385597
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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