CASSIE SEWALD
NPI 1851104129
Advanced Practice Midwife in Mountain View, CA

Q: What is Cassie Sewald's NPI number?

The NPI number for Cassie Sewald is 1851104129. It was assigned to this individual provider in the NPPES registry on January 30, 2025.

Q: What is Cassie Sewald's specialty?

The primary specialty registered for this NPI is Advanced Practice Midwife with taxonomy code 367A00000X.

Q: When was this NPI record last updated?

The NPPES record for Cassie Sewald was last updated on February 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months 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.

Active since January 30, 2025PECOS Enrolled

2495 HOSPITAL DR STE 525, MOUNTAIN VIEW, CA 94040(650) 962-5829 Get Directions Write a Review

NPPES record last updated: February 20, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Cassie Sewald NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CASSIE SEWALD (NPI 1851104129) is an individual advanced practice midwife in Mountain View, California, licensed in California (236588) and active in the NPI registry since January 2025. She is enrolled in Medicare PECOS and is a graduate of Other (2025).

NPPES Registry Identity

NPI1851104129

Entity TypeIndividualFemale

Primary Taxonomy367A00000X

Provider Legal NameCASSIE SEWALD

Location Address2495 HOSPITAL DR STE 525Mountain View, CA 94040-4186

Mailing Address2495 Hospital Dr Ste 525Mountain View, CA 94040-4186 · (650) 962-5829

Phone(650) 962-5829

Sole ProprietorYes

Medical School CMSOtherGraduated 2025

Enumeration DateJanuary 30, 2025

Last NPPES UpdateFebruary 20, 2026

NPPES CertifiedFebruary 20, 2026

✔ NPI 1851104129 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyAdvanced Practice MidwifePhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code367A00000X

License✔ Licensed in CA · 236588

Definition

Advanced practice midwifery encompasses the independent provision of care during pregnancy, childbirth, and the postpartum period; sexual and reproductive health; gynecologic health; and family planning services, including preconception care. Midwives also provide primary care for individuals from adolescence throughout the lifespan as well as care for the healthy newborn during the first 28 days of life. Midwives provide initial and ongoing comprehensive assessment, diagnosis, and treatment. Midwifery care includes health promotion, disease prevention, risk assessment and management, and individualized wellness education and counseling. Source: American College of Nurse-Midwives, www.midwife.org Additional Resources: See the American College of Nurse-Midwives, www.midwife.org, for more information on Certified Nurse-Midwives, Certified Midwives, the American Midwifery Certification Board (AMCB), and licensure.

Also ListedRegistered NurseTaxonomy 163W00000X · License 95219861 (CA)

Also ListedNurse Practitioner · Women's HealthTaxonomy 363LW0102X · License 95037799 (CA)

2495 HOSPITAL DR STE 525, Mountain View, CA 94040

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Cassie Sewald is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID42792145

PECOS Enrollment IDI20260306002766

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Cassie Sewald reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Ucsf Health Medical Foundation

35 mi

Pediatrics

6425 CHRISTIE AVE STE 220
Emeryville, CA 94608

Reassigned Medicare billing, California enrollment
79 clinicians in this Medicare group

NPI 1043628316 (415) 476-7220

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 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.

New Patient

$106.47 typical visit price

range $70.37 – $206.04

Typical copayment $26.61 (range $17.59 – $51.51)

Most-billed visit code 99203

Established Patient

$86.56 typical visit price

range $23.96 – $169.60

Typical copayment $21.64 (range $5.99 – $42.40)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Cassie Sewald's NPI number?

The NPI number for Cassie Sewald is 1851104129. It was assigned to this individual provider in the NPPES registry on January 30, 2025.

Where is Cassie Sewald located?

Cassie Sewald practices at 2495 Hospital Dr Ste 525, Mountain View, CA 94040. The listed phone number is (650) 962-5829.

What is Cassie Sewald's specialty?

The primary specialty registered for this NPI is Advanced Practice Midwife with taxonomy code 367A00000X.

Is Cassie Sewald enrolled in Medicare?

Yes. Cassie Sewald is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Cassie Sewald's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Cassie Sewald reassigns Medicare benefits to Ucsf Health Medical Foundation (Emeryville, CA). 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 Cassie Sewald'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 Cassie Sewald was last updated on February 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months 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.