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DR. SARAH STARK LOWENTHAL M.D.
NPI 1790813046
Family Medicine in Mill Valley, CA

Active since February 28, 2007Opted out of Medicare · through May 21, 2027
655 REDWOOD HWY FRONTAGE RD STE 364, MILL VALLEY, CA 94941(415) 590-6150(415) 578-3118 Get Directions Write a Review

NPPES record last updated: February 19, 2019. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Feb 19, 2019, Aug 29, 2017, Apr 17, 2017 (3 updates tracked since 2017).

About Dr. Sarah Stark Lowenthal M.d. NPPES

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

DR. SARAH STARK LOWENTHAL M.D. (NPI 1790813046) is an individual family medicine provider in Mill Valley, California, licensed in California (A80735) and active in the NPI registry since February 2007. She has opted out of Medicare through May 21, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1790813046
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameDR. SARAH STARK LOWENTHALCredential: M.D.
Location Address655 REDWOOD HWY FRONTAGE RD STE 364Mill Valley, CA 94941-3057
Mailing Address130 Sutter St Fl 2San Francisco, CA 94104-4009 · (415) 658-6791 · Fax (415) 520-0904
Phone(415) 590-6150
Fax(415) 578-3118
Sole ProprietorYes
Enumeration DateFebruary 28, 2007
Last NPPES UpdateFebruary 19, 20193 updates tracked since enumeration
✔ NPI 1790813046 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · A80735
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
655 REDWOOD HWY FRONTAGE RD STE 364, Mill Valley, CA 94941
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

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Opted out of Medicare

Dr. Sarah Stark Lowenthal M.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from May 21, 2019 through May 21, 2027.

Opt-Out Effective DateMay 21, 2019
Opt-Out In Effect ThroughMay 21, 2027Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94941 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
$104.67 typical visit price
range $69.07 – $202.63
Typical copayment $26.16 (range $17.26 – $50.65)
Most-billed visit code 99203
Established Patient
$119.61 typical visit price
range $23.44 – $166.64
Typical copayment $29.90 (range $5.86 – $41.66)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SARAH LOWENTHAL, M.D., A PROFESSIONAL CORPORATION
Family Medicine
655 REDWOOD HWY FRONTAGE RD STE 364
MILL VALLEY, CA 94941
Marin County (415) 569-4918

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 Sarah Lowenthal's NPI number?

The NPI number for Sarah Lowenthal is 1790813046. It was assigned to this individual provider in the NPPES registry on February 28, 2007.

Where is Sarah Lowenthal located?

Sarah Lowenthal practices at 655 Redwood Hwy Frontage Rd Ste 364, Mill Valley, CA 94941. The listed phone number is (415) 590-6150.

What is Sarah Lowenthal's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Sarah Lowenthal enrolled in Medicare?

No. Sarah Lowenthal has opted out of Medicare through May 21, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Sarah Lowenthal was last updated on February 19, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.