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MARA TA CAO MD
NPI 1154966091
Internal Medicine in San Francisco, CA

Active since November 14, 2019PECOS EnrolledAccepts Medicare Assignment
1580 VALENCIA STREET LEVEL 3, SAN FRANCISCO, CA 94110(415) 600-5400(415) 369-1397 Get Directions Write a Review

NPPES record last updated: November 21, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Nov 21, 2025, Oct 10, 2025, Nov 14, 2019 (3 updates tracked since 2019).

About Mara Ta Cao Md NPPES

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

MARA TA CAO MD (NPI 1154966091) is an individual internal medicine provider in San Francisco, California, licensed in California (A194823) and active in the NPI registry since November 2019. She is enrolled in Medicare PECOS and is a graduate of Other (2021).

NPPES Registry Identity

NPI1154966091
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameMARA TA CAOCredential: MD
Location Address1580 VALENCIA STREET LEVEL 3San Francisco, CA 94110
Mailing Address1580 Valencia StSan Francisco, CA 94110-4423 · (415) 600-5400 · Fax (415) 369-1397
Phone(415) 600-5400
Fax(415) 369-1397
Sole ProprietorNo
Medical School CMSOtherGraduated 2021
Enumeration DateNovember 14, 2019
Last NPPES UpdateNovember 21, 20253 updates tracked since enumeration
NPPES CertifiedNovember 21, 2025
✔ NPI 1154966091 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A194823
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
1580 VALENCIA STREET LEVEL 3, San Francisco, CA 94110
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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 and accepts Medicare assignment

Mara Ta Cao 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.

PECOS PAC ID3173010816
PECOS Enrollment IDI20251015003628
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 Mara Cao reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sutter Bay Medical Foundation
16 mi
Multi-Specialty
12 CAMINO ENCINAS
Orinda, CA 94563
  • Reassigned Medicare billing, California enrollment
  • 4,479 clinicians in this Medicare group
NPI 1366898538 (510) 204-8180

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 94110 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
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.

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 Cao's NPI number?

The NPI number for Mara Cao is 1154966091. It was assigned to this individual provider in the NPPES registry on November 14, 2019.

Where is Mara Cao located?

Mara Cao practices at 1580 Valencia Street Level 3, San Francisco, CA 94110. The listed phone number is (415) 600-5400.

What is Mara Cao's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Mara Cao enrolled in Medicare?

Yes. Mara Cao 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 Mara Cao's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mara Cao reassigns Medicare benefits to Sutter Bay Medical Foundation (Orinda, 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 Mara Cao'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 Cao was last updated on November 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.