Quick answers
- Where does Mary Willis see patients?
- Medicare's clinician data lists 2 practice locations, including Austin, TX and South San Francisco, CA. Call before your visit to confirm the address.
- What is Mary Willis's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Mary Willis accept Medicare assignment?
- Yes. Medicare's clinician data says Mary Willis accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Mary Willis offer telehealth?
- Medicare's clinician data says Mary Willis offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mary Willis?
- (650) 761-4056, as listed in official Medicare / NPI Registry data.
- What is Mary Willis's NPI number?
- 1003035148. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Mary Willis is enrolled with Medicare (CMS data updated 2026-10-02).
- 2021 Guadalupe StAustin, TX 78705 (650) 761‑4056
- 611 Gateway Blvd, Suite 120South San Francisco, CA 94080 (650) 761‑4056
Group practices
Medicare enrollment lists Mary Willis as a member of these groups (CMS data updated 2026-10-02).
- Dreem Sleep Clinic of California34 clinicians in the group
- Dreem Sleep Clinic PA12 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Austin
Clinicians with the same Medicare primary specialty in Austin, TX — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2005 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1003035148 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians