Quick answers
- Which hospitals does Mary R. Schwartz work at?
- Medicare's official clinician data lists Mary R. Schwartz at 5 hospitals: Houston Methodist Clear Lake Hospital, Houston Methodist Hospital, Houston Methodist Sugar Land Hospital, Houston Methodist The Woodlands Hospital and Houston Methodist Willowbrook Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mary R. Schwartz see patients?
- Medicare's clinician data lists 8 practice locations, including Sugar Land, TX, The Woodlands, TX and Houston, TX. Call before your visit to confirm the address.
- What is Mary R. Schwartz's specialty?
- Medicare lists Pathology as the primary specialty.
- Does Mary R. Schwartz accept Medicare assignment?
- Yes. Medicare's clinician data says Mary R. Schwartz 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.
- What is the phone number for Mary R. Schwartz?
- (281) 274-7000, as listed in official Medicare / NPI Registry data.
- What is Mary R. Schwartz's NPI number?
- 1477501948. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mary R. Schwartz works
Medicare's Facility Affiliation Data lists Mary R. Schwartz at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Houston Methodist Clear Lake HospitalNassau Bay, TX · Acute Care Hospital · CCN 450709
- Houston Methodist HospitalHouston, TX · Acute Care Hospital · CCN 450358
- Houston Methodist Sugar Land HospitalSugar Land, TX · Acute Care Hospital · CCN 450820
- Houston Methodist The Woodlands HospitalThe Woodlands, TX · Acute Care Hospital · CCN 670122
- Houston Methodist Willowbrook HospitalHouston, TX · Acute Care Hospital · CCN 450844
Practice locations
Addresses where Mary R. Schwartz is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 8; the Medicare profile lists all.
- 16655 Southwest FwySugar Land, TX 77479 (281) 274‑7000
- 17201 Interstate 45 SThe Woodlands, TX 77385 (713) 441‑1771
- 18220 State Hwy 249Houston, TX 77070 (281) 477‑7100
- 18300 Houston Methodist DrHouston, TX 77058 (281) 333‑5503
- 18500 Katy FwyHouston, TX 77094 (832) 522‑1000
Group practices
Medicare enrollment lists Mary R. Schwartz as a member of this group (CMS data updated 2026-10-02).
- Methodist Pathology Associates PLLC82 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Sugar Land
Clinicians with the same Medicare primary specialty in Sugar Land, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Washington University School Of Medicine |
| Graduation year | 1978 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1477501948 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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