Quick answers
- Which hospitals does Mary E. Cavnar-Johnson work at?
- Medicare's official clinician data lists Mary E. Cavnar-Johnson at 3 hospitals: HCA Houston Healthcare Kingwood, Memorial Hermann Northeast Hospital and TOPS Surgical Specialty Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mary E. Cavnar-Johnson see patients?
- Medicare's clinician data lists 4 practice locations, including Kingwood, TX, Spring, TX and The Woodlands, TX. Call before your visit to confirm the address.
- What is Mary E. Cavnar-Johnson's specialty?
- Medicare lists General Practice as the primary specialty, and also Family Practice.
- Does Mary E. Cavnar-Johnson accept Medicare assignment?
- Yes. Medicare's clinician data says Mary E. Cavnar-Johnson 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 E. Cavnar-Johnson offer telehealth?
- Medicare's clinician data says Mary E. Cavnar-Johnson offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mary E. Cavnar-Johnson?
- (281) 319-8303, as listed in official Medicare / NPI Registry data.
- What is Mary E. Cavnar-Johnson's NPI number?
- 1467569400. 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 E. Cavnar-Johnson works
Medicare's Facility Affiliation Data lists Mary E. Cavnar-Johnson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- HCA Houston Healthcare KingwoodKingwood, TX · Acute Care Hospital · CCN 450775
- Memorial Hermann Northeast HospitalHumble, TX · Acute Care Hospital · CCN 450684
- TOPS Surgical Specialty HospitalHouston, TX · Acute Care Hospital · CCN 450774
Practice locations
Addresses where Mary E. Cavnar-Johnson is enrolled with Medicare (CMS data updated 2026-10-02).
- 22001 Northpark Dr, Suite 220Kingwood, TX 77339 (281) 319‑8303
- 2255 E Mossy Oaks Rd, Suite 500Spring, TX 77389 (281) 440‑5300
- 22751 Professional Dr, Suite 140Kingwood, TX 77339 (281) 440‑5300
- 9303 Pinecroft DrThe Woodlands, TX 77380 (281) 440‑5300
Group practices
Medicare enrollment lists Mary E. Cavnar-Johnson as a member of this group (CMS data updated 2026-10-02).
- David P Ellent PLLC58 clinicians in the group
Specialties
- General Practiceprimary
- Family Practicealso
Other general practitioners in Texas
Clinicians with the same Medicare primary specialty in Texas — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At San Antonio |
| Graduation year | 1986 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1467569400 |
| 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