Quick answers
- Which hospitals does Ather A. Siddiqi work at?
- Medicare's official clinician data lists Ather A. Siddiqi at 4 hospitals: CHI St. Luke's Lakeside Hospital, HCA Houston Healthcare Kingwood, HCA Houston Healthcare Northwest and St. Luke's The Woodlands Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ather A. Siddiqi see patients?
- Medicare's clinician data lists 5 practice locations, including Houston, TX, The Woodlands, TX and Cypress, TX. Call before your visit to confirm the address.
- What is Ather A. Siddiqi's specialty?
- Medicare lists Radiation Oncology as the primary specialty, and also Internal Medicine.
- Does Ather A. Siddiqi accept Medicare assignment?
- Yes. Medicare's clinician data says Ather A. Siddiqi 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 Ather A. Siddiqi?
- (281) 558-3444, as listed in official Medicare / NPI Registry data.
- What is Ather A. Siddiqi's NPI number?
- 1508893702. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ather A. Siddiqi works
Medicare's Facility Affiliation Data lists Ather A. Siddiqi at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- CHI St. Luke's Lakeside HospitalThe Woodlands, TX · Acute Care Hospital · CCN 670059
- HCA Houston Healthcare KingwoodKingwood, TX · Acute Care Hospital · CCN 450775
- HCA Houston Healthcare NorthwestHouston, TX · Acute Care Hospital · CCN 450638
- St. Luke's The Woodlands HospitalThe Woodlands, TX · Acute Care Hospital · CCN 450862
Practice locations
Addresses where Ather A. Siddiqi is enrolled with Medicare (CMS data updated 2026-10-02).
- 12141 Richmond AveHouston, TX 77082 (281) 558‑3444
- 17198 St Lukes Way, Suite 100The Woodlands, TX 77384 (936) 266‑2500
- 17350 St Lukes Way, Suite 400The Woodlands, TX 77384 (281) 444‑3278
- 21214 Northwest Fwy, HCA Houston N CypressCypress, TX 77429 (832) 912‑3500
- 710 Cypress Creek PkwyHouston, TX 77090 (281) 440‑1000
Group practices
Medicare enrollment lists Ather A. Siddiqi as a member of these groups (CMS data updated 2026-10-02).
- Hospital Medicine Services of TX, PLLC378 clinicians in the group
- Baylor St. Luke's Medical Group170 clinicians in the group
Specialties
- Radiation Oncologyprimary
- Internal Medicinealso
Other radiation oncologists in Houston
Clinicians with the same Medicare primary specialty in Houston, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1997 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508893702 |
| 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