Quick answers
- Does Margaret Lang Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Margaret Lang Williams accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Margaret Lang Williams see?
- In 2024, CMS data shows 477 Original Medicare patients and 10,363 services for Margaret Lang Williams. This counts Original Medicare only and measures volume, not quality.
- What is Margaret Lang Williams's NPI number?
- 1255389847. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Margaret Lang Williams, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 477 |
|---|---|
| Services billed to Medicare | 10,363 |
| Different services or procedures | 53 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Injection, denosumab, 1 mg (J0897)3,361 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)318 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)293 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)290 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)227 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Ischemic heart disease51%
- Chronic kidney disease34%
- Diabetes31%
Hospitals where Margaret Lang Williams works
Medicare's Facility Affiliation Data lists Margaret Lang Williams at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- HCA Houston Healthcare KingwoodKingwood, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · CCN 450775
- HCA Houston Healthcare TomballTomball, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · CCN 450670
- Houston Methodist The Woodlands HospitalThe Woodlands, TX · Acute Care Hospital · Medicare rating: 5 of 5 stars · CCN 670122
- Houston Methodist Willowbrook HospitalHouston, TX · Acute Care Hospital · Medicare rating: 5 of 5 stars · CCN 450844
- TOPS Surgical Specialty HospitalHouston, TX · Acute Care Hospital · CCN 450774
Practice locations
Addresses where Margaret Lang Williams is enrolled with Medicare (CMS data updated October 2, 2026).
- 13414 Medical Complex DrTomball, TX 77375 (281) 516‑0212
Group practices
Medicare enrollment lists Margaret Lang Williams as a member of this group (CMS data updated October 2, 2026).
- Tomball Regional Internal Medicine Associates2 clinicians in the group
Specialties
- Internal Medicineprimary
- Hospitalistalso
Other internal medicine doctors in Tomball
Clinicians with the same Medicare primary specialty in Tomball, TX — not a recommendation.
Other clinicians in Tomball Regional Internal Medicine Associates
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tufts University School Of Medicine |
| Graduation year | 1984 (42 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1255389847 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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