Margaret Lang-Williams, M.D.
Internal Medicine Physician · Houston, TX
Margaret Lang-Williams, M.D. is an internal medicine physician with a practice address in Houston, Texas, and NPI 1255389847, issued on May 5, 2006. Check the license (Texas H1720, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Margaret Lang-Williams
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- H1720 TX
Self-reported in NPPES; status is on the state search - Practice location
- 921 Gessner RD FL 8, Houston, TX 77024
- Phone
- (281) 516-0212
- Enumerated
- May 5, 2006
- Record last updated
- Mar 27, 2025
- Medicaid ID
- 084927501 TX
- Medicare enrollment
- Enrolled (PECOS I20100812000482); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 1984
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Verify Margaret Lang-Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license H1720Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.4 times the Medicare Part D claims of the average internal medicine physician in 2024
10,846 Medicare Part D claims for 718 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 154 claims were for opioids.
Most prescribed
- Levothyroxine Sodium520 claims
- Atorvastatin Calcium454 claims
- Rosuvastatin Calcium402 claims
- Amlodipine Besylate333 claims
- Pantoprazole Sodium287 claims
- Gabapentin252 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $800.65
36 payments; by number, the most common kind was food and beverage; the largest payer was Radius Health, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Tomball Regional Internal Medicine AssociatesTomball, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret Lang-Williams among 9,175 internal medicine physician records in Texas
Margaret Lang-Williams, M.D. is one of 9,175 internal medicine physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1984 · median 2004 among the 6,088 with a school on file
- Record last updated2025 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,488 internal medicine physician records list a practice address in Houston
They are 1,488 of the 61,221 NPPES records with a practice address in Houston, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Houston → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Saikrishna Aleti, M.D.Houston, TX 770241497770077
- Anna Alquiza, M.D.Houston, TX 770241639177850
- Ann Domask, M.D.Houston, TX 770241790780955
- Ankur Doshi, M.D.Houston, TX 770241659487650
- George Keith, M.D.Houston, TX 770241598748873
- Pratibha Kulkarni, M.D.Houston, TX 770241215972211
- Manish Parikh, MDHouston, TX 770241275580359
- Trevor Rabie, MDHouston, TX 770241285670661
Common questions
What is Margaret Lang-Williams, M.D.'s NPI number?
Margaret Lang-Williams, M.D.'s National Provider Identifier (NPI) is 1255389847, issued on May 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Lang-Williams, M.D. located?
The NPPES record lists a practice address at 921 Gessner RD FL 8, Houston, TX, 77024. Phone: (281) 516-0212. Providers update this record themselves, so call before visiting.
How can I verify Margaret Lang-Williams, M.D.'s license?
NPPES lists Texas license number H1720, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Margaret Lang-Williams, M.D. prescribe under Medicare Part D?
In 2024, Margaret Lang-Williams, M.D. had 10,846 Medicare Part D claims for 718 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.