Sumbul Islam, M.D.
Internal Medicine Physician · Sherman, TX
Sumbul Islam, M.D. is an internal medicine physician with a practice address in Sherman, Texas, and NPI 1992898860, issued on Oct 2, 2006. Check the license (Texas R4240, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Sumbul Islam
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- R4240 TX
Self-reported in NPPES; status is on the state search - Practice location
- 600 E Taylor St Ste 3011, Sherman, TX 75090
- Phone
- (903) 957-0417
- Enumerated
- Oct 2, 2006
- Record last updated
- Mar 4, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (903) 957-0242
- Medicaid ID
- 3753980-03 TX
- Medicare enrollment
- Enrolled (PECOS I20170911000125); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 600 E Taylor St Ste 3011
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Deborah Fisher, MDPain Medicine (Physical Medicine & Rehabilitation) Physician1083691554
Verify Sumbul Islam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license R4240Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.7 times the Medicare Part D claims of the average internal medicine physician in 2024
14,859 Medicare Part D claims for 634 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 767 claims were for opioids.
Most prescribed
- Levothyroxine Sodium570 claims
- Atorvastatin Calcium540 claims
- Gabapentin508 claims
- Pantoprazole Sodium464 claims
- Hydrocodone-Acetaminophen406 claims
- Amlodipine Besylate359 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: $937.77
71 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie 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 2 group practices
- Legacy Healthcare Services IncMcKinney, TX
- Visiting Doctors, PLLCSherman, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sumbul Islam among 9,175 internal medicine physician records in Texas
Sumbul Islam, 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
- Graduated1994 · median 2004 among the 6,088 with a school on file
- Record last updated2020 · 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).
19 internal medicine physician records list a practice address in Sherman
They are 19 of the 1,350 NPPES records with a practice address in Sherman, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Sherman → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Bradley Rue, MDSherman, TX 750901508835471
- Ferit AcarRowlett, TX 750881841260304
- Amina Anjum, MDSherman, TX 750921205093424
- Larry Christopher, M.D.Rowlett, TX 750881477623551
- Dale Davies, M.D.Sherman, TX 750921053498436
- Thitina JimmaRowlett, TX 750881235496779
- Mohammad Khalil, MDSherman, TX 750921962473660
- Michael Kim, DORowlett, TX 750881609496702
Common questions
What is Sumbul Islam, M.D.'s NPI number?
Sumbul Islam, M.D.'s National Provider Identifier (NPI) is 1992898860, issued on Oct 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sumbul Islam, M.D. located?
The NPPES record lists a practice address at 600 E Taylor St Ste 3011, Sherman, TX, 75090. Phone: (903) 957-0417. Providers update this record themselves, so call before visiting.
How can I verify Sumbul Islam, M.D.'s license?
NPPES lists Texas license number R4240, 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 Sumbul Islam, M.D. prescribe under Medicare Part D?
In 2024, Sumbul Islam, M.D. had 14,859 Medicare Part D claims for 634 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.