Cassie Li Xu, M.D.
Internal Medicine Physician · Tomball, TX
Cassie Li Xu, M.D. is an internal medicine physician with a practice address in Tomball, Texas, and NPI 1770947509, issued on Apr 7, 2016. Check the license (Texas R9704, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Cassie Li Xu
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- R9704 TX
Self-reported in NPPES; status is on the state search - Practice location
- 605 Holderrieth Blvd, Tomball, TX 77375
- Phone
- (832) 794-0044
- Enumerated
- Apr 7, 2016
- Record last updated
- Sep 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190909003494); accepts Medicare assignment
- Medical or professional school
- Indiana University School Of Medicine, 2016
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 605 Holderrieth Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Ault, CRNACertified Registered Nurse Anesthetist1154317196
- Azalea Bunch, NPNurse Practitioner1083662787
- Roger Collins, MDEmergency Medicine Physician1215000393
- Neal Epstein, M.D.Diagnostic Radiology Physician1043201080
- Kristin FeidMedical Physician Assistant1760852800
- Scott Freeman, PA-CMedical Physician Assistant1598825424
Verify Cassie Li Xu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license R9704Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average internal medicine physician in 2024
572 Medicare Part D claims for 223 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 39 claims were for opioids.
Most prescribed
- Pantoprazole Sodium41 claims
- Furosemide38 claims
- Clopidogrel34 claims
- Cefdinir33 claims
- Metoprolol Succinate26 claims
- Hydrocodone-Acetaminophen25 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 91.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Ddrg Physicians LLCTomball, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cassie Li Xu among 9,175 internal medicine physician records in Texas
Cassie Li Xu, 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 2016, is newer than 74% of them.
- NPI issued2016 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2016 · median 2004 among the 6,088 with a school on file
- Record last updated2021 · 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).
25 internal medicine physician records list a practice address in Tomball
They are 25 of the 1,068 NPPES records with a practice address in Tomball, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Tomball → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Asiya Ahmed, M.D.Tomball, TX 773751013966316
- Shamaila Aslam, MDTomball, TX 773751992748545
- Balbir Chahal, M.D.Tomball, TX 773751508850066
- Muhammad Irfan, M.D.Tomball, TX 773751972570489
- Adnan Jafri, M.D.Tomball, TX 773751699782417
- Mark Le, M.D.Tomball, TX 773751033153002
- David Le, M.D., P.A.Tomball, TX 773751861438525
- Hang Le, D.O.Tomball, TX 773751982618310
Common questions
What is Cassie Li Xu, M.D.'s NPI number?
Cassie Li Xu, M.D.'s National Provider Identifier (NPI) is 1770947509, issued on Apr 7, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Cassie Li Xu, M.D. located?
The NPPES record lists a practice address at 605 Holderrieth Blvd, Tomball, TX, 77375. Phone: (832) 794-0044. Providers update this record themselves, so call before visiting.
How can I verify Cassie Li Xu, M.D.'s license?
NPPES lists Texas license number R9704, 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 Cassie Li Xu, M.D. prescribe under Medicare Part D?
In 2024, Cassie Li Xu, M.D. had 572 Medicare Part D claims for 223 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Cassie Li Xu, M.D.'s MIPS final score?
The 2023 MIPS final score is 91.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.