Hassan M. Alissa, MD
Rheumatology Physician · San Marcos, TX
Hassan M. Alissa, MD is a rheumatology physician with a practice address in San Marcos, Texas, and NPI 1770522633, issued on Jun 6, 2006. Check the license (Texas M7820, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Hassan M. Alissa
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License numbers
- M7820 TX
2000160315 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1340 Wonder World Dr, San Marcos, TX 78666
- Phone
- (512) 667-7123
- Enumerated
- Jun 6, 2006
- Record last updated
- Feb 14, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (512) 667-7328
- Medicaid ID
- 205333818 MO
- Medicare enrollment
- Enrolled (PECOS I20081006000420); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 545 in Texas → Look up another NPI →
Also registered at 1340 Wonder World Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Hannah Christiansen, DPTPhysical Therapist1992495758
- Caroline Crunk, PTAPhysical Therapy Assistant1184393936
- Jennifer Driskell, MDFamily Medicine Physician1386634657
- Amanda Ivy, MDSports Medicine (Orthopaedic Surgery) Physician1518055508
- Tonya Stevens, PTPhysical Therapist1992769673
- Hector Vasquez, M.D.General Practice Physician1518075894
Verify Hassan M. Alissa in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license M7820Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% more Medicare Part D claims than the average rheumatology physician in 2024
2,485 Medicare Part D claims for 496 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. 253 claims were for opioids.
Most prescribed
- Hydroxychloroquine Sulfate381 claims
- Prednisone320 claims
- Tramadol Hcl126 claims
- Leflunomide105 claims
- Methotrexate96 claims
- Hydrocodone-Acetaminophen90 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 MIPS final score for 2023 (Medicare payment program): 66.7 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $982.62
50 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 4,486 providers of this specialty with any payment received $8,538.33 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
- Arthritis Clinic OF Central TexasSan Marcos, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Hassan M. Alissa among 545 rheumatology physician records in Texas
Hassan M. Alissa, MD is one of 545 rheumatology physician records with a practice address in Texas. 87% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 58% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1992 · median 2004 among the 417 with a school on file
- Record last updated2014 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Texas
There are 545 rheumatology physician records in Texas.
All 545 in Texas → Every provider in San Marcos → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Maria Salinas, M.D.San Marcos, TX 786661043530207
- Nada Elmagboul, M.D.Round Rock, TX 786651720217995
- Allyson McDonough, MDRound Rock, TX 786651912112319
- Sangeetha Pabolu, M.D.Round Rock, TX 786651093970022
- Olga Szalasny, MDRound Rock, TX 786651598808115
- Sindu YenigallaRound Rock, TX 786651629417985
- Mohammed Ahmed, MDRound Rock, TX 786641538443791
- Darush Rahmani, D.O.Round Rock, TX 786811598714495
Common questions
What is Hassan M. Alissa, MD's NPI number?
Hassan M. Alissa, MD's National Provider Identifier (NPI) is 1770522633, issued on Jun 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Hassan M. Alissa, MD located?
The NPPES record lists a practice address at 1340 Wonder World Dr, San Marcos, TX, 78666. Phone: (512) 667-7123. Providers update this record themselves, so call before visiting.
How can I verify Hassan M. Alissa, MD's license?
NPPES lists Texas license number M7820, 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 Hassan M. Alissa, MD prescribe under Medicare Part D?
In 2024, Hassan M. Alissa, MD had 2,485 Medicare Part D claims for 496 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Hassan M. Alissa, MD's MIPS final score?
The 2023 MIPS final score is 66.7 of 100. 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.