NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1770522633 MD
Verify on CMS → Hassan Alissa, MD
Rheumatology Physician in San Marcos, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,377 in Rheumatology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
2K
Medicare Part D claims · 496 beneficiaries · Rheumatology Physician avg: 2K
MIPS score
66.7/100
▼ 17 pts below national avg 83.5 · Mid-tier
Industry payments
$982.62
50 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Hassan Alissa, MD reported a CMS MIPS final score of 66.7/100 - below the 83.5 national average - and filed 2,485 Medicare Part D claims in 2024.
- 66.7/100
- MIPS score · -17 vs avg
- 2K
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥7th
- pct among measured MIPS (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Hassan Alissa, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1770522633), first enumerated 06/06/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 2,485 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 66.7/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$982.62 in reported industry payments (50 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Texas statewide board action statistics are published annually — these figures describe aggregate state activity, not Hassan Alissa, MD's individual license status. Verify directly with the state medical board.
Source: TMB annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1770522633 · Rheumatology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-LOW · RX-MID · BOOK-THIN · PHOTO-FINISH
- NPI-10 1770522633
- ENUM-LEGACY 2006
- TAX-MID 6K Rheumatology Physician
- MIPS-LOW 66.7/100
- RX-MID 2,485
- BOOK-THIN 417 in Texas
- PHOTO-FINISH Byung Ban · ±0.1
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Byung Ban · lowest
Byung Ban
66.6 MIPS pts
- John Goldman · n…
John Goldman
66.6 MIPS pts
- Madhurika Samaku…
Madhurika Samakur
66.6 MIPS pts
- Alissa · this pr…
Alissa · this provider
66.7 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Hassan Alissa, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
67 ≥ 7th percentile 7% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Hassan Alissa, MD sits
This provider among rheumatology physician peers
Across the 1,970 rheumatology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Hassan Alissa, MD writes more Part D claims than 65% of them and scores higher on MIPS quality than 8% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one rheumatology physician peer from a representative sample of 60; the gold marker is Hassan Alissa, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Hassan Alissa, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Hassan Alissa, MD?
Below national averagePrimary specialty
Rheumatology Physician
Medicare Part D claims
2,485 21% vs specialty avg
MIPS final score
66.7/100 16.8 pts vs avg
Specialty distribution in Texas
How Rheumatology Physician compares to other specialties among Texas providers
Medicare quality performance, MIPS
Hassan Alissa, MD's 2023 MIPS final score plotted against the Rheumatology Physician national average
- MIPS Final Score
- 66.7/100
- vs 83.5 national avg · 2023 performance year
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1770522633 |
|---|---|
| Specialty | Rheumatology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/06/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
66.67
Final Score
Measured-score avg: 83.5
82.9185
Quality
25.148
Cost
77
Promoting Interoperability
Reporting: Individual
Hospital and facility affiliations
Facilities where Hassan Alissa, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Arthritis Clinic OF Central Texas
San Marcos, TX
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Hassan Alissa, MD. Source: openpaymentsdata.cms.gov.
Total received
$983
Largest payer
ABBVIE INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - Texas TMB 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~77K Texas medical licensees in 2023 - they are NOT specific to Hassan Alissa, MD. To verify Hassan Alissa, MD's current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
2,485
Total Claims
$2.4M
Total Drug Cost
496
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,703.667
- Total Day Supply
- 107,093
- Generic Drug Cost
- $42K
- Opioid Claims
- 253 (10.2% rate)
- Antibiotic Claims
- 40
Patient Demographics
- Average Patient Age
- 68.6 years
- Avg HCC Risk Score
- 1.50
- Gender Split
- 80% female / 20% male
- Age Distribution
- <65: 115, 65-74: 227, 75-84: 138, 85+: 16
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Hassan Alissa, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Hydroxychloroquine…
Hydroxychloroquine Sulfate
381 claims
- Prednisone
Prednisone
320 claims
- Tramadol Hcl 126
Tramadol Hcl
126 claims
- Leflunomide 105
Leflunomide
105 claims
- Methotrexate 96
Methotrexate
96 claims
- Hydrocodone-Acetam… 90
Hydrocodone-Acetaminophen
90 claims
- Meloxicam 78
Meloxicam
78 claims
- Omeprazole 77
Omeprazole
77 claims
| Drug | Claims |
|---|---|
| Hydroxychloroquine Sulfate | 381 |
| Prednisone | 320 |
| Tramadol Hcl | 126 |
| Leflunomide | 105 |
| Methotrexate Methotrexate Sodium | 96 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 90 |
| Meloxicam | 78 |
| Omeprazole | 77 |
| Pregabalin | 65 |
| Enbrel Sureclick Etanercept | 62 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Hassan Alissa, MD fits within the Rheumatology Physician landscape nationally.
6,377
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,058
Avg Claims per Provider
Hassan Alissa, MD's 2,485 claims are above the specialty average of 2,058.
Nationwide Rheumatology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Alissa, both outside Texas so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (66.7 here).
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Rheumatology Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Alissa.
One of 417 Rheumatology Physician providers enrolled in Texas, 5 are shown here.
Dr. Michael Abel
MD
Fredericksburg, TX
Dr. Tareq Abou-Khamis
M.D.
Houston, TX
Dr. Robert Abresch
M.D.
El Paso, TX
Dr. Sampada Acharya
MD
Fort Worth, TX
Dr. Waffiyah Afridi
M.D.
Farmers Branch, TX
Compare Rheumatology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Hassan Alissa, MD's specialty? ▼
Hassan Alissa, MD specializes in Rheumatology Physician and practices in San Marcos, Texas. Credentials: MD.
How much does Hassan Alissa, MD prescribe under Medicare Part D? ▼
In 2024, Hassan Alissa, MD wrote 2,485 Medicare Part D claims totaling $2.4M in drug costs for 496 beneficiaries.
What is Hassan Alissa, MD's Medicare quality score? ▼
Hassan Alissa, MD has a CMS MIPS Final Score of 66.7/100 (Quality: 82.9, Cost: 25.1). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Hassan Alissa, MD located? ▼
Hassan Alissa, MD is located at 1340 WONDER WORLD DR, San Marcos, TX, 78666. Phone: (512) 667-7123.
What is Hassan Alissa, MD's NPI number? ▼
Hassan Alissa, MD's National Provider Identifier (NPI) is 1770522633, issued on 06/06/2006.
Does Hassan Alissa, MD prescribe opioids? ▼
Yes, Hassan Alissa, MD had 253 opioid claims in 2024 with an opioid prescribing rate of 10.2%.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,377 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,058 Medicare Part D claims per year.
What drugs does Hassan Alissa, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Hassan Alissa, MD's most frequently prescribed drugs include Hydroxychloroquine Sulfate, Prednisone, Tramadol Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Hassan Alissa, MD accept Medicare? ▼
Hassan Alissa, MD appears in CMS Medicare data with 2,485 Part D claims and 496 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Hassan Alissa, MD's credentials? ▼
Hassan Alissa, MD's NPI is 1770522633 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.