NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1194851394 MD
Verify on CMS → Sonia Yousuf, MD
Rheumatology Physician in Austin, 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 6,181 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 · 351 beneficiaries · Rheumatology Physician avg: 2K
Industry payments
$17.88
1 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Sonia Yousuf, MD filed 2,486 Medicare Part D claims in 2023 as a Rheumatology Physician in Austin, Texas.
- 2K
- Part D claims, 2023
- Likely
- board-certified (heuristic)
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.
Sonia Yousuf, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,486 Top 14% higher than 86% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. 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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Sonia Yousuf, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Sonia Yousuf, MD?
Quality data not reportedPrimary specialty
Rheumatology Physician
Medicare Part D claims
2,486 21% vs specialty avg
Specialty distribution in Texas
How Rheumatology Physician compares to other specialties among Texas providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Rheumatology Physician. Verify directly:
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).
Sonia Yousuf, MD appears in the CMS NPPES registry as a Rheumatology Physician provider holding MD credentials at 1807 W SLAUGHTER LN, Austin, TX, 78748, with a listed phone of (512) 282-8937. NPI 1194851394 was issued on 02/24/2007.
Medicare Part D records for calendar year 2023 show 2,486 prescription claims written by this provider, covering 351 Medicare beneficiaries and totaling roughly $2.2 million in drug spend, with an opioid prescribing rate of 2.1%.
Rheumatology Physician is a mid-sized specialty nationwide, with 6,181 enrolled providers across 52 states and an average of 2,054 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1194851394 |
|---|---|
| Specialty | Rheumatology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 02/24/2007 |
Hospital and facility affiliations
Facilities where Sonia Yousuf, 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.
Austin Regional Clinic PA
Round Rock, 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 Sonia Yousuf, MD. Source: openpaymentsdata.cms.gov.
Total received
$18
Largest payer
Janssen Biotech, 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 Sonia Yousuf, MD. To verify Sonia Yousuf, 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 2023.
2,486
Total Claims
$2.2M
Total Drug Cost
351
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,709
- Total Day Supply
- 138,044
- Generic Drug Cost
- $80K
- Opioid Claims
- 51 (2.1% rate)
- Antibiotic Claims
- 27
Patient Demographics
- Average Patient Age
- 71.2 years
- Avg HCC Risk Score
- 1.35
- Gender Split
- 80% female / 20% male
- Age Distribution
- <65: 29, 65-74: 214, 75-84: 95, 85+: 13
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Sonia Yousuf, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Methotrexate
Methotrexate
512 claims
- Hydroxychloroquine…
Hydroxychloroquine Sulfate
441 claims
- Prednisone 204
Prednisone
204 claims
- Gabapentin 179
Gabapentin
179 claims
- Alendronate Sodium 120
Alendronate Sodium
120 claims
- Allopurinol 115
Allopurinol
115 claims
- Leflunomide 74
Leflunomide
74 claims
- Enbrel Sureclick 69
Enbrel Sureclick
69 claims
| Drug | Claims |
|---|---|
| Methotrexate Methotrexate Sodium | 512 |
| Hydroxychloroquine Sulfate | 441 |
| Prednisone | 204 |
| Gabapentin | 179 |
| Alendronate Sodium | 120 |
| Allopurinol | 115 |
| Leflunomide | 74 |
| Enbrel Sureclick Etanercept | 69 |
| Folic Acid | 58 |
| Azathioprine | 57 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Sonia Yousuf, MD fits within the Rheumatology Physician landscape nationally.
6,181
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,054
Avg Claims per Provider
Sonia Yousuf, MD's 2,486 claims are above the specialty average of 2,054.
Nearby Rheumatology Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Yousuf.
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 →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Texas medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Rheumatology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
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How insurance networks affect your costs
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Frequently Asked Questions
What is Sonia Yousuf, MD's specialty? ▼
Sonia Yousuf, MD specializes in Rheumatology Physician and practices in Austin, Texas. Credentials: MD.
How much does Sonia Yousuf, MD prescribe under Medicare Part D? ▼
In 2023, Sonia Yousuf, MD wrote 2,486 Medicare Part D claims totaling $2.2M in drug costs for 351 beneficiaries.
Where is Sonia Yousuf, MD located? ▼
Sonia Yousuf, MD is located at 1807 W SLAUGHTER LN, Austin, TX, 78748. Phone: (512) 282-8937.
What is Sonia Yousuf, MD's NPI number? ▼
Sonia Yousuf, MD's National Provider Identifier (NPI) is 1194851394, issued on 02/24/2007.
Does Sonia Yousuf, MD prescribe opioids? ▼
Yes, Sonia Yousuf, MD had 51 opioid claims in 2023 with an opioid prescribing rate of 2.1%.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,181 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,054 Medicare Part D claims per year.
What drugs does Sonia Yousuf, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Sonia Yousuf, MD's most frequently prescribed drugs include Methotrexate, Hydroxychloroquine Sulfate, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Sonia Yousuf, MD accept Medicare? ▼
Sonia Yousuf, MD appears in CMS Medicare data with 2,486 Part D claims and 351 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Sonia Yousuf, MD's credentials? ▼
Sonia Yousuf, MD's NPI is 1194851394 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 (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- 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 April 2026 (NPPES) / 2023 (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
Compiled from official public sources by the PlainDoctor editorial team.