NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1740661909 MD
Verify on CMS → Jessica Williams, MD
Internal Medicine Physician in Saint Louis, Missouri.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 in Internal Medicine 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
737
Medicare Part D claims · 178 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
83%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
92.3/100
▲ 9 pts above national avg 83.5 · Exceptional
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Jessica Williams, MD reported a CMS MIPS final score of 92.3/100 - above the 83.5 national average - and filed 737 Medicare Part D claims in 2023.
- 92.3/100
- MIPS score · +9 vs avg
- 737
- Part D claims, 2023
- 83%
- generic prescribing
- 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.
Jessica Williams, 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.
92 Top 34% higher than 66% of 454,083 measured providers
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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Jessica Williams, MD sits
This provider among internal medicine physician peers
Across the 34,612 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Jessica Williams, MD writes more Part D claims than 52% of them and scores higher on MIPS quality than 66% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one internal medicine physician peer from a representative sample of 60; the gold marker is Jessica Williams, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Jessica Williams, 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 Jessica Williams, MD?
High performer (top quartile)Primary specialty
Internal Medicine Physician
Medicare Part D claims
737 73% vs specialty avg
MIPS final score
92.3/100 8.8 pts vs avg
Specialty distribution in Missouri
How Internal Medicine Physician compares to other specialties among Missouri providers
Medicare quality performance, MIPS
Jessica Williams, MD's 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 92.3/100
- vs 83.5 national avg · 2023 performance year
MIPS final score (Internal Medicine Physician) - 92.3/100 vs national avg 83.5
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).
Jessica Williams, MD appears in the CMS NPPES registry as an Internal Medicine Physician provider holding MD credentials at 5201 MID AMERICA PLZ, Saint Louis, MO, 63129, with a listed phone of (314) 286-2635. NPI 1740661909 was issued on 06/14/2015.
Medicare Part D records for calendar year 2023 show 737 prescription claims written by this provider, covering 178 Medicare beneficiaries and totaling roughly $792K in drug spend, split 17% brand-name and 83% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 92.3/100 for the 2023 performance year (Quality 73.8), compared with the 83.5 average among clinicians with a measured score.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 enrolled providers across 56 states and an average of 2,716 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 | 1740661909 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 06/14/2015 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
92.2614
Final Score
Measured-score avg: 83.5
73.8353
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Jessica Williams, 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.
Washington University
Saint Louis, MO
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
Jessica Williams, MD - brand share 17.0%
Internal Medicine Physician average
17% brand-name claims vs 83% generic, on 737 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
737
Total Claims
$792K
Total Drug Cost
178
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,197
- Total Day Supply
- 35,004
- Brand vs Generic
- 17% brand / 83% generic
- Brand Drug Cost
- $765K
- Generic Drug Cost
- $27K
Patient Demographics
- Average Patient Age
- 62.7 years
- Avg HCC Risk Score
- 2.30
- Gender Split
- 83% female / 17% male
- Age Distribution
- <65: 84, 65-74: 64, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Jessica Williams, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydroxychloroquine…
Hydroxychloroquine Sulfate
139 claims
- Prednisone
Prednisone
131 claims
- Methotrexate
Methotrexate
100 claims
- Azathioprine 34
Azathioprine
34 claims
- Humira Pen 30
Humira Pen
30 claims
- Mycophenolate Mofe… 25
Mycophenolate Mofetil
25 claims
- Sulfasalazine 21
Sulfasalazine
21 claims
- Diclofenac Sodium 20
Diclofenac Sodium
20 claims
| Drug | Claims |
|---|---|
| Hydroxychloroquine Sulfate | 139 |
| Prednisone | 131 |
| Methotrexate Methotrexate Sodium | 100 |
| Azathioprine | 34 |
| Humira Pen Adalimumab | 30 |
| Mycophenolate Mofetil | 25 |
| Sulfasalazine | 21 |
| Diclofenac Sodium | 20 |
| Leflunomide | 19 |
| Alendronate Sodium | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Jessica Williams, MD fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Jessica Williams, MD's 737 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Williams.
Dr. Betty Abban
M.D.
Springfield, MO
Dr. Amer Abbas
MD
Chesterfield, MO
Dr. Marghoob Abbas
M.D.
St. Joseph, MO
Dr. Muhammad Khalid Abbas
M.D.
Springfield, MO
Dr. Sundas Abbas
MD
Richmond Heights, MO
Compare Internal Medicine 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 Missouri medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Internal Medicine 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.
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Frequently Asked Questions
What is Jessica Williams, MD's specialty? ▼
Jessica Williams, MD specializes in Internal Medicine Physician and practices in Saint Louis, Missouri. Credentials: MD.
How much does Jessica Williams, MD prescribe under Medicare Part D? ▼
In 2023, Jessica Williams, MD wrote 737 Medicare Part D claims totaling $792K in drug costs for 178 beneficiaries.
What is Jessica Williams, MD's Medicare quality score? ▼
Jessica Williams, MD has a CMS MIPS Final Score of 92.3/100 (Quality: 73.8). 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 Jessica Williams, MD located? ▼
Jessica Williams, MD is located at 5201 MID AMERICA PLZ, Saint Louis, MO, 63129. Phone: (314) 286-2635.
What is Jessica Williams, MD's NPI number? ▼
Jessica Williams, MD's National Provider Identifier (NPI) is 1740661909, issued on 06/14/2015.
Does Jessica Williams, MD prescribe more brand-name or generic drugs? ▼
Jessica Williams, MD's prescribing is 17% brand-name and 83% generic drugs by claim count, with $765K in brand drug costs.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Jessica Williams, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Jessica Williams, MD's most frequently prescribed drugs include Hydroxychloroquine Sulfate, Prednisone, Methotrexate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Jessica Williams, MD accept Medicare? ▼
Jessica Williams, MD appears in CMS Medicare data with 737 Part D claims and 178 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jessica Williams, MD's credentials? ▼
Jessica Williams, MD's NPI is 1740661909 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.
- 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 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
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 May 2026.