NPI registry status
Active
2026 NPPES data Neurology Physician NPI 1619992708 MD
Verify on CMS → Dorothy Williams, MD
Neurology Physician in Salt Lake City, Utah.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 19,885 in Neurology 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
204
Medicare Part D claims · 38 beneficiaries · Neurology Physician avg: 1K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Dorothy Williams, MD filed 204 Medicare Part D claims in 2023 as a Neurology Physician in Salt Lake City, Utah, prescribing 88% generic.
- 204
- Part D claims, 2023
- 88%
- 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.
Dorothy Williams, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
204 49th percentile higher than 49% 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)
Dorothy Williams, 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 Dorothy Williams, MD?
Quality data not reportedPrimary specialty
Neurology Physician
Medicare Part D claims
204 84% vs specialty avg
Specialty distribution in Utah
How Neurology Physician compares to other specialties among Utah 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 Neurology 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).
Dorothy Williams, MD appears in the CMS NPPES registry as a Neurology Physician provider holding MD credentials at 2295 FOOTHILL DR, Salt Lake City, UT, 84109, with a listed phone of (801) 486-3021. NPI 1619992708 was issued on 07/12/2006.
Medicare Part D records for calendar year 2023 show 204 prescription claims written by this provider, covering 38 Medicare beneficiaries and totaling roughly $18K in drug spend, split 12% brand-name and 88% generic by claim count.
Neurology Physician is a mid-sized specialty nationwide, with 19,885 enrolled providers across 54 states and an average of 1,309 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 | 1619992708 |
|---|---|
| Specialty | Neurology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 07/12/2006 |
Hospital and facility affiliations
Facilities where Dorothy 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.
University OF Utah Adult Services
Salt Lake City, UT
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
Dorothy Williams, MD - brand share 12.0%
Neurology Physician average
12% brand-name claims vs 88% generic, on 204 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.
204
Total Claims
$18K
Total Drug Cost
38
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 298
- Total Day Supply
- 8,155
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $14K
- Generic Drug Cost
- $4K
Patient Demographics
- Average Patient Age
- 68.6 years
- Avg HCC Risk Score
- 0.94
- Gender Split
- 68% female / 32% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Dorothy Williams, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Gabapentin
Gabapentin
33 claims
- Lamotrigine
Lamotrigine
24 claims
- Pregabalin
Pregabalin
16 claims
- Rizatriptan
Rizatriptan
14 claims
- Aimovig Autoinjector 12
Aimovig Autoinjector
12 claims
- Sumatriptan Succin… 11
Sumatriptan Succinate
11 claims
| Drug | Claims |
|---|---|
| Gabapentin | 33 |
| Lamotrigine | 24 |
| Pregabalin | 16 |
| Rizatriptan Rizatriptan Benzoate | 14 |
| Aimovig Autoinjector Erenumab-Aooe | 12 |
| Sumatriptan Succinate | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Neurology Physician Overview
How Dorothy Williams, MD fits within the Neurology Physician landscape nationally.
19,885
Neurology Physician Providers in US
54
States with Neurology Physician
1,309
Avg Claims per Provider
Dorothy Williams, MD's 204 claims are below the specialty average of 1,309.
Nearby Neurology Physician Providers in Utah
Other clinicians with the same primary specialty enrolled in Utah, drawn from the same CMS NPPES roster as Williams.
Dr. Nicholas Absalom
MD
Midvale, UT
Dr. Joseph Adachi
MD
Ogden, UT
Dr. Francisca Ahn
MD
Salt Lake City, UT
Dr. Tegan Ake
MD
Salt Lake City, UT
Dr. Ahmad Al Sadat
MD
Murray, UT
Compare Neurology 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 Utah medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Neurology 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 Dorothy Williams, MD's specialty? ▼
Dorothy Williams, MD specializes in Neurology Physician and practices in Salt Lake City, Utah. Credentials: MD.
How much does Dorothy Williams, MD prescribe under Medicare Part D? ▼
In 2023, Dorothy Williams, MD wrote 204 Medicare Part D claims totaling $18K in drug costs for 38 beneficiaries.
Where is Dorothy Williams, MD located? ▼
Dorothy Williams, MD is located at 2295 FOOTHILL DR, Salt Lake City, UT, 84109. Phone: (801) 486-3021.
What is Dorothy Williams, MD's NPI number? ▼
Dorothy Williams, MD's National Provider Identifier (NPI) is 1619992708, issued on 07/12/2006.
Does Dorothy Williams, MD prescribe more brand-name or generic drugs? ▼
Dorothy Williams, MD's prescribing is 12% brand-name and 88% generic drugs by claim count, with $14K in brand drug costs.
How many Neurology Physician providers are there in the US? ▼
There are 19,885 Neurology Physician providers across 54 states in the US. The average Neurology Physician provider writes 1,309 Medicare Part D claims per year.
What drugs does Dorothy Williams, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Dorothy Williams, MD's most frequently prescribed drugs include Gabapentin, Lamotrigine, Pregabalin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Dorothy Williams, MD accept Medicare? ▼
Dorothy Williams, MD appears in CMS Medicare data with 204 Part D claims and 38 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Dorothy Williams, MD's credentials? ▼
Dorothy Williams, MD's NPI is 1619992708 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.
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.