NPI registry status
Active
2026 NPPES data Physical Medicine & Rehabilitation Physician NPI 1871737403 M.D.
Verify on CMS → Parley Williams, M.D.
Physical Medicine & Rehabilitation Physician in Murray, 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 15,306 in Physical Medicine & Rehabilitation 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
461
Medicare Part D claims · 64 beneficiaries · Physical Medicine & Rehabilitation Physician avg: 781
Generic prescribing
84%
generic claims · 16% 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
Parley Williams, M.D. filed 461 Medicare Part D claims in 2023 as a Physical Medicine & Rehabilitation Physician in Murray, Utah, prescribing 84% generic.
- 461
- Part D claims, 2023
- 84%
- 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.
Parley Williams, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
461 Top 38% higher than 62% 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)
Parley Williams, M.D. 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 Parley Williams, M.D.?
Quality data not reportedPrimary specialty
Physical Medicine & Rehabilitation Physician
Medicare Part D claims
461 41% vs specialty avg
Specialty distribution in Utah
How Physical Medicine & Rehabilitation 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 Physical Medicine & Rehabilitation 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).
Parley Williams, M.D. appears in the CMS NPPES registry as a Physical Medicine & Rehabilitation Physician provider holding M.D. credentials at 5171 S COTTONWOOD ST STE 810, Murray, UT, 84107, with a listed phone of (801) 507-9800. NPI 1871737403 was issued on 04/27/2009.
Medicare Part D records for calendar year 2023 show 461 prescription claims written by this provider, covering 64 Medicare beneficiaries and totaling roughly $77K in drug spend, split 16% brand-name and 84% generic by claim count, with an opioid prescribing rate of 3.9%.
Physical Medicine & Rehabilitation Physician is a mid-sized specialty nationwide, with 15,306 enrolled providers across 54 states and an average of 781 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 | 1871737403 |
|---|---|
| Specialty | Physical Medicine & Rehabilitation Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 04/27/2009 |
Hospital and facility affiliations
Facilities where Parley Williams, M.D. 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.
Ihc Health Services Inc
South Jordan, 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
Parley Williams, M.D. - brand share 16.0%
Physical Medicine & Rehabilitation Physician average
16% brand-name claims vs 84% generic, on 461 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.
461
Total Claims
$77K
Total Drug Cost
64
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 636
- Total Day Supply
- 18,303
- Brand vs Generic
- 16% brand / 84% generic
- Brand Drug Cost
- $64K
- Generic Drug Cost
- $12K
- Opioid Claims
- 18 (3.9% rate)
Patient Demographics
- Average Patient Age
- 59.1 years
- Avg HCC Risk Score
- 1.34
- Gender Split
- 44% female / 56% male
- Age Distribution
- <65: 34, 65-74: 21, 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 Parley Williams, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Baclofen
Baclofen
64 claims
- Aimovig Autoinjector
Aimovig Autoinjector
51 claims
- Gabapentin
Gabapentin
30 claims
- Buspirone Hcl 23
Buspirone Hcl
23 claims
- Trazodone Hcl 22
Trazodone Hcl
22 claims
- Amantadine 18
Amantadine
18 claims
- Dextroamphetamine-… 15
Dextroamphetamine-Amphetamine
15 claims
- Topiramate 15
Topiramate
15 claims
| Drug | Claims |
|---|---|
| Baclofen | 64 |
| Aimovig Autoinjector Erenumab-Aooe | 51 |
| Gabapentin | 30 |
| Buspirone Hcl | 23 |
| Trazodone Hcl | 22 |
| Amantadine Amantadine Hcl | 18 |
| Dextroamphetamine-Amphetamine Dextroamphetamine/Amphetamine | 15 |
| Topiramate | 15 |
| Cyclobenzaprine Hcl | 13 |
| Tramadol Hcl | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Physical Medicine & Rehabilitation Physician in UT →
All providers in Utah →
Compare specialties →
Physical Medicine & Rehabilitation Physician Overview
How Parley Williams, M.D. fits within the Physical Medicine & Rehabilitation Physician landscape nationally.
15,306
Physical Medicine & Rehabilitation Physician Providers in US
54
States with Physical Medicine & Rehabilitation Physician
781
Avg Claims per Provider
Parley Williams, M.D.'s 461 claims are below the specialty average of 781.
Nearby Physical Medicine & Rehabilitation Physician Providers in Utah
Other clinicians with the same primary specialty enrolled in Utah, drawn from the same CMS NPPES roster as Williams.
Dr. Svetlana Abrams
D.O.
Riverton, UT
Dr. Scott Adelman
MD
Sandy, UT
Dr. Audrey Adler
MD
Salt Lake City, UT
Dr. Zoe Adler
M.D.
Logan, UT
Dr. Beverly Aganon
DPT
Draper, UT
Compare Physical Medicine & Rehabilitation 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 Physical Medicine & Rehabilitation 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 Parley Williams, M.D.'s specialty? ▼
Parley Williams, M.D. specializes in Physical Medicine & Rehabilitation Physician and practices in Murray, Utah. Credentials: M.D..
How much does Parley Williams, M.D. prescribe under Medicare Part D? ▼
In 2023, Parley Williams, M.D. wrote 461 Medicare Part D claims totaling $77K in drug costs for 64 beneficiaries.
Where is Parley Williams, M.D. located? ▼
Parley Williams, M.D. is located at 5171 S COTTONWOOD ST STE 810, Murray, UT, 84107. Phone: (801) 507-9800.
What is Parley Williams, M.D.'s NPI number? ▼
Parley Williams, M.D.'s National Provider Identifier (NPI) is 1871737403, issued on 04/27/2009.
Does Parley Williams, M.D. prescribe more brand-name or generic drugs? ▼
Parley Williams, M.D.'s prescribing is 16% brand-name and 84% generic drugs by claim count, with $64K in brand drug costs.
Does Parley Williams, M.D. prescribe opioids? ▼
Yes, Parley Williams, M.D. had 18 opioid claims in 2023 with an opioid prescribing rate of 3.9%.
How many Physical Medicine & Rehabilitation Physician providers are there in the US? ▼
There are 15,306 Physical Medicine & Rehabilitation Physician providers across 54 states in the US. The average Physical Medicine & Rehabilitation Physician provider writes 781 Medicare Part D claims per year.
What drugs does Parley Williams, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Parley Williams, M.D.'s most frequently prescribed drugs include Baclofen, Aimovig Autoinjector, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Parley Williams, M.D. accept Medicare? ▼
Parley Williams, M.D. appears in CMS Medicare data with 461 Part D claims and 64 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Parley Williams, M.D.'s credentials? ▼
Parley Williams, M.D.'s NPI is 1871737403 with credentials M.D.. 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.