NPI registry status
Active
2026 NPPES data Physical Medicine & Rehabilitation Physician NPI 1396796413 M.D.
Verify on CMS → William Barrish, M.D.
Physical Medicine & Rehabilitation Physician in Lewes, Delaware.
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
157
Medicare Part D claims · 54 beneficiaries · Physical Medicine & Rehabilitation Physician avg: 781
Generic prescribing
78%
generic claims · 22% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
0/100
▼ 83 pts below national avg 83.1 · Penalty band
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
William Barrish, M.D. reported a CMS MIPS final score of 0/100 - below the 83.1 national average - and filed 157 Medicare Part D claims in 2023.
- 0/100
- MIPS score · -83 vs avg
- 157
- Part D claims, 2023
- 78%
- 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.
William Barrish, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
0 0th percentile higher than 0% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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 William Barrish, M.D. sits
This provider among physical medicine & rehabilitation physician peers
Across the 2,781 physical medicine & rehabilitation physician providers who report both Medicare Part D prescribing and a MIPS quality score, William Barrish, M.D. writes more Part D claims than 30% of them and scores higher on MIPS quality than 0% - placing this provider in the lower-volume, lower-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 physical medicine & rehabilitation physician peer from a representative sample of 60; the gold marker is William Barrish, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
William Barrish, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 William Barrish, M.D.?
Below national averagePrimary specialty
Physical Medicine & Rehabilitation Physician
Medicare Part D claims
157 80% vs specialty avg
MIPS final score
0/100 83.1 pts vs avg
Specialty distribution in Delaware
How Physical Medicine & Rehabilitation Physician compares to other specialties among Delaware providers
Medicare quality performance, MIPS
William Barrish, M.D.'s 2023 MIPS final score plotted against the Physical Medicine & Rehabilitation Physician national average
- MIPS Final Score
- 0/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Physical Medicine & Rehabilitation Physician) - 0/100 vs national avg 83.1
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).
William Barrish, M.D. appears in the CMS NPPES registry as a Physical Medicine & Rehabilitation Physician provider holding M.D. credentials at 17637 SHADY RD UNIT 102, Lewes, DE, 19958, with a listed phone of (302) 430-3205. NPI 1396796413 was issued on 05/13/2006.
Medicare Part D records for calendar year 2023 show 157 prescription claims written by this provider, covering 54 Medicare beneficiaries and totaling roughly $65K in drug spend, split 22% brand-name and 78% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 0/100 for the 2023 performance year (Quality 0), compared with the national average of 83.1.
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 | 1396796413 |
|---|---|
| Specialty | Physical Medicine & Rehabilitation Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 05/13/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
0
Final Score
Avg: 83.1
0
Quality
Reporting: Individual
Brand vs generic prescribing mix · Typical
William Barrish, M.D. - brand share 22.0%
Physical Medicine & Rehabilitation Physician average
22% brand-name claims vs 78% generic, on 157 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.
157
Total Claims
$65K
Total Drug Cost
54
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 329
- Total Day Supply
- 9,485
- Brand vs Generic
- 22% brand / 78% generic
- Brand Drug Cost
- $62K
- Generic Drug Cost
- $3K
Patient Demographics
- Average Patient Age
- 73.3 years
- Avg HCC Risk Score
- 1.11
- Gender Split
- 63% female / 37% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What William Barrish, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Gabapentin
Gabapentin
40 claims
- Botox
Botox
35 claims
- Meloxicam
Meloxicam
22 claims
- Baclofen
Baclofen
19 claims
- Cyclobenzaprine Hcl 14
Cyclobenzaprine Hcl
14 claims
| Drug | Claims |
|---|---|
| Gabapentin | 40 |
| Botox Onabotulinumtoxina | 35 |
| Meloxicam | 22 |
| Baclofen | 19 |
| Cyclobenzaprine Hcl | 14 |
* 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 DE →
All providers in Delaware →
Compare specialties →
Physical Medicine & Rehabilitation Physician Overview
How William Barrish, 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
William Barrish, M.D.'s 157 claims are below the specialty average of 781.
Nearby Physical Medicine & Rehabilitation Physician Providers in Delaware
Other clinicians with the same primary specialty enrolled in Delaware, drawn from the same CMS NPPES roster as Barrish.
Dr. Douglas Adams
DPT
Wilmington, DE
Dr. Jennifer Atwood
PT
Middletown, DE
Dr. Stephen Beneck
M.D.
Wilmington, DE
Dr. Andrew Bernstein
DPT, PT
Wilmington, DE
Dr. George Bohatiuk
MD
Newark, DE
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 Delaware 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 William Barrish, M.D.'s specialty? ▼
William Barrish, M.D. specializes in Physical Medicine & Rehabilitation Physician and practices in Lewes, Delaware. Credentials: M.D..
How much does William Barrish, M.D. prescribe under Medicare Part D? ▼
In 2023, William Barrish, M.D. wrote 157 Medicare Part D claims totaling $65K in drug costs for 54 beneficiaries.
What is William Barrish, M.D.'s Medicare quality score? ▼
William Barrish, M.D. has a CMS MIPS Final Score of 0/100 (Quality: 0). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is William Barrish, M.D. located? ▼
William Barrish, M.D. is located at 17637 SHADY RD UNIT 102, Lewes, DE, 19958. Phone: (302) 430-3205.
What is William Barrish, M.D.'s NPI number? ▼
William Barrish, M.D.'s National Provider Identifier (NPI) is 1396796413, issued on 05/13/2006.
Does William Barrish, M.D. prescribe more brand-name or generic drugs? ▼
William Barrish, M.D.'s prescribing is 22% brand-name and 78% generic drugs by claim count, with $62K in brand drug costs.
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 William Barrish, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, William Barrish, M.D.'s most frequently prescribed drugs include Gabapentin, Botox, Meloxicam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Barrish, M.D. accept Medicare? ▼
William Barrish, M.D. appears in CMS Medicare data with 157 Part D claims and 54 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Barrish, M.D.'s credentials? ▼
William Barrish, M.D.'s NPI is 1396796413 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.
- 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
Compiled from official public sources by the PlainDoctor editorial team.