NPI registry status
Active
2026 NPPES data Sleep Medicine (Psychiatry & Neurology) Physician NPI 1245350164 MD
Verify on CMS → Ian Merrill, MD
Sleep Medicine (Psychiatry & Neurology) Physician in Seattle, Washington.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 376 in Sleep Medicine (Psychiatry & 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
256
Medicare Part D claims · 49 beneficiaries · Sleep Medicine (Psychiatry & Neurology) Physician avg: 1K
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
82.8/100
▼ 0 pts below national avg 83.1 · Above neutral
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
Ian Merrill, MD reported a CMS MIPS final score of 82.8/100 - below the 83.1 national average - and filed 256 Medicare Part D claims in 2023.
- 82.8/100
- MIPS score · 0 vs avg
- 256
- Part D claims, 2023
- 95%
- 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.
Ian Merrill, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
83 39th percentile higher than 39% 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 Ian Merrill, MD sits
This provider among sleep medicine (psychiatry & neurology) physician peers
Across the 126 sleep medicine (psychiatry & neurology) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Ian Merrill, MD writes more Part D claims than 33% of them and scores higher on MIPS quality than 44% - 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 sleep medicine (psychiatry & neurology) physician peer from a representative sample of 60; the gold marker is Ian Merrill, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Ian Merrill, 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 Ian Merrill, MD?
Near national averagePrimary specialty
Sleep Medicine (Psychiatry & Neurology) Physician
Medicare Part D claims
256 75% vs specialty avg
MIPS final score
82.8/100 0.3 pts vs avg
Specialty distribution in Washington
How Sleep Medicine (Psychiatry & Neurology) Physician compares to other specialties among Washington providers
Medicare quality performance, MIPS
Ian Merrill, MD's 2023 MIPS final score plotted against the Sleep Medicine (Psychiatry & Neurology) Physician national average
- MIPS Final Score
- 82.8/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Sleep Medicine (Psychiatry & Neurology) Physician) - 82.8/100 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).
Ian Merrill, MD appears in the CMS NPPES registry as a Sleep Medicine (Psychiatry & Neurology) Physician provider holding MD credentials at 1536 N 115TH ST, Seattle, WA, 98133, with a listed phone of (206) 386-4744. NPI 1245350164 was issued on 04/02/2007.
Medicare Part D records for calendar year 2023 show 256 prescription claims written by this provider, covering 49 Medicare beneficiaries and totaling roughly $197K in drug spend, split 5% brand-name and 95% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 82.8/100 for the 2023 performance year (Quality 82.1, Cost 60.7), compared with the national average of 83.1.
Sleep Medicine (Psychiatry & Neurology) Physician is a narrow specialty nationwide, with 376 enrolled providers across 46 states and an average of 1,005 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 | 1245350164 |
|---|---|
| Specialty | Sleep Medicine (Psychiatry & Neurology) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 04/02/2007 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
82.8417
Final Score
Avg: 83.1
82.1476
Quality
60.658
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Ian Merrill, 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.
Swedish Health Services
Seattle, WA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Washington WMC 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 ~34K Washington medical licensees in 2023 - they are NOT specific to Ian Merrill, MD. To verify Ian Merrill, MD's current license status, search the WMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
88
Total board actions, Washington 2023
Across 85 cases
2.59
Actions per 1,000 licensees
Washington statewide rate
probation
Most common action type
31 cases
WMC 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 Washington disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Ian Merrill, MD - brand share 5.0%
Sleep Medicine (Psychiatry & Neurology) Physician average
5% brand-name claims vs 95% generic, on 256 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.
256
Total Claims
$197K
Total Drug Cost
49
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 366
- Total Day Supply
- 10,858
- Brand vs Generic
- 5% brand / 95% generic
- Brand Drug Cost
- $192K
- Generic Drug Cost
- $5K
Patient Demographics
- Average Patient Age
- 71.0 years
- Avg HCC Risk Score
- 1.11
- Gender Split
- 41% female / 59% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ian Merrill, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Gabapentin
Gabapentin
107 claims
- Zolpidem Tartrate 27
Zolpidem Tartrate
27 claims
- Trazodone Hcl 21
Trazodone Hcl
21 claims
- Ropinirole Hcl 19
Ropinirole Hcl
19 claims
- Modafinil 16
Modafinil
16 claims
- Pramipexole Dihydr… 14
Pramipexole Dihydrochloride
14 claims
- Sodium Oxybate 12
Sodium Oxybate
12 claims
| Drug | Claims |
|---|---|
| Gabapentin | 107 |
| Zolpidem Tartrate | 27 |
| Trazodone Hcl | 21 |
| Ropinirole Hcl | 19 |
| Modafinil | 16 |
| Pramipexole Dihydrochloride Pramipexole Di-Hcl | 14 |
| Sodium Oxybate | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Sleep Medicine (Psychiatry & Neurology) Physician in WA →
All providers in Washington →
Compare specialties →
Sleep Medicine (Psychiatry & Neurology) Physician Overview
How Ian Merrill, MD fits within the Sleep Medicine (Psychiatry & Neurology) Physician landscape nationally.
376
Sleep Medicine (Psychiatry & Neurology) Physician Providers in US
46
States with Sleep Medicine (Psychiatry & Neurology) Physician
1,005
Avg Claims per Provider
Ian Merrill, MD's 256 claims are below the specialty average of 1,005.
Nearby Sleep Medicine (Psychiatry & Neurology) Physician Providers in Washington
Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as Merrill.
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 Washington medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Sleep Medicine (Psychiatry & 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 Ian Merrill, MD's specialty? ▼
Ian Merrill, MD specializes in Sleep Medicine (Psychiatry & Neurology) Physician and practices in Seattle, Washington. Credentials: MD.
How much does Ian Merrill, MD prescribe under Medicare Part D? ▼
In 2023, Ian Merrill, MD wrote 256 Medicare Part D claims totaling $197K in drug costs for 49 beneficiaries.
What is Ian Merrill, MD's Medicare quality score? ▼
Ian Merrill, MD has a CMS MIPS Final Score of 82.8/100 (Quality: 82.1, Cost: 60.7). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Ian Merrill, MD located? ▼
Ian Merrill, MD is located at 1536 N 115TH ST, Seattle, WA, 98133. Phone: (206) 386-4744.
What is Ian Merrill, MD's NPI number? ▼
Ian Merrill, MD's National Provider Identifier (NPI) is 1245350164, issued on 04/02/2007.
Does Ian Merrill, MD prescribe more brand-name or generic drugs? ▼
Ian Merrill, MD's prescribing is 5% brand-name and 95% generic drugs by claim count, with $192K in brand drug costs.
How many Sleep Medicine (Psychiatry & Neurology) Physician providers are there in the US? ▼
There are 376 Sleep Medicine (Psychiatry & Neurology) Physician providers across 46 states in the US. The average Sleep Medicine (Psychiatry & Neurology) Physician provider writes 1,005 Medicare Part D claims per year.
What drugs does Ian Merrill, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Ian Merrill, MD's most frequently prescribed drugs include Gabapentin, Zolpidem Tartrate, Trazodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ian Merrill, MD accept Medicare? ▼
Ian Merrill, MD appears in CMS Medicare data with 256 Part D claims and 49 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ian Merrill, MD's credentials? ▼
Ian Merrill, MD's NPI is 1245350164 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
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.