NPI registry status
Active
2026 NPPES data Pediatric Nephrology Physician NPI 1487141255 MD
Verify on CMS → William Rasmussen, MD
Pediatric Nephrology Physician in Dexter, Michigan.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 724 in Pediatric Nephrology 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
71
Medicare Part D claims · 15 beneficiaries · Pediatric Nephrology Physician avg: 97
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
William Rasmussen, MD filed 71 Medicare Part D claims in 2023 as a Pediatric Nephrology Physician in Dexter, Michigan.
- 71
- Part D claims, 2023
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 Rasmussen, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
71 0th percentile higher than 0% 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-eligible specialty (heuristic, not verified)
William Rasmussen, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about William Rasmussen, MD?
Quality data not reportedPrimary specialty
Pediatric Nephrology Physician
Medicare Part D claims
71 27% vs specialty avg
Specialty distribution in Michigan
How Pediatric Nephrology Physician compares to other specialties among Michigan 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 Pediatric Nephrology 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).
William Rasmussen, MD appears in the CMS NPPES registry as a Pediatric Nephrology Physician provider holding MD credentials at 7425 ANN ARBOR ST, Dexter, MI, 48130, with a listed phone of (616) 648-6425. NPI 1487141255 was issued on 04/17/2018.
Medicare Part D records for calendar year 2023 show 71 prescription claims written by this provider, covering 15 Medicare beneficiaries and totaling roughly $13K in drug spend.
Pediatric Nephrology Physician is a narrow specialty nationwide, with 724 enrolled providers across 50 states and an average of 97 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 | 1487141255 |
|---|---|
| Specialty | Pediatric Nephrology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 04/17/2018 |
License & disciplinary context - Michigan MI-BOM 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 ~41K Michigan medical licensees in 2023 - they are NOT specific to William Rasmussen, MD. To verify William Rasmussen, MD's current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases
MI-BOM 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 Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
71
Total Claims
$13K
Total Drug Cost
15
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 151
- Total Day Supply
- 4,478
- Generic Drug Cost
- $519
Patient Demographics
- Average Patient Age
- 67.2 years
- Avg HCC Risk Score
- 2.47
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Omeprazole | 13 |
| Lisinopril | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Pediatric Nephrology Physician Overview
How William Rasmussen, MD fits within the Pediatric Nephrology Physician landscape nationally.
724
Pediatric Nephrology Physician Providers in US
50
States with Pediatric Nephrology Physician
97
Avg Claims per Provider
William Rasmussen, MD's 71 claims are below the specialty average of 97.
Nearby Pediatric Nephrology Physician Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Rasmussen.
Dr. Mary Avendt-Reeber
M.D.
Portage, MI
Dr. Rossana Baracco
MD
Detroit, MI
Dr. Pinhas Geva
MD
Lansing, MI
Manpreet Grewal
Detroit, MI
Dr. Amrish Jain
M.D.
Detroit, MI
Compare Pediatric Nephrology 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 Michigan medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Pediatric Nephrology 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.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Michigan
Frequently Asked Questions
What is William Rasmussen, MD's specialty? ▼
William Rasmussen, MD specializes in Pediatric Nephrology Physician and practices in Dexter, Michigan. Credentials: MD.
How much does William Rasmussen, MD prescribe under Medicare Part D? ▼
In 2023, William Rasmussen, MD wrote 71 Medicare Part D claims totaling $13K in drug costs for 15 beneficiaries.
Where is William Rasmussen, MD located? ▼
William Rasmussen, MD is located at 7425 ANN ARBOR ST, Dexter, MI, 48130. Phone: (616) 648-6425.
What is William Rasmussen, MD's NPI number? ▼
William Rasmussen, MD's National Provider Identifier (NPI) is 1487141255, issued on 04/17/2018.
How many Pediatric Nephrology Physician providers are there in the US? ▼
There are 724 Pediatric Nephrology Physician providers across 50 states in the US. The average Pediatric Nephrology Physician provider writes 97 Medicare Part D claims per year.
What drugs does William Rasmussen, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, William Rasmussen, MD's most frequently prescribed drugs include Omeprazole, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Rasmussen, MD accept Medicare? ▼
William Rasmussen, MD appears in CMS Medicare data with 71 Part D claims and 15 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Rasmussen, MD's credentials? ▼
William Rasmussen, MD's NPI is 1487141255 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.