NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1376652990 MD
Verify on CMS → Michelle Williamson, MD
Family Medicine Physician in Appleton, Wisconsin.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 150,125 in Family Medicine 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
6K
Medicare Part D claims · 459 beneficiaries · Family Medicine Physician avg: 4K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Michelle Williamson, MD filed 5,698 Medicare Part D claims in 2024 as a Family Medicine Physician in Appleton, Wisconsin, prescribing 91% generic.
- 6K
- Part D claims, 2024
- 91%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥94th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Michelle Williamson, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1376652990), first enumerated 08/29/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 5,698 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Williamson with other Family Medicine Physician providers
Same primary specialty, same federal CMS NPPES roster.
All 103 Family Medicine Physician providers in Appleton, WI →
Also enrolled in Wisconsin
- Dr. Ghudran Abdulal, MD New Berlin, WI
- Dr. Vanessa Abejuela-Matt, D.O. Mount Pleasant, WI
- Dr. Benjamin Abeyta, M.D. Wauwatosa, WI
- Dr. Emily Abeyta, MD Waukesha, WI
- Dr. Islam Abo Al Nadie, MD Milwaukee, WI
- Dr. Jeanette Abraham, MD Weston, WI
Other specialties in Appleton: Physical Therapist (197) · Professional Counselor (171) · Family Nurse Practitioner (138) · Pharmacist (130)
CMS NPPES provider registry desk
NPI 1376652990 · Family Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1376652990
- ENUM-LEGACY 2006
- TAX-MEGA 150K Family Medicine
- RX-MID 5,698
- BOOK-LIGHT 3,629 in Wisconsin
- PHOTO-ENUM Ngoc Pham, M.D. · 2006
Michelle Williamson, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
5,698 ≥ 94th percentile 94% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Michelle Williamson, 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 Michelle Williamson, MD?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
5,698 62% vs specialty avg
Specialty distribution in Wisconsin
How Family Medicine Physician compares to other specialties among Wisconsin 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 Family Medicine 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).
Practice Address
Provider Details
| NPI | 1376652990 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 08/29/2006 |
Hospital and facility affiliations
Facilities where Michelle Williamson, 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.
Primary Care Associates OF Appleton, Ltd
Appleton, WI
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 · Generic-heavy
Michelle Williamson, MD - brand share 9.0%
Family Medicine Physician average
9% brand-name claims vs 91% generic, on 5,698 2024 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 2024.
5,698
Total Claims
$450K
Total Drug Cost
459
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 13,578.367
- Total Day Supply
- 395,699
- Brand vs Generic
- 9% brand / 91% generic
- Brand Drug Cost
- $373K
- Generic Drug Cost
- $75K
- Opioid Claims
- 19 (0.3% rate)
- Antibiotic Claims
- 100
Patient Demographics
- Average Patient Age
- 73.2 years
- Avg HCC Risk Score
- 1.01
- Gender Split
- 84% female / 16% male
- Age Distribution
- <65: 27, 65-74: 246, 75-84: 138, 85+: 48
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Michelle Williamson, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
466 claims
- Levothyroxine Sodium
Levothyroxine Sodium
271 claims
- Lisinopril
Lisinopril
267 claims
- Hydrochlorothiazide
Hydrochlorothiazide
257 claims
- Alendronate Sodium
Alendronate Sodium
229 claims
- Omeprazole 178
Omeprazole
178 claims
- Sertraline Hcl 168
Sertraline Hcl
168 claims
- Trazodone Hcl 165
Trazodone Hcl
165 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 466 |
| Levothyroxine Sodium | 271 |
| Lisinopril | 267 |
| Hydrochlorothiazide | 257 |
| Alendronate Sodium | 229 |
| Omeprazole | 178 |
| Sertraline Hcl | 168 |
| Trazodone Hcl | 165 |
| Losartan Potassium | 162 |
| Metformin Hcl Er Metformin Hcl | 154 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Michelle Williamson, MD fits within the Family Medicine Physician landscape nationally.
150,125
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,519
Avg Claims per Provider
Michelle Williamson, MD's 5,698 claims are above the specialty average of 3,519.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Williamson, both outside Wisconsin so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Williamson.
One of 3,629 Family Medicine Physician providers enrolled in Wisconsin, 11 are shown on this page.
Dr. Sarada Abraham
M.D.
Oconomowoc, WI
Dr. Kirsten Abramson
MD
Madison, WI
Alexandra Adams
MD PHD
Madison, WI
David Adams
Madison, WI
Dr. Reginald Adams
D.O.
Racine, WI
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Michelle Williamson, MD's specialty? ▼
Michelle Williamson, MD specializes in Family Medicine Physician and practices in Appleton, Wisconsin. Credentials: MD.
How much does Michelle Williamson, MD prescribe under Medicare Part D? ▼
In 2024, Michelle Williamson, MD wrote 5,698 Medicare Part D claims totaling $450K in drug costs for 459 beneficiaries.
Where is Michelle Williamson, MD located? ▼
Michelle Williamson, MD is located at 3916 N INTERTECH CT, Appleton, WI, 54913. Phone: (920) 996-1000.
What is Michelle Williamson, MD's NPI number? ▼
Michelle Williamson, MD's National Provider Identifier (NPI) is 1376652990, issued on 08/29/2006.
Does Michelle Williamson, MD prescribe more brand-name or generic drugs? ▼
Michelle Williamson, MD's prescribing is 9% brand-name and 91% generic drugs by claim count, with $373K in brand drug costs.
Does Michelle Williamson, MD prescribe opioids? ▼
Yes, Michelle Williamson, MD had 19 opioid claims in 2024 with an opioid prescribing rate of 0.3%.
How many Family Medicine Physician providers are there in the US? ▼
There are 150,125 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,519 Medicare Part D claims per year.
What drugs does Michelle Williamson, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Michelle Williamson, MD's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michelle Williamson, MD accept Medicare? ▼
Michelle Williamson, MD appears in CMS Medicare data with 5,698 Part D claims and 459 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michelle Williamson, MD's credentials? ▼
Michelle Williamson, MD's NPI is 1376652990 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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.