NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1124034566 M.D.
Verify on CMS → Sherrill Fox, M.D.
Family Medicine Physician in Casper, Wyoming.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 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 · 389 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
81%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
58.5/100
▼ 25 pts below national avg 83.1 · Mid-tier
Industry payments
$614.77
23 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Sherrill Fox, M.D. reported a CMS MIPS final score of 58.5/100 - below the 83.1 national average - and filed 6,369 Medicare Part D claims in 2023.
- 58.5/100
- MIPS score · -25 vs avg
- 6K
- Part D claims, 2023
- 81%
- 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.
Sherrill Fox, 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
59 5th percentile higher than 5% 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 Sherrill Fox, M.D. sits
This provider among family medicine physician peers
Across the 22,040 family medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Sherrill Fox, M.D. writes more Part D claims than 74% of them and scores higher on MIPS quality than 7% - placing this provider in the high-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 family medicine physician peer from a representative sample of 60; the gold marker is Sherrill Fox, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Sherrill Fox, M.D. 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 Sherrill Fox, M.D.?
Below national averagePrimary specialty
Family Medicine Physician
Medicare Part D claims
6,369 86% vs specialty avg
MIPS final score
58.5/100 24.6 pts vs avg
Specialty distribution in Wyoming
How Family Medicine Physician compares to other specialties among Wyoming providers
Medicare quality performance, MIPS
Sherrill Fox, M.D.'s 2023 MIPS final score plotted against the Family Medicine Physician national average
- MIPS Final Score
- 58.5/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Family Medicine Physician) - 58.5/100 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).
Sherrill Fox, M.D. appears in the CMS NPPES registry as a Family Medicine Physician provider holding M.D. credentials at 6500 E 2ND ST, Casper, WY, 82609, with a listed phone of (307) 577-5100. NPI 1124034566 was issued on 07/31/2006.
Medicare Part D records for calendar year 2023 show 6,369 prescription claims written by this provider, covering 389 Medicare beneficiaries and totaling roughly $1.0 million in drug spend, split 17% brand-name and 81% generic by claim count, with an opioid prescribing rate of 2.2%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 58.5/100 for the 2023 performance year (Quality 47.8, Cost 57.4), compared with the national average of 83.1.
Family Medicine Physician is a high-volume specialty nationwide, with 147,760 enrolled providers across 56 states and an average of 3,418 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 | 1124034566 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 07/31/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
58.5048
Final Score
Avg: 83.1
47.7793
Quality
57.4204
Cost
Reporting: Group practice
Hospital and facility affiliations
Facilities where Sherrill Fox, 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.
Summit Memorial Medical Group LLC
Casper, WY
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Sherrill Fox, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$615
Largest payer
AstraZeneca Pharmaceuticals LP
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Typical
Sherrill Fox, M.D. - brand share 17.0%
Family Medicine Physician average
17% brand-name claims vs 81% generic, on 6,369 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.
6,369
Total Claims
$1.0M
Total Drug Cost
389
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 14,568
- Total Day Supply
- 426,642
- Brand vs Generic
- 17% brand / 81% generic
- Brand Drug Cost
- $869K
- Generic Drug Cost
- $148K
- Opioid Claims
- 143 (2.2% rate)
- Antibiotic Claims
- 71
Patient Demographics
- Average Patient Age
- 73.1 years
- Avg HCC Risk Score
- 0.88
- Gender Split
- 78% female / 22% male
- Age Distribution
- <65: 31, 65-74: 202, 75-84: 115, 85+: 41
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Sherrill Fox, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
459 claims
- Losartan Potassium
Losartan Potassium
242 claims
- Atorvastatin Calcium
Atorvastatin Calcium
220 claims
- Pantoprazole Sodium
Pantoprazole Sodium
190 claims
- Gabapentin 157
Gabapentin
157 claims
- Omeprazole 151
Omeprazole
151 claims
- Lisinopril 148
Lisinopril
148 claims
- Simvastatin 143
Simvastatin
143 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 459 |
| Losartan Potassium | 242 |
| Atorvastatin Calcium | 220 |
| Pantoprazole Sodium | 190 |
| Gabapentin | 157 |
| Omeprazole | 151 |
| Lisinopril | 148 |
| Simvastatin | 143 |
| Amlodipine Besylate | 131 |
| Rosuvastatin Calcium | 131 |
* 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 Sherrill Fox, M.D. fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Sherrill Fox, M.D.'s 6,369 claims are above the specialty average of 3,418.
Nearby Family Medicine Physician Providers in Wyoming
Other clinicians with the same primary specialty enrolled in Wyoming, drawn from the same CMS NPPES roster as Fox.
Dr. Michael Adams
M.D.
Evanston, WY
Dr. Raymond Adams
M.D.
Fort Washakie, WY
Dr. Ted Akers
MD
Newcastle, WY
Dr. Patrick Allen
D.O.
Cody, WY
Dr. Berit Amundson
MD
Jackson, WY
Compare Family Medicine 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 Wyoming medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Family Medicine 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
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
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 Wyoming
Frequently Asked Questions
What is Sherrill Fox, M.D.'s specialty? ▼
Sherrill Fox, M.D. specializes in Family Medicine Physician and practices in Casper, Wyoming. Credentials: M.D..
How much does Sherrill Fox, M.D. prescribe under Medicare Part D? ▼
In 2023, Sherrill Fox, M.D. wrote 6,369 Medicare Part D claims totaling $1.0M in drug costs for 389 beneficiaries.
What is Sherrill Fox, M.D.'s Medicare quality score? ▼
Sherrill Fox, M.D. has a CMS MIPS Final Score of 58.5/100 (Quality: 47.8, Cost: 57.4). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Sherrill Fox, M.D. located? ▼
Sherrill Fox, M.D. is located at 6500 E 2ND ST, Casper, WY, 82609. Phone: (307) 577-5100.
What is Sherrill Fox, M.D.'s NPI number? ▼
Sherrill Fox, M.D.'s National Provider Identifier (NPI) is 1124034566, issued on 07/31/2006.
Does Sherrill Fox, M.D. prescribe more brand-name or generic drugs? ▼
Sherrill Fox, M.D.'s prescribing is 17% brand-name and 81% generic drugs by claim count, with $869K in brand drug costs.
Does Sherrill Fox, M.D. prescribe opioids? ▼
Yes, Sherrill Fox, M.D. had 143 opioid claims in 2023 with an opioid prescribing rate of 2.2%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does Sherrill Fox, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Sherrill Fox, M.D.'s most frequently prescribed drugs include Levothyroxine Sodium, Losartan Potassium, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Sherrill Fox, M.D. accept Medicare? ▼
Sherrill Fox, M.D. appears in CMS Medicare data with 6,369 Part D claims and 389 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Sherrill Fox, M.D.'s credentials? ▼
Sherrill Fox, M.D.'s NPI is 1124034566 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
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.