NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1891354916 MD
Verify on CMS → Diane Bussan, MD
Family Medicine Physician in Cross Plains, 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 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 · 422 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
77.4/100
▼ 6 pts below national avg 83.5 · Above neutral
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Diane Bussan, MD reported a CMS MIPS final score of 77.4/100 - below the 83.5 national average - and filed 6,487 Medicare Part D claims in 2023.
- 77.4/100
- MIPS score · -6 vs avg
- 6K
- Part D claims, 2023
- 87%
- 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.
CMS NPPES provider registry desk
NPI 1891354916 · Family Medicine Physician
NPI-10 · ENUM-RECENT · TAX-MEGA · MIPS-BELOW · RX-MID · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1891354916
- ENUM-RECENT 2019
- TAX-MEGA 148K Family Medicine
- MIPS-BELOW 77.4/100
- RX-MID 6,487
- BOOK-LIGHT 3,587 in Wisconsin
- PHOTO-FINISH Curtis Foy · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Bussan · this pr…
Bussan · this provider
77.4 MIPS pts
- Curtis Foy · hig…
Curtis Foy
77.4 MIPS pts
- Kelly Brooks · n…
Kelly Brooks
77.4 MIPS pts
- Hallum Dickens ·…
Hallum Dickens
77.4 MIPS pts
- Margaretta Gerge…
Margaretta Gergen
77.4 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Diane Bussan, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
77 ≥ 20th percentile 20% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured 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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Diane Bussan, MD sits
This provider among family medicine physician peers
Across the 21,266 family medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Diane Bussan, MD writes more Part D claims than 76% of them and scores higher on MIPS quality than 22% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one family medicine physician peer from a representative sample of 60; the gold marker is Diane Bussan, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Diane Bussan, 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 Diane Bussan, MD?
Below national averagePrimary specialty
Family Medicine Physician
Medicare Part D claims
6,487 90% vs specialty avg
MIPS final score
77.4/100 6.1 pts vs avg
Specialty distribution in Wisconsin
How Family Medicine Physician compares to other specialties among Wisconsin providers
Medicare quality performance, MIPS
Diane Bussan, MD's 2023 MIPS final score plotted against the Family Medicine Physician national average
- MIPS Final Score
- 77.4/100
- vs 83.5 national avg · 2023 performance year
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 | 1891354916 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 06/12/2019 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
77.4384
Final Score
Measured-score avg: 83.5
81.8371
Quality
62.1241
Cost
77
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Diane Bussan, 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.
University OF Wisconsin Medical Foundation Inc
Cross Plains, 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 · Typical
Diane Bussan, MD - brand share 13.0%
Family Medicine Physician average
13% brand-name claims vs 87% generic, on 6,487 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.
6,487
Total Claims
$478K
Total Drug Cost
422
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 12,561
- Total Day Supply
- 354,632
- Brand vs Generic
- 13% brand / 87% generic
- Brand Drug Cost
- $374K
- Generic Drug Cost
- $101K
- Opioid Claims
- 245 (3.8% rate)
- Antibiotic Claims
- 89
Patient Demographics
- Average Patient Age
- 72.4 years
- Avg HCC Risk Score
- 0.94
- Gender Split
- 56% female / 44% male
- Age Distribution
- <65: 34, 65-74: 225, 75-84: 127, 85+: 36
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Diane Bussan, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
385 claims
- Amlodipine Besylate
Amlodipine Besylate
262 claims
- Lisinopril
Lisinopril
235 claims
- Omeprazole
Omeprazole
230 claims
- Simvastatin
Simvastatin
220 claims
- Hydrochlorothiazide
Hydrochlorothiazide
211 claims
- Losartan Potassium
Losartan Potassium
195 claims
- Levothyroxine Sodium
Levothyroxine Sodium
181 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 385 |
| Amlodipine Besylate | 262 |
| Lisinopril | 235 |
| Omeprazole | 230 |
| Simvastatin | 220 |
| Hydrochlorothiazide | 211 |
| Losartan Potassium | 195 |
| Levothyroxine Sodium | 181 |
| Metoprolol Succinate | 146 |
| Eliquis Apixaban | 137 |
* 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 Diane Bussan, MD 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
Diane Bussan, MD's 6,487 claims are above the specialty average of 3,418.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Bussan, both outside Wisconsin so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (77.4 here).
Same NPPES enumeration year (2019)
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 Bussan.
One of 3,587 Family Medicine Physician providers enrolled in Wisconsin, 5 are shown here.
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
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Diane Bussan, MD's specialty? ▼
Diane Bussan, MD specializes in Family Medicine Physician and practices in Cross Plains, Wisconsin. Credentials: MD.
How much does Diane Bussan, MD prescribe under Medicare Part D? ▼
In 2023, Diane Bussan, MD wrote 6,487 Medicare Part D claims totaling $478K in drug costs for 422 beneficiaries.
What is Diane Bussan, MD's Medicare quality score? ▼
Diane Bussan, MD has a CMS MIPS Final Score of 77.4/100 (Quality: 81.8, Cost: 62.1). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Diane Bussan, MD located? ▼
Diane Bussan, MD is located at 2418 BREWERY RD, Cross Plains, WI, 53528. Phone: (608) 798-3344.
What is Diane Bussan, MD's NPI number? ▼
Diane Bussan, MD's National Provider Identifier (NPI) is 1891354916, issued on 06/12/2019.
Does Diane Bussan, MD prescribe more brand-name or generic drugs? ▼
Diane Bussan, MD's prescribing is 13% brand-name and 87% generic drugs by claim count, with $374K in brand drug costs.
Does Diane Bussan, MD prescribe opioids? ▼
Yes, Diane Bussan, MD had 245 opioid claims in 2023 with an opioid prescribing rate of 3.8%.
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 Diane Bussan, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Diane Bussan, MD's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Diane Bussan, MD accept Medicare? ▼
Diane Bussan, MD appears in CMS Medicare data with 6,487 Part D claims and 422 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Diane Bussan, MD's credentials? ▼
Diane Bussan, MD's NPI is 1891354916 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
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.