NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1225015670 MD
Verify on CMS → Mary Nelson, MD
Family Medicine Physician in Cedar Rapids, Iowa.
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
18K
Medicare Part D claims · 713 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
88%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
49.9/100
▼ 33 pts below national avg 83.1 · Below average
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Mary Nelson, MD reported a CMS MIPS final score of 49.9/100 - below the 83.1 national average - and filed 17,597 Medicare Part D claims in 2023.
- 49.9/100
- MIPS score · -33 vs avg
- 18K
- Part D claims, 2023
- 88%
- 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.
Mary Nelson, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
50 4th percentile higher than 4% 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 Mary Nelson, MD 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, Mary Nelson, MD writes more Part D claims than 97% of them and scores higher on MIPS quality than 6% - 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 Mary Nelson, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Mary Nelson, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Mary Nelson, MD?
Below national averagePrimary specialty
Family Medicine Physician
Medicare Part D claims
17,597 5× vs specialty avg
MIPS final score
49.9/100 33.2 pts vs avg
Specialty distribution in Iowa
How Family Medicine Physician compares to other specialties among Iowa providers
Medicare quality performance, MIPS
Mary Nelson, MD's 2023 MIPS final score plotted against the Family Medicine Physician national average
- MIPS Final Score
- 49.9/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Family Medicine Physician) - 49.9/100 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).
Mary Nelson, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at 411 10TH ST SE, Cedar Rapids, IA, 52403, with a listed phone of (319) 365-8616. NPI 1225015670 was issued on 12/28/2005.
Medicare Part D records for calendar year 2023 show 17,597 prescription claims written by this provider, covering 713 Medicare beneficiaries and totaling roughly $1.1 million in drug spend, split 11% brand-name and 88% generic by claim count, with an opioid prescribing rate of 2.7%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 49.9/100 for the 2023 performance year (Quality 100, Cost 33.1), 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 | 1225015670 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 12/28/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
49.9321
Final Score
Avg: 83.1
100
Quality
33.107
Cost
Reporting: Individual
Brand vs generic prescribing mix · Typical
Mary Nelson, MD - brand share 11.0%
Family Medicine Physician average
11% brand-name claims vs 88% generic, on 17,597 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.
17,597
Total Claims
$1.1M
Total Drug Cost
713
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 35,042
- Total Day Supply
- 983,948
- Brand vs Generic
- 11% brand / 88% generic
- Brand Drug Cost
- $770K
- Generic Drug Cost
- $288K
- Opioid Claims
- 469 (2.7% rate)
- Antibiotic Claims
- 663
Patient Demographics
- Average Patient Age
- 75.9 years
- Avg HCC Risk Score
- 1.03
- Gender Split
- 63% female / 37% male
- Age Distribution
- <65: 15, 65-74: 351, 75-84: 217, 85+: 130
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mary Nelson, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
1,080 claims
- Atorvastatin Calcium
Atorvastatin Calcium
837 claims
- Losartan Potassium
Losartan Potassium
781 claims
- Gabapentin
Gabapentin
622 claims
- Omeprazole
Omeprazole
539 claims
- Furosemide
Furosemide
470 claims
- Metoprolol Succinate
Metoprolol Succinate
454 claims
- Atenolol 393
Atenolol
393 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 1,080 |
| Atorvastatin Calcium | 837 |
| Losartan Potassium | 781 |
| Gabapentin | 622 |
| Omeprazole | 539 |
| Furosemide | 470 |
| Metoprolol Succinate | 454 |
| Atenolol | 393 |
| Hydrochlorothiazide | 363 |
| Pantoprazole Sodium | 326 |
* 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 Mary Nelson, 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
Mary Nelson, MD's 17,597 claims are above the specialty average of 3,418.
Nearby Family Medicine Physician Providers in Iowa
Other clinicians with the same primary specialty enrolled in Iowa, drawn from the same CMS NPPES roster as Nelson.
Dr. Jennifer Aanestad
M.D.
Durant, IA
Dr. Amjad Abdelhady
MD
Sioux City, IA
Dr. Afsana Abdullah
D.O.
Bettendorf, IA
Dr. Raja Ali Abdullah
MD
Cedar Falls, IA
Dr. Laura Abels
DO
Ankeny, IA
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 Iowa 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.
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Medical Specialties Explained
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Understanding Medicare Claims Data
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How insurance networks affect your costs
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Frequently Asked Questions
What is Mary Nelson, MD's specialty? ▼
Mary Nelson, MD specializes in Family Medicine Physician and practices in Cedar Rapids, Iowa. Credentials: MD.
How much does Mary Nelson, MD prescribe under Medicare Part D? ▼
In 2023, Mary Nelson, MD wrote 17,597 Medicare Part D claims totaling $1.1M in drug costs for 713 beneficiaries.
What is Mary Nelson, MD's Medicare quality score? ▼
Mary Nelson, MD has a CMS MIPS Final Score of 49.9/100 (Quality: 100, Cost: 33.1). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Mary Nelson, MD located? ▼
Mary Nelson, MD is located at 411 10TH ST SE, Cedar Rapids, IA, 52403. Phone: (319) 365-8616.
What is Mary Nelson, MD's NPI number? ▼
Mary Nelson, MD's National Provider Identifier (NPI) is 1225015670, issued on 12/28/2005.
Does Mary Nelson, MD prescribe more brand-name or generic drugs? ▼
Mary Nelson, MD's prescribing is 11% brand-name and 88% generic drugs by claim count, with $770K in brand drug costs.
Does Mary Nelson, MD prescribe opioids? ▼
Yes, Mary Nelson, MD had 469 opioid claims in 2023 with an opioid prescribing rate of 2.7%.
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 Mary Nelson, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mary Nelson, MD's most frequently prescribed drugs include Levothyroxine Sodium, Atorvastatin Calcium, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mary Nelson, MD accept Medicare? ▼
Mary Nelson, MD appears in CMS Medicare data with 17,597 Part D claims and 713 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mary Nelson, MD's credentials? ▼
Mary Nelson, MD's NPI is 1225015670 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.