NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1205806460 M.D.
Verify on CMS → James Nielsen, M.D.
Emergency Medicine Physician in Mitchell, South Dakota.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 64,463 in Emergency 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
1K
Medicare Part D claims · 112 beneficiaries · Emergency Medicine Physician avg: 352
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
James Nielsen, M.D. filed 1,283 Medicare Part D claims in 2023 as a Emergency Medicine Physician in Mitchell, South Dakota.
- 1K
- 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.
James Nielsen, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,283 Top 22% higher than 78% 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)
James Nielsen, M.D. 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 James Nielsen, M.D.?
Quality data not reportedPrimary specialty
Emergency Medicine Physician
Medicare Part D claims
1,283 264% vs specialty avg
Specialty distribution in South Dakota
How Emergency Medicine Physician compares to other specialties among South Dakota 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 Emergency 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).
James Nielsen, M.D. appears in the CMS NPPES registry as an Emergency Medicine Physician provider holding M.D. credentials at 525 N FOSTER ST, Mitchell, SD, 57301, with a listed phone of (605) 995-2000. NPI 1205806460 was issued on 01/23/2006.
Medicare Part D records for calendar year 2023 show 1,283 prescription claims written by this provider, covering 112 Medicare beneficiaries and totaling roughly $86K in drug spend, with an opioid prescribing rate of 1.0%.
Emergency Medicine Physician is a high-volume specialty nationwide, with 64,463 enrolled providers across 56 states and an average of 352 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 | 1205806460 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 01/23/2006 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,283
Total Claims
$86K
Total Drug Cost
112
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,218
- Total Day Supply
- 64,376
- Generic Drug Cost
- $24K
- Opioid Claims
- 13 (1.0% rate)
- Antibiotic Claims
- 17
Patient Demographics
- Average Patient Age
- 78.2 years
- Avg HCC Risk Score
- 1.44
- Gender Split
- 40% female / 60% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What James Nielsen, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
94 claims
- Lisinopril
Lisinopril
54 claims
- Atorvastatin Calcium
Atorvastatin Calcium
52 claims
- Metformin Hcl
Metformin Hcl
43 claims
- Pantoprazole Sodium
Pantoprazole Sodium
41 claims
- Furosemide
Furosemide
40 claims
- Eliquis 35
Eliquis
35 claims
- Potassium Chloride 31
Potassium Chloride
31 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 94 |
| Lisinopril | 54 |
| Atorvastatin Calcium | 52 |
| Metformin Hcl | 43 |
| Pantoprazole Sodium | 41 |
| Furosemide | 40 |
| Eliquis Apixaban | 35 |
| Potassium Chloride | 31 |
| Simvastatin | 31 |
| Clopidogrel Clopidogrel Bisulfate | 29 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Emergency Medicine Physician Overview
How James Nielsen, M.D. fits within the Emergency Medicine Physician landscape nationally.
64,463
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider
James Nielsen, M.D.'s 1,283 claims are above the specialty average of 352.
Nearby Emergency Medicine Physician Providers in South Dakota
Other clinicians with the same primary specialty enrolled in South Dakota, drawn from the same CMS NPPES roster as Nielsen.
Dr. Benjamin Aaker
MD
Yankton, SD
Dr. Joseph Alex
MD
Sioux Falls, SD
Dr. Reid Allred
M.D.
Madison, SD
Dr. Jeffrey Anderson
MD
Rapid City, SD
Dr. Kevin Aston
DO
Aberdeen, SD
Compare Emergency 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 South Dakota medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Emergency 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
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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
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Explore South Dakota
Frequently Asked Questions
What is James Nielsen, M.D.'s specialty? ▼
James Nielsen, M.D. specializes in Emergency Medicine Physician and practices in Mitchell, South Dakota. Credentials: M.D..
How much does James Nielsen, M.D. prescribe under Medicare Part D? ▼
In 2023, James Nielsen, M.D. wrote 1,283 Medicare Part D claims totaling $86K in drug costs for 112 beneficiaries.
Where is James Nielsen, M.D. located? ▼
James Nielsen, M.D. is located at 525 N FOSTER ST, Mitchell, SD, 57301. Phone: (605) 995-2000.
What is James Nielsen, M.D.'s NPI number? ▼
James Nielsen, M.D.'s National Provider Identifier (NPI) is 1205806460, issued on 01/23/2006.
Does James Nielsen, M.D. prescribe opioids? ▼
Yes, James Nielsen, M.D. had 13 opioid claims in 2023 with an opioid prescribing rate of 1.0%.
How many Emergency Medicine Physician providers are there in the US? ▼
There are 64,463 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does James Nielsen, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, James Nielsen, M.D.'s most frequently prescribed drugs include Levothyroxine Sodium, Lisinopril, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does James Nielsen, M.D. accept Medicare? ▼
James Nielsen, M.D. appears in CMS Medicare data with 1,283 Part D claims and 112 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify James Nielsen, M.D.'s credentials? ▼
James Nielsen, M.D.'s NPI is 1205806460 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.
- 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.