NPI registry status
Active
2026 NPPES data Specialist NPI 1265491849 MD
Verify on CMS → Donald Johnson, MD
Specialist 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 69,608 in Specialist, 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
202
Medicare Part D claims · 87 beneficiaries · Specialist avg: 1K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
99.4/100
▲ 16 pts above national avg 83.1 · Exceptional
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Donald Johnson, MD reported a CMS MIPS final score of 99.4/100 - above the 83.1 national average - and filed 202 Medicare Part D claims in 2023.
- 99.4/100
- MIPS score · +16 vs avg
- 202
- Part D claims, 2023
- 87%
- generic prescribing
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.
Donald Johnson, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
99 Top 9% higher than 91% 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 Donald Johnson, MD sits
This provider among specialist peers
Across the 4,869 specialist providers who report both Medicare Part D prescribing and a MIPS quality score, Donald Johnson, MD writes more Part D claims than 22% of them and scores higher on MIPS quality than 91% - placing this provider in the lower-volume, high-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 specialist peer from a representative sample of 60; the gold marker is Donald Johnson, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Donald Johnson, MD?
High performer (top quartile)Primary specialty
Specialist
Medicare Part D claims
202 86% vs specialty avg
MIPS final score
99.4/100 16.3 pts vs avg
Specialty distribution in Iowa
How Specialist compares to other specialties among Iowa providers
Medicare quality performance, MIPS
Donald Johnson, MD's 2023 MIPS final score plotted against the Specialist national average
- MIPS Final Score
- 99.4/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Specialist) - 99.4/100 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).
Donald Johnson, MD appears in the CMS NPPES registry as a Specialist provider holding MD credentials at 1815 1ST AVE SE, Cedar Rapids, IA, 52402, with a listed phone of (319) 363-0474. NPI 1265491849 was issued on 03/21/2006.
Medicare Part D records for calendar year 2023 show 202 prescription claims written by this provider, covering 87 Medicare beneficiaries and totaling roughly $138K in drug spend, split 13% brand-name and 87% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 99.4/100 for the 2023 performance year (Quality 100, Cost 99.8), compared with the national average of 83.1.
Specialist is a high-volume specialty nationwide, with 69,608 enrolled providers across 55 states and an average of 1,474 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 | 1265491849 |
|---|---|
| Specialty | Specialist |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 03/21/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
99.4278
Final Score
Avg: 83.1
100
Quality
99.7592
Cost
98
Promoting Interoperability
Reporting: Group practice
Brand vs generic prescribing mix · Typical
Donald Johnson, MD - brand share 13.0%
Specialist average
13% brand-name claims vs 87% generic, on 202 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.
202
Total Claims
$138K
Total Drug Cost
87
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 232
- Total Day Supply
- 6,446
- Brand vs Generic
- 13% brand / 87% generic
- Brand Drug Cost
- $134K
- Generic Drug Cost
- $4K
- Antibiotic Claims
- 11
Patient Demographics
- Average Patient Age
- 73.9 years
- Avg HCC Risk Score
- 1.09
- Gender Split
- 64% female / 36% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Donald Johnson, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Triamcinolone Acet…
Triamcinolone Acetonide
76 claims
- Clobetasol Propion… 13
Clobetasol Propionate
13 claims
- Hydrocortisone 11
Hydrocortisone
11 claims
- Otezla 11
Otezla
11 claims
- Taltz Autoinjector 11
Taltz Autoinjector
11 claims
| Drug | Claims |
|---|---|
| Triamcinolone Acetonide | 76 |
| Clobetasol Propionate | 13 |
| Hydrocortisone | 11 |
| Otezla Apremilast | 11 |
| Taltz Autoinjector Ixekizumab | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Specialist Overview
How Donald Johnson, MD fits within the Specialist landscape nationally.
69,608
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider
Donald Johnson, MD's 202 claims are below the specialty average of 1,474.
Nearby Specialist Providers in Iowa
Other clinicians with the same primary specialty enrolled in Iowa, drawn from the same CMS NPPES roster as Johnson.
Dr. Janet Acarregui
MD
Hiawatha, IA
Dr. Kristina Adkins
M.D.
Dubuque, IA
Dr. Richard Aerts
M.D.
Hiawatha, IA
Dr. Ferhaan Ahmad
M.D.
Iowa City, IA
Rebecca Ahrendsen
Hinton, IA
Compare Specialist 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 Specialist 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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Frequently Asked Questions
What is Donald Johnson, MD's specialty? ▼
Donald Johnson, MD specializes in Specialist and practices in Cedar Rapids, Iowa. Credentials: MD.
How much does Donald Johnson, MD prescribe under Medicare Part D? ▼
In 2023, Donald Johnson, MD wrote 202 Medicare Part D claims totaling $138K in drug costs for 87 beneficiaries.
What is Donald Johnson, MD's Medicare quality score? ▼
Donald Johnson, MD has a CMS MIPS Final Score of 99.4/100 (Quality: 100, Cost: 99.8). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Donald Johnson, MD located? ▼
Donald Johnson, MD is located at 1815 1ST AVE SE, Cedar Rapids, IA, 52402. Phone: (319) 363-0474.
What is Donald Johnson, MD's NPI number? ▼
Donald Johnson, MD's National Provider Identifier (NPI) is 1265491849, issued on 03/21/2006.
Does Donald Johnson, MD prescribe more brand-name or generic drugs? ▼
Donald Johnson, MD's prescribing is 13% brand-name and 87% generic drugs by claim count, with $134K in brand drug costs.
How many Specialist providers are there in the US? ▼
There are 69,608 Specialist providers across 55 states in the US. The average Specialist provider writes 1,474 Medicare Part D claims per year.
What drugs does Donald Johnson, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Donald Johnson, MD's most frequently prescribed drugs include Triamcinolone Acetonide, Clobetasol Propionate, Hydrocortisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Donald Johnson, MD accept Medicare? ▼
Donald Johnson, MD appears in CMS Medicare data with 202 Part D claims and 87 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Donald Johnson, MD's credentials? ▼
Donald Johnson, MD's NPI is 1265491849 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
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.