NPI registry status
Active
2026 NPPES data Specialist NPI 1003899816 MD
Verify on CMS → Donn Davis, MD
Specialist in Prescott, Arizona.
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
157
Medicare Part D claims · 63 beneficiaries · Specialist avg: 1K
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
82.6/100
▼ 1 pts below national avg 83.1 · Above neutral
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Donn Davis, MD reported a CMS MIPS final score of 82.6/100 - below the 83.1 national average - and filed 157 Medicare Part D claims in 2023.
- 82.6/100
- MIPS score · -1 vs avg
- 157
- Part D claims, 2023
- 90%
- 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.
Donn Davis, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
83 39th percentile higher than 39% 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 Donn Davis, 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, Donn Davis, MD writes more Part D claims than 18% of them and scores higher on MIPS quality than 53% - 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 Donn Davis, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Donn Davis, MD?
Near national averagePrimary specialty
Specialist
Medicare Part D claims
157 89% vs specialty avg
MIPS final score
82.6/100 0.5 pts vs avg
Specialty distribution in Arizona
How Specialist compares to other specialties among Arizona providers
Medicare quality performance, MIPS
Donn Davis, MD's 2023 MIPS final score plotted against the Specialist national average
- MIPS Final Score
- 82.6/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Specialist) - 82.6/100 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).
Donn Davis, MD appears in the CMS NPPES registry as a Specialist provider holding MD credentials at 1100 GAIL GARDNER WAY, Prescott, AZ, 86305, with a listed phone of (928) 776-1040. NPI 1003899816 was issued on 11/25/2005.
Medicare Part D records for calendar year 2023 show 157 prescription claims written by this provider, covering 63 Medicare beneficiaries and totaling roughly $1K in drug spend, split 10% brand-name and 90% generic by claim count, with an opioid prescribing rate of 20.4%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 82.6/100 for the 2023 performance year (Quality 95.1), 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 | 1003899816 |
|---|---|
| Specialty | Specialist |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 11/25/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
82.5913
Final Score
Avg: 83.1
95.0752
Quality
51
Promoting Interoperability
Reporting: Individual
Hospital and facility affiliations
Facilities where Donn Davis, 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.
Arizona Oncology Associates PC
Prescott, AZ
City OF Hope Medical Group OF Arizona LLC
Prescott, AZ
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
Donn Davis, MD - brand share 10.0%
Specialist average
10% brand-name claims vs 90% generic, on 157 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.
157
Total Claims
$1K
Total Drug Cost
63
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 190
- Total Day Supply
- 2,956
- Brand vs Generic
- 10% brand / 90% generic
- Brand Drug Cost
- $312
- Generic Drug Cost
- $1K
- Opioid Claims
- 32 (20.4% rate)
- Antibiotic Claims
- 19
Patient Demographics
- Average Patient Age
- 73.7 years
- Avg HCC Risk Score
- 1.70
- Gender Split
- 21% female / 79% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Donn Davis, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Tamsulosin Hcl
Tamsulosin Hcl
37 claims
- Hydromorphone Hcl
Hydromorphone Hcl
18 claims
- Ciprofloxacin Hcl
Ciprofloxacin Hcl
17 claims
- Diazepam
Diazepam
16 claims
- Prochlorperazine M… 14
Prochlorperazine Maleate
14 claims
- Hydrocodone-Acetam… 11
Hydrocodone-Acetaminophen
11 claims
| Drug | Claims |
|---|---|
| Tamsulosin Hcl | 37 |
| Hydromorphone Hcl | 18 |
| Ciprofloxacin Hcl | 17 |
| Diazepam | 16 |
| Prochlorperazine Maleate | 14 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Specialist Overview
How Donn Davis, MD fits within the Specialist landscape nationally.
69,608
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider
Donn Davis, MD's 157 claims are below the specialty average of 1,474.
Nearby Specialist Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Davis.
Dr. Michael Abeshaus
MD
Flagstaff, AZ
Dr. Howard Abrams
M.D.
Phoenix, AZ
Rashael Achinivu
Peoria, AZ
Dr. Claire Acuff
PTA
Avondale, AZ
Deborah Adams-Courtland
Prescott, AZ
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 Arizona 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.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
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How insurance networks affect your costs
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Frequently Asked Questions
What is Donn Davis, MD's specialty? ▼
Donn Davis, MD specializes in Specialist and practices in Prescott, Arizona. Credentials: MD.
How much does Donn Davis, MD prescribe under Medicare Part D? ▼
In 2023, Donn Davis, MD wrote 157 Medicare Part D claims totaling $1K in drug costs for 63 beneficiaries.
What is Donn Davis, MD's Medicare quality score? ▼
Donn Davis, MD has a CMS MIPS Final Score of 82.6/100 (Quality: 95.1). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Donn Davis, MD located? ▼
Donn Davis, MD is located at 1100 GAIL GARDNER WAY, Prescott, AZ, 86305. Phone: (928) 776-1040.
What is Donn Davis, MD's NPI number? ▼
Donn Davis, MD's National Provider Identifier (NPI) is 1003899816, issued on 11/25/2005.
Does Donn Davis, MD prescribe more brand-name or generic drugs? ▼
Donn Davis, MD's prescribing is 10% brand-name and 90% generic drugs by claim count, with $312 in brand drug costs.
Does Donn Davis, MD prescribe opioids? ▼
Yes, Donn Davis, MD had 32 opioid claims in 2023 with an opioid prescribing rate of 20.4%.
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 Donn Davis, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Donn Davis, MD's most frequently prescribed drugs include Tamsulosin Hcl, Hydromorphone Hcl, Ciprofloxacin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Donn Davis, MD accept Medicare? ▼
Donn Davis, MD appears in CMS Medicare data with 157 Part D claims and 63 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Donn Davis, MD's credentials? ▼
Donn Davis, MD's NPI is 1003899816 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.