NPI registry status
Active
2026 NPPES data Hematology (Internal Medicine) Physician NPI 1871538421 M.D.
Verify on CMS → Willis Navarro, M.D.
Hematology (Internal Medicine) Physician in Tucson, 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 1,436 in Hematology (Internal 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
57
Medicare Part D claims · Hematology (Internal Medicine) Physician avg: 693
Generic prescribing
56%
generic claims · 44% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
81.7/100
▼ 1 pts below national avg 83.1 · Above neutral
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
Willis Navarro, M.D. reported a CMS MIPS final score of 81.7/100 - below the 83.1 national average - and filed 57 Medicare Part D claims in 2023.
- 81.7/100
- MIPS score · -1 vs avg
- 57
- Part D claims, 2023
- 56%
- 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.
Willis Navarro, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
82 36th percentile higher than 36% 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 Willis Navarro, M.D. sits
This provider among hematology (internal medicine) physician peers
Across the 570 hematology (internal medicine) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Willis Navarro, M.D. writes more Part D claims than 8% of them and scores higher on MIPS quality than 46% - placing this provider in the lower-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 hematology (internal medicine) physician peer from a representative sample of 60; the gold marker is Willis Navarro, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Willis Navarro, M.D. 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 Willis Navarro, M.D.?
Near national averagePrimary specialty
Hematology (Internal Medicine) Physician
Medicare Part D claims
57 92% vs specialty avg
MIPS final score
81.7/100 1.4 pts vs avg
Specialty distribution in Arizona
How Hematology (Internal Medicine) Physician compares to other specialties among Arizona providers
Medicare quality performance, MIPS
Willis Navarro, M.D.'s 2023 MIPS final score plotted against the Hematology (Internal Medicine) Physician national average
- MIPS Final Score
- 81.7/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Hematology (Internal Medicine) Physician) - 81.7/100 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).
Willis Navarro, M.D. appears in the CMS NPPES registry as a Hematology (Internal Medicine) Physician provider holding M.D. credentials at 3838 N CAMPBELL AVE BLDG 1, Tucson, AZ, 85719, with a listed phone of (520) 694-2873. NPI 1871538421 was issued on 06/18/2006.
Medicare Part D records for calendar year 2023 show 57 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $337K in drug spend, split 44% brand-name and 56% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 81.7/100 for the 2023 performance year (Quality 69.9, Cost 59.7), compared with the national average of 83.1.
Hematology (Internal Medicine) Physician is a narrow specialty nationwide, with 1,436 enrolled providers across 50 states and an average of 693 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 | 1871538421 |
|---|---|
| Specialty | Hematology (Internal Medicine) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 06/18/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
81.7216
Final Score
Avg: 83.1
69.8683
Quality
59.7305
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Willis Navarro, M.D. 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.
Banner-University Medical Group
Tucson, 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 · Above average
Willis Navarro, M.D. - brand share 44.0%
Hematology (Internal Medicine) Physician average
44% brand-name claims vs 56% generic, on 57 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.
57
Total Claims
$337K
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 72
- Total Day Supply
- 1,867
- Brand vs Generic
- 44% brand / 56% generic
- Brand Drug Cost
- $337K
- Generic Drug Cost
- $504
Patient Demographics
- Average Patient Age
- 74.3 years
- Avg HCC Risk Score
- 2.46
More Hematology (Internal Medicine) Physician in AZ →
All providers in Arizona →
Compare specialties →
Hematology (Internal Medicine) Physician Overview
How Willis Navarro, M.D. fits within the Hematology (Internal Medicine) Physician landscape nationally.
1,436
Hematology (Internal Medicine) Physician Providers in US
50
States with Hematology (Internal Medicine) Physician
693
Avg Claims per Provider
Willis Navarro, M.D.'s 57 claims are below the specialty average of 693.
Nearby Hematology (Internal Medicine) Physician Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Navarro.
Dr. Gino Bottino
MD
Tucson, AZ
Dr. Pedro Camacho
MD
Gilbert, AZ
Dr. Wendy Chen
DO
Oro Valley, AZ
Dr. Saurabh Chhabra
M.D.
Scottsdale, AZ
Dr. Rafael Fonseca
M.D.
Scottsdale, AZ
Compare Hematology (Internal 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 Arizona medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Hematology (Internal 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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Frequently Asked Questions
What is Willis Navarro, M.D.'s specialty? ▼
Willis Navarro, M.D. specializes in Hematology (Internal Medicine) Physician and practices in Tucson, Arizona. Credentials: M.D..
How much does Willis Navarro, M.D. prescribe under Medicare Part D? ▼
In 2023, Willis Navarro, M.D. wrote 57 Medicare Part D claims totaling $337K in drug costs for N/A beneficiaries.
What is Willis Navarro, M.D.'s Medicare quality score? ▼
Willis Navarro, M.D. has a CMS MIPS Final Score of 81.7/100 (Quality: 69.9, Cost: 59.7). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Willis Navarro, M.D. located? ▼
Willis Navarro, M.D. is located at 3838 N CAMPBELL AVE BLDG 1, Tucson, AZ, 85719. Phone: (520) 694-2873.
What is Willis Navarro, M.D.'s NPI number? ▼
Willis Navarro, M.D.'s National Provider Identifier (NPI) is 1871538421, issued on 06/18/2006.
Does Willis Navarro, M.D. prescribe more brand-name or generic drugs? ▼
Willis Navarro, M.D.'s prescribing is 44% brand-name and 56% generic drugs by claim count, with $337K in brand drug costs.
How many Hematology (Internal Medicine) Physician providers are there in the US? ▼
There are 1,436 Hematology (Internal Medicine) Physician providers across 50 states in the US. The average Hematology (Internal Medicine) Physician provider writes 693 Medicare Part D claims per year.
Does Willis Navarro, M.D. accept Medicare? ▼
Willis Navarro, M.D. appears in CMS Medicare data with 57 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Willis Navarro, M.D.'s credentials? ▼
Willis Navarro, M.D.'s NPI is 1871538421 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.
- 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.