NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1639174915 MD
Verify on CMS → Joanne Tollerton, MD
Family Medicine Physician in Chinle, 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 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
1K
Medicare Part D claims · 165 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
79%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
84.2/100
▲ 1 pts above national avg 83.5 · Above neutral
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Joanne Tollerton, MD reported a CMS MIPS final score of 84.2/100 - above the 83.5 national average - and filed 1,100 Medicare Part D claims in 2023.
- 84.2/100
- MIPS score · +1 vs avg
- 1K
- Part D claims, 2023
- 79%
- 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.
Joanne Tollerton, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
84 ≥ 42nd percentile 42% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured 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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Joanne Tollerton, MD sits
This provider among family medicine physician peers
Across the 21,266 family medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Joanne Tollerton, MD writes more Part D claims than 36% of them and scores higher on MIPS quality than 42% - 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 family medicine physician peer from a representative sample of 60; the gold marker is Joanne Tollerton, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Joanne Tollerton, MD 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 Joanne Tollerton, MD?
Near national averagePrimary specialty
Family Medicine Physician
Medicare Part D claims
1,100 68% vs specialty avg
MIPS final score
84.2/100 0.7 pts vs avg
Specialty distribution in Arizona
How Family Medicine Physician compares to other specialties among Arizona providers
Medicare quality performance, MIPS
Joanne Tollerton, MD's 2023 MIPS final score plotted against the Family Medicine Physician national average
- MIPS Final Score
- 84.2/100
- vs 83.5 national avg · 2023 performance year
MIPS final score (Family Medicine Physician) - 84.2/100 vs national avg 83.5
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).
Joanne Tollerton, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at U.S. 191 & HOSPITAL DRIVE, Chinle, AZ, 86503, with a listed phone of (928) 674-7001. NPI 1639174915 was issued on 06/14/2005.
Medicare Part D records for calendar year 2023 show 1,100 prescription claims written by this provider, covering 165 Medicare beneficiaries and totaling roughly $86K in drug spend, split 16% brand-name and 79% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 84.2/100 for the 2023 performance year (Quality 64.9, Cost 67.6), compared with the 83.5 average among clinicians with a measured score.
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 | 1639174915 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 06/14/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
84.2432
Final Score
Measured-score avg: 83.5
64.91
Quality
67.5672
Cost
98
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Joanne Tollerton, 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.
Dhhs Phs Naihs Chinle Comprehensive Health Care Facility
Chinle, 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
Joanne Tollerton, MD - brand share 16.0%
Family Medicine Physician average
16% brand-name claims vs 79% generic, on 1,100 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.
1,100
Total Claims
$86K
Total Drug Cost
165
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,161
- Total Day Supply
- 33,278
- Brand vs Generic
- 16% brand / 79% generic
- Brand Drug Cost
- $76K
- Generic Drug Cost
- $9K
- Antibiotic Claims
- 25
Patient Demographics
- Average Patient Age
- 70.9 years
- Avg HCC Risk Score
- 1.39
- Gender Split
- 69% female / 31% male
- Age Distribution
- <65: 31, 65-74: 78, 75-84: 38, 85+: 18
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Joanne Tollerton, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
145 claims
- Lisinopril
Lisinopril
88 claims
- Metformin Hcl Er
Metformin Hcl Er
74 claims
- Metformin Hcl 53
Metformin Hcl
53 claims
- Losartan Potassium 41
Losartan Potassium
41 claims
- Metoprolol Succinate 39
Metoprolol Succinate
39 claims
- Amlodipine Besylate 30
Amlodipine Besylate
30 claims
- Synthroid 26
Synthroid
26 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 145 |
| Lisinopril | 88 |
| Metformin Hcl Er Metformin Hcl | 74 |
| Metformin Hcl | 53 |
| Losartan Potassium | 41 |
| Metoprolol Succinate | 39 |
| Amlodipine Besylate | 30 |
| Synthroid Levothyroxine Sodium | 26 |
| Tamsulosin Hcl | 26 |
| Easy Touch Alcohol Prep Pads Alcohol Antiseptic Pads | 25 |
* 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 Joanne Tollerton, 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
Joanne Tollerton, MD's 1,100 claims are below the specialty average of 3,418.
Nearby Family Medicine Physician Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Tollerton.
Dr. Muhammad Aamer
M.D.
Yuma, AZ
Dr. Ndidi Abara
M.D.
Yuma, AZ
Dr. Steven Abdelmalak
MD
Scottsdale, AZ
Dr. Lindsey Abeyta
FNP
Tucson, AZ
Dr. Modupeola Abiodun
M.D.
Chandler, AZ
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 Arizona 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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Frequently Asked Questions
What is Joanne Tollerton, MD's specialty? ▼
Joanne Tollerton, MD specializes in Family Medicine Physician and practices in Chinle, Arizona. Credentials: MD.
How much does Joanne Tollerton, MD prescribe under Medicare Part D? ▼
In 2023, Joanne Tollerton, MD wrote 1,100 Medicare Part D claims totaling $86K in drug costs for 165 beneficiaries.
What is Joanne Tollerton, MD's Medicare quality score? ▼
Joanne Tollerton, MD has a CMS MIPS Final Score of 84.2/100 (Quality: 64.9, Cost: 67.6). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Joanne Tollerton, MD located? ▼
Joanne Tollerton, MD is located at U.S. 191 & HOSPITAL DRIVE, Chinle, AZ, 86503. Phone: (928) 674-7001.
What is Joanne Tollerton, MD's NPI number? ▼
Joanne Tollerton, MD's National Provider Identifier (NPI) is 1639174915, issued on 06/14/2005.
Does Joanne Tollerton, MD prescribe more brand-name or generic drugs? ▼
Joanne Tollerton, MD's prescribing is 16% brand-name and 79% generic drugs by claim count, with $76K in brand drug costs.
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 Joanne Tollerton, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Joanne Tollerton, MD's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Metformin Hcl Er. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Joanne Tollerton, MD accept Medicare? ▼
Joanne Tollerton, MD appears in CMS Medicare data with 1,100 Part D claims and 165 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Joanne Tollerton, MD's credentials? ▼
Joanne Tollerton, MD's NPI is 1639174915 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.