NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1558775130 MD
Verify on CMS → Jonathan Mills, MD
Rheumatology Physician in Chattanooga, Tennessee.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,377 in Rheumatology 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
2K
Medicare Part D claims · 306 beneficiaries · Rheumatology Physician avg: 2K
MIPS score
96.2/100
▲ 13 pts above national avg 83.5 · Exceptional
Industry payments
$699.47
37 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Jonathan Mills, MD reported a CMS MIPS final score of 96.2/100 - above the 83.5 national average - and filed 2,009 Medicare Part D claims in 2024.
- 96.2/100
- MIPS score · +13 vs avg
- 2K
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥82nd
- pct among measured MIPS (lower-bound band)
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.
Federal trust snapshot
What official records show about Jonathan Mills, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1558775130), first enumerated 06/11/2014.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 2,009 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 96.2/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$699.47 in reported industry payments (37 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Mills with other Rheumatology Physician providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in Tennessee
- Dr. Mishal Abdullah, M.D. Knoxville, TN
- Dr. Annette Abril, M.D. Kingsport, TN
- Dr. Iman Abutineh, MD Memphis, TN
- Dr. Titilola Akhigbe, M.D Memphis, TN
- Dr. Mohammad Ali, M.D Hendersonville, TN
- Dr. Jane Alissandratos, M.D. Cordova, TN
Other specialties in Chattanooga: Family Nurse Practitioner (447) · Student in an Organized Health Care Education/Training Program (398) · Registered Nurse (377) · Mental Health Counselor (343)
CMS NPPES provider registry desk
NPI 1558775130 · Rheumatology Physician
NPI-10 · ENUM-MID · TAX-MID · MIPS-ELITE · RX-MID · BOOK-THIN · PHOTO-FINISH
- NPI-10 1558775130
- ENUM-MID 2014
- TAX-MID 6K Rheumatology Physician
- MIPS-ELITE 96.2/100
- RX-MID 2,009
- BOOK-THIN 113 in Tennessee
- PHOTO-FINISH Padma Chimata, M.D. · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Mills · this pro…
Mills · this provider
96.2 MIPS pts
- Rattandeep Singh…
Rattandeep Singh, MD
96.2 MIPS pts
- Padma Chimata, M…
Padma Chimata, M.D.
96.2 MIPS pts
- Than Win, MD · n…
Than Win, MD
96.2 MIPS pts
- Alex Lam, MD · n…
Alex Lam, MD
96.2 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Jonathan Mills, 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.
96 ≥ 82nd percentile 82% 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 Jonathan Mills, MD sits
This provider among rheumatology physician peers
Across the 1,970 rheumatology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Jonathan Mills, MD writes more Part D claims than 55% of them and scores higher on MIPS quality than 82% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one rheumatology physician peer from a representative sample of 60; the gold marker is Jonathan Mills, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Jonathan Mills, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 2 hospital affiliations - 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 Jonathan Mills, MD?
High performer (top quartile)Primary specialty
Rheumatology Physician
Medicare Part D claims
2,009 2% vs specialty avg
MIPS final score
96.2/100 12.7 pts vs avg
Specialty distribution in Tennessee
How Rheumatology Physician compares to other specialties among Tennessee providers
Medicare quality performance, MIPS
Jonathan Mills, MD's 2023 MIPS final score plotted against the Rheumatology Physician national average
- MIPS Final Score
- 96.2/100
- vs 83.5 national avg · 2023 performance year
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).
Practice Address
Provider Details
| NPI | 1558775130 |
|---|---|
| Specialty | Rheumatology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/11/2014 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
96.1922
Final Score
Measured-score avg: 83.5
85.2035
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Jonathan Mills, 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.
Chattanooga Hamilton County Hospital Authority
Chattanooga, TN
Erlanger Health
Chattanooga, TN
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Jonathan Mills, MD. Source: openpaymentsdata.cms.gov.
Total received
$699
Largest payer
ABBVIE INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
2,009
Total Claims
$1.8M
Total Drug Cost
306
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,186.667
- Total Day Supply
- 91,705
- Generic Drug Cost
- $45K
- Antibiotic Claims
- 13
Patient Demographics
- Average Patient Age
- 67.2 years
- Avg HCC Risk Score
- 1.77
- Gender Split
- 74% female / 26% male
- Age Distribution
- <65: 101, 65-74: 121, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Jonathan Mills, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Methotrexate
Methotrexate
409 claims
- Hydroxychloroquine…
Hydroxychloroquine Sulfate
328 claims
- Prednisone
Prednisone
201 claims
- Allopurinol 98
Allopurinol
98 claims
- Diclofenac Sodium 77
Diclofenac Sodium
77 claims
- Leflunomide 62
Leflunomide
62 claims
- Folic Acid 48
Folic Acid
48 claims
- Colchicine 47
Colchicine
47 claims
| Drug | Claims |
|---|---|
| Methotrexate Methotrexate Sodium | 409 |
| Hydroxychloroquine Sulfate | 328 |
| Prednisone | 201 |
| Allopurinol | 98 |
| Diclofenac Sodium | 77 |
| Leflunomide | 62 |
| Folic Acid | 48 |
| Colchicine | 47 |
| Alendronate Sodium | 41 |
| Duloxetine Hcl | 37 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Jonathan Mills, MD fits within the Rheumatology Physician landscape nationally.
6,377
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,058
Avg Claims per Provider
Jonathan Mills, MD's 2,009 claims are below the specialty average of 2,058.
Nationwide Rheumatology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Mills, both outside Tennessee so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (96.2 here).
Same NPPES enumeration year (2014)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Rheumatology Physician Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Mills.
One of 113 Rheumatology Physician providers enrolled in Tennessee, 11 are shown on this page.
Dr. Narender Annapureddy
M.D.
Nashville, TN
Dr. Judy Ash
M.D.
Cordova, TN
Dr. Daniel Austin
MD
Memphis, TN
Dr. James Baker
M.D.
Johnson City, TN
Dr. Tonya Baker
M.D.
Knoxville, TN
Compare Rheumatology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Jonathan Mills, MD's specialty? ▼
Jonathan Mills, MD specializes in Rheumatology Physician and practices in Chattanooga, Tennessee. Credentials: MD.
How much does Jonathan Mills, MD prescribe under Medicare Part D? ▼
In 2024, Jonathan Mills, MD wrote 2,009 Medicare Part D claims totaling $1.8M in drug costs for 306 beneficiaries.
What is Jonathan Mills, MD's Medicare quality score? ▼
Jonathan Mills, MD has a CMS MIPS Final Score of 96.2/100 (Quality: 85.2). 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 Jonathan Mills, MD located? ▼
Jonathan Mills, MD is located at 979 E 3RD ST STE B-805, Chattanooga, TN, 37403. Phone: (423) 778-4396.
What is Jonathan Mills, MD's NPI number? ▼
Jonathan Mills, MD's National Provider Identifier (NPI) is 1558775130, issued on 06/11/2014.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,377 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,058 Medicare Part D claims per year.
What drugs does Jonathan Mills, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Jonathan Mills, MD's most frequently prescribed drugs include Methotrexate, Hydroxychloroquine Sulfate, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Jonathan Mills, MD accept Medicare? ▼
Jonathan Mills, MD appears in CMS Medicare data with 2,009 Part D claims and 306 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jonathan Mills, MD's credentials? ▼
Jonathan Mills, MD's NPI is 1558775130 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.