NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1093767733 MD
Verify on CMS → Erin Arnold, MD
Rheumatology Physician in Skokie, Illinois.
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
3K
Medicare Part D claims · 459 beneficiaries · Rheumatology Physician avg: 2K
Generic prescribing
82%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
100/100
▲ 17 pts above national avg 83.5 · Exceptional
Industry payments
$10.4K
32 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Erin Arnold, MD reported a CMS MIPS final score of 100/100 - above the 83.5 national average - and filed 2,559 Medicare Part D claims in 2024.
- 100/100
- MIPS score · +17 vs avg
- 3K
- Part D claims, 2024
- 82%
- 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.
Federal trust snapshot
What official records show about Erin Arnold, 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 1093767733), first enumerated 05/17/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 2,559 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 100/100 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
$10.4K in reported industry payments (32 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not Erin Arnold, MD's individual license status. Verify directly with the state medical board.
Source: IDFPR annual report 2023
- 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.
CMS NPPES provider registry desk
NPI 1093767733 · Rheumatology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-ELITE · RX-MID · BOOK-THIN · PHOTO-FINISH
- NPI-10 1093767733
- ENUM-LEGACY 2006
- TAX-MID 6K Rheumatology Physician
- MIPS-ELITE 100/100
- RX-MID 2,559
- BOOK-THIN 267 in Illinois
- PHOTO-FINISH Phillip Aleksiejuk · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Arnold · this pr…
Arnold · this provider
100 MIPS pts
- Daniel Brandt · …
Daniel Brandt
100 MIPS pts
- Phillip Aleksiej…
Phillip Aleksiejuk
100 MIPS pts
- Abdul Aziz · near
Abdul Aziz
100 MIPS pts
- Sumeet Bhinder ·…
Sumeet Bhinder
100 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Erin Arnold, 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.
100 ≥ 92nd percentile 92% 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 Erin Arnold, 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, Erin Arnold, MD writes more Part D claims than 66% of them and scores higher on MIPS quality than 93% - 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 Erin Arnold, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Erin Arnold, 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 Erin Arnold, MD?
High performer (top quartile)Primary specialty
Rheumatology Physician
Medicare Part D claims
2,559 24% vs specialty avg
MIPS final score
100/100 16.5 pts vs avg
Specialty distribution in Illinois
How Rheumatology Physician compares to other specialties among Illinois providers
Medicare quality performance, MIPS
Erin Arnold, MD's 2023 MIPS final score plotted against the Rheumatology Physician national average
- MIPS Final Score
- 100/100
- 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 | 1093767733 |
|---|---|
| Specialty | Rheumatology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 05/17/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
100
Final Score
Measured-score avg: 83.5
100
Quality
Reporting: Group practice
Hospital and facility affiliations
Facilities where Erin Arnold, 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.
Orthopaedics And Rheumatology OF The North Shore SC
Skokie, IL
Select Rehabilitation, LLC
Glenview, IL
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 Erin Arnold, MD. Source: openpaymentsdata.cms.gov.
Total received
$10.4K
Largest payer
UCB, 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.
License & disciplinary context - Illinois IDFPR 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~42K Illinois medical licensees in 2023 - they are NOT specific to Erin Arnold, MD. To verify Erin Arnold, MD's current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Erin Arnold, MD - brand share 17.0%
Rheumatology Physician average
17% brand-name claims vs 82% generic, on 2,559 2024 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 2024.
2,559
Total Claims
$1.4M
Total Drug Cost
459
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,829.667
- Total Day Supply
- 142,665
- Brand vs Generic
- 17% brand / 82% generic
- Brand Drug Cost
- $1.3M
- Generic Drug Cost
- $54K
- Opioid Claims
- 79 (3.1% rate)
Patient Demographics
- Average Patient Age
- 75.1 years
- Avg HCC Risk Score
- 1.46
- Gender Split
- 72% female / 28% male
- Age Distribution
- <65: 17, 65-74: 210, 75-84: 174, 85+: 58
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Erin Arnold, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Methotrexate
Methotrexate
429 claims
- Hydroxychloroquine…
Hydroxychloroquine Sulfate
428 claims
- Allopurinol
Allopurinol
229 claims
- Prednisone
Prednisone
176 claims
- Gabapentin 90
Gabapentin
90 claims
- Celecoxib 85
Celecoxib
85 claims
- Leflunomide 85
Leflunomide
85 claims
- Diclofenac Sodium 81
Diclofenac Sodium
81 claims
| Drug | Claims |
|---|---|
| Methotrexate Methotrexate Sodium | 429 |
| Hydroxychloroquine Sulfate | 428 |
| Allopurinol | 229 |
| Prednisone | 176 |
| Gabapentin | 90 |
| Celecoxib | 85 |
| Leflunomide | 85 |
| Diclofenac Sodium | 81 |
| Methylprednisolone | 75 |
| Leucovorin Calcium | 66 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Erin Arnold, 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
Erin Arnold, MD's 2,559 claims are above the specialty average of 2,058.
Nationwide Rheumatology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Arnold, both outside Illinois so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (100 here).
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Rheumatology Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Arnold.
One of 267 Rheumatology Physician providers enrolled in Illinois, 5 are shown here.
Dr. Elaine Adams
MD
Maywood, IL
Dr. Emem Adolf-Ubokudom
M.D.
Chicago, IL
Dr. Shri Agrawal
M.D.
Chicago, IL
Dr. Umber Ahmad
DO
McHenry, IL
Saba Ahmed
Chicago, IL
Compare Rheumatology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Erin Arnold, MD's specialty? ▼
Erin Arnold, MD specializes in Rheumatology Physician and practices in Skokie, Illinois. Credentials: MD.
How much does Erin Arnold, MD prescribe under Medicare Part D? ▼
In 2024, Erin Arnold, MD wrote 2,559 Medicare Part D claims totaling $1.4M in drug costs for 459 beneficiaries.
What is Erin Arnold, MD's Medicare quality score? ▼
Erin Arnold, MD has a CMS MIPS Final Score of 100/100 (Quality: 100). 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 Erin Arnold, MD located? ▼
Erin Arnold, MD is located at 4709 GOLF RD, Skokie, IL, 60076. Phone: (847) 869-7233.
What is Erin Arnold, MD's NPI number? ▼
Erin Arnold, MD's National Provider Identifier (NPI) is 1093767733, issued on 05/17/2006.
Does Erin Arnold, MD prescribe more brand-name or generic drugs? ▼
Erin Arnold, MD's prescribing is 17% brand-name and 82% generic drugs by claim count, with $1.3M in brand drug costs.
Does Erin Arnold, MD prescribe opioids? ▼
Yes, Erin Arnold, MD had 79 opioid claims in 2024 with an opioid prescribing rate of 3.1%.
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 Erin Arnold, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Erin Arnold, MD's most frequently prescribed drugs include Methotrexate, Hydroxychloroquine Sulfate, Allopurinol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Erin Arnold, MD accept Medicare? ▼
Erin Arnold, MD appears in CMS Medicare data with 2,559 Part D claims and 459 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Erin Arnold, MD's credentials? ▼
Erin Arnold, MD's NPI is 1093767733 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.