NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1144311663 MD
Verify on CMS → William Sullivan, MD
Rheumatology Physician in Fairhope, Alabama.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,181 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
10K
Medicare Part D claims · 1K beneficiaries · Rheumatology Physician avg: 2K
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
87.6/100
▲ 4 pts above national avg 83.1 · Above neutral
Industry payments
$2.4K
114 payments · CMS Open Payments (Sunshine Act)
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
William Sullivan, MD reported a CMS MIPS final score of 87.6/100 - above the 83.1 national average - and filed 9,957 Medicare Part D claims in 2023.
- 87.6/100
- MIPS score · +4 vs avg
- 10K
- Part D claims, 2023
- 86%
- 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.
William Sullivan, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
88 Top 46% higher than 54% 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 William Sullivan, MD sits
This provider among rheumatology physician peers
Across the 2,181 rheumatology physician providers who report both Medicare Part D prescribing and a MIPS quality score, William Sullivan, MD writes more Part D claims than 99% of them and scores higher on MIPS quality than 57% - placing this provider in the high-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 rheumatology physician peer from a representative sample of 60; the gold marker is William Sullivan, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
William Sullivan, 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 William Sullivan, MD?
High performer (top quartile)Primary specialty
Rheumatology Physician
Medicare Part D claims
9,957 385% vs specialty avg
MIPS final score
87.6/100 4.5 pts vs avg
Specialty distribution in Alabama
How Rheumatology Physician compares to other specialties among Alabama providers
Medicare quality performance, MIPS
William Sullivan, MD's 2023 MIPS final score plotted against the Rheumatology Physician national average
- MIPS Final Score
- 87.6/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Rheumatology Physician) - 87.6/100 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).
William Sullivan, MD appears in the CMS NPPES registry as a Rheumatology Physician provider holding MD credentials at 3 MEDICAL PARK DRIVE, Fairhope, AL, 36532, with a listed phone of (251) 928-8804. NPI 1144311663 was issued on 09/28/2006.
Medicare Part D records for calendar year 2023 show 9,957 prescription claims written by this provider, covering 1,135 Medicare beneficiaries and totaling roughly $8.1 million in drug spend, split 14% brand-name and 86% generic by claim count, with an opioid prescribing rate of 17.3%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 87.6/100 for the 2023 performance year (Quality 77.7, Cost 88.3), compared with the national average of 83.1.
Rheumatology Physician is a mid-sized specialty nationwide, with 6,181 enrolled providers across 52 states and an average of 2,054 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 | 1144311663 |
|---|---|
| Specialty | Rheumatology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 09/28/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
87.5694
Final Score
Avg: 83.1
77.7265
Quality
88.2625
Cost
Reporting: Group practice
Hospital and facility affiliations
Facilities where William Sullivan, 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.
Arthritis Care OF The Eastern Shore, LLC
Fairhope, AL
Imc-Diagnostic And Medical Clinic LLC
Mobile, AL
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 William Sullivan, MD. Source: openpaymentsdata.cms.gov.
Total received
$2.4K
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.
Brand vs generic prescribing mix · Typical
William Sullivan, MD - brand share 14.0%
Rheumatology Physician average
14% brand-name claims vs 86% generic, on 9,957 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.
9,957
Total Claims
$8.1M
Total Drug Cost
1,135
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 16,599
- Total Day Supply
- 487,232
- Brand vs Generic
- 14% brand / 86% generic
- Brand Drug Cost
- $7.7M
- Generic Drug Cost
- $339K
- Opioid Claims
- 1,721 (17.3% rate)
- Antibiotic Claims
- 75
Patient Demographics
- Average Patient Age
- 70.6 years
- Avg HCC Risk Score
- 1.45
- Gender Split
- 76% female / 24% male
- Age Distribution
- <65: 211, 65-74: 536, 75-84: 331, 85+: 57
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What William Sullivan, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydroxychloroquine…
Hydroxychloroquine Sulfate
1,329 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
1,080 claims
- Methotrexate
Methotrexate
1,000 claims
- Prednisone
Prednisone
921 claims
- Gabapentin
Gabapentin
583 claims
- Tramadol Hcl 362
Tramadol Hcl
362 claims
- Humira(Cf) Pen 288
Humira(Cf) Pen
288 claims
- Folic Acid 253
Folic Acid
253 claims
| Drug | Claims |
|---|---|
| Hydroxychloroquine Sulfate | 1,329 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 1,080 |
| Methotrexate Methotrexate Sodium | 1,000 |
| Prednisone | 921 |
| Gabapentin | 583 |
| Tramadol Hcl | 362 |
| Humira(Cf) Pen Adalimumab | 288 |
| Folic Acid | 253 |
| Leflunomide | 241 |
| Duloxetine Hcl | 239 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How William Sullivan, MD fits within the Rheumatology Physician landscape nationally.
6,181
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,054
Avg Claims per Provider
William Sullivan, MD's 9,957 claims are above the specialty average of 2,054.
Nearby Rheumatology Physician Providers in Alabama
Other clinicians with the same primary specialty enrolled in Alabama, drawn from the same CMS NPPES roster as Sullivan.
Dr. Joel Abbott
MD
Mountain Brk, AL
Dr. Hamdy Ahmed
MD
Mobile, AL
Dr. Graciela Alarcon
MD
Birmingham, AL
Amanda Alexander
Birmingham, AL
Dr. Zarmeena Ali
MD
Auburn, AL
Compare Rheumatology 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 Alabama medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Rheumatology 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 William Sullivan, MD's specialty? ▼
William Sullivan, MD specializes in Rheumatology Physician and practices in Fairhope, Alabama. Credentials: MD.
How much does William Sullivan, MD prescribe under Medicare Part D? ▼
In 2023, William Sullivan, MD wrote 9,957 Medicare Part D claims totaling $8.1M in drug costs for 1,135 beneficiaries.
What is William Sullivan, MD's Medicare quality score? ▼
William Sullivan, MD has a CMS MIPS Final Score of 87.6/100 (Quality: 77.7, Cost: 88.3). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is William Sullivan, MD located? ▼
William Sullivan, MD is located at 3 MEDICAL PARK DRIVE, Fairhope, AL, 36532. Phone: (251) 928-8804.
What is William Sullivan, MD's NPI number? ▼
William Sullivan, MD's National Provider Identifier (NPI) is 1144311663, issued on 09/28/2006.
Does William Sullivan, MD prescribe more brand-name or generic drugs? ▼
William Sullivan, MD's prescribing is 14% brand-name and 86% generic drugs by claim count, with $7.7M in brand drug costs.
Does William Sullivan, MD prescribe opioids? ▼
Yes, William Sullivan, MD had 1,721 opioid claims in 2023 with an opioid prescribing rate of 17.3%.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,181 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,054 Medicare Part D claims per year.
What drugs does William Sullivan, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, William Sullivan, MD's most frequently prescribed drugs include Hydroxychloroquine Sulfate, Hydrocodone-Acetaminophen, Methotrexate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Sullivan, MD accept Medicare? ▼
William Sullivan, MD appears in CMS Medicare data with 9,957 Part D claims and 1,135 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Sullivan, MD's credentials? ▼
William Sullivan, MD's NPI is 1144311663 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
Compiled from official public sources by the PlainDoctor editorial team.