NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1609944396 MD
Verify on CMS → Steven Portney, MD
Rheumatology Physician in Bingham Farms, Michigan.
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 · 364 beneficiaries · Rheumatology Physician avg: 2K
Generic prescribing
74%
generic claims · 26% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
83.4/100
▼ 0 pts below national avg 83.5 · Above neutral
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Steven Portney, MD reported a CMS MIPS final score of 83.4/100 - below the 83.5 national average - and filed 2,427 Medicare Part D claims in 2024.
- 83.4/100
- MIPS score · 0 vs avg
- 2K
- Part D claims, 2024
- 74%
- 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 Steven Portney, 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 1609944396), first enumerated 12/01/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 2,427 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 83.4/100 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
- State context
State board disciplinary context
Michigan statewide board action statistics are published annually — these figures describe aggregate state activity, not Steven Portney, MD's individual license status. Verify directly with the state medical board.
Source: MI-BOM 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 1609944396 · Rheumatology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-INLINE · RX-MID · BOOK-THIN · PHOTO-FINISH
- NPI-10 1609944396
- ENUM-LEGACY 2006
- TAX-MID 6K Rheumatology Physician
- MIPS-INLINE 83.4/100
- RX-MID 2,427
- BOOK-THIN 154 in Michigan
- PHOTO-FINISH Lynn Ludmer, M.D. · ±0.1
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Lynn Ludmer, M.D…
Lynn Ludmer, M.D.
83.3 MIPS pts
- Ross Thibodaux, …
Ross Thibodaux, M.D.
83.3 MIPS pts
- William Knibbe, …
William Knibbe, MD
83.3 MIPS pts
- Portney · this p…
Portney · this provider
83.4 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Steven Portney, 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.
83 ≥ 39th percentile 39% 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 Steven Portney, 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, Steven Portney, MD writes more Part D claims than 64% of them and scores higher on MIPS quality than 40% - placing this provider in the high-volume, lower-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 Steven Portney, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Steven Portney, 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 Steven Portney, MD?
Near national averagePrimary specialty
Rheumatology Physician
Medicare Part D claims
2,427 18% vs specialty avg
MIPS final score
83.4/100 0.1 pts vs avg
Specialty distribution in Michigan
How Rheumatology Physician compares to other specialties among Michigan providers
Medicare quality performance, MIPS
Steven Portney, MD's 2023 MIPS final score plotted against the Rheumatology Physician national average
- MIPS Final Score
- 83.4/100
- 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 | 1609944396 |
|---|---|
| Specialty | Rheumatology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 12/01/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
83.357
Final Score
Measured-score avg: 83.5
68.0602
Quality
60.6155
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Steven Portney, 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.
Henry Ford Health St. John Hospital
Southfield, MI
Newland Medical Associates, P.C.
Bingham Farms, MI
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Michigan MI-BOM 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 ~41K Michigan medical licensees in 2023 - they are NOT specific to Steven Portney, MD. To verify Steven Portney, MD's current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases
MI-BOM 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 Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Steven Portney, MD - brand share 26.0%
Rheumatology Physician average
26% brand-name claims vs 74% generic, on 2,427 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.
2,427
Total Claims
$3.9M
Total Drug Cost
364
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,512.6
- Total Day Supply
- 132,121
- Brand vs Generic
- 26% brand / 74% generic
- Brand Drug Cost
- $3.8M
- Generic Drug Cost
- $61K
- Opioid Claims
- 20 (0.8% rate)
Patient Demographics
- Average Patient Age
- 70.9 years
- Avg HCC Risk Score
- 1.60
- Gender Split
- 79% female / 21% male
- Age Distribution
- <65: 60, 65-74: 184, 75-84: 101, 85+: 19
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Steven Portney, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Methotrexate
Methotrexate
518 claims
- Prednisone
Prednisone
340 claims
- Hydroxychloroquine…
Hydroxychloroquine Sulfate
255 claims
- Enbrel Sureclick 160
Enbrel Sureclick
160 claims
- Leflunomide 145
Leflunomide
145 claims
- Enbrel 117
Enbrel
117 claims
- Humira(Cf) Pen 101
Humira(Cf) Pen
101 claims
- Xeljanz Xr 61
Xeljanz Xr
61 claims
| Drug | Claims |
|---|---|
| Methotrexate Methotrexate Sodium | 518 |
| Prednisone | 340 |
| Hydroxychloroquine Sulfate | 255 |
| Enbrel Sureclick Etanercept | 160 |
| Leflunomide | 145 |
| Enbrel Etanercept | 117 |
| Humira(Cf) Pen Adalimumab | 101 |
| Xeljanz Xr Tofacitinib Citrate | 61 |
| Folic Acid | 57 |
| Sulfasalazine | 55 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Steven Portney, 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
Steven Portney, MD's 2,427 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 Portney, both outside Michigan so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (83.4 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 Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Portney.
One of 154 Rheumatology Physician providers enrolled in Michigan, 5 are shown here.
Dr. Ayat Abyad
MD
Detroit, MI
Dr. Brandon Ahlgren
MD
Detroit, MI
Khashayar Ahmadmehrabi
Ann Arbor, MI
Dr. Fadi Ajine
MD
Kalamazoo, MI
Dr. Imad Alazem
M.D.
Dearborn, MI
Compare Rheumatology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Steven Portney, MD's specialty? ▼
Steven Portney, MD specializes in Rheumatology Physician and practices in Bingham Farms, Michigan. Credentials: MD.
How much does Steven Portney, MD prescribe under Medicare Part D? ▼
In 2024, Steven Portney, MD wrote 2,427 Medicare Part D claims totaling $3.9M in drug costs for 364 beneficiaries.
What is Steven Portney, MD's Medicare quality score? ▼
Steven Portney, MD has a CMS MIPS Final Score of 83.4/100 (Quality: 68.1, Cost: 60.6). 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 Steven Portney, MD located? ▼
Steven Portney, MD is located at 31500 TELEGRAPH RD STE 225, Bingham Farms, MI, 48025. Phone: (248) 552-0620.
What is Steven Portney, MD's NPI number? ▼
Steven Portney, MD's National Provider Identifier (NPI) is 1609944396, issued on 12/01/2006.
Does Steven Portney, MD prescribe more brand-name or generic drugs? ▼
Steven Portney, MD's prescribing is 26% brand-name and 74% generic drugs by claim count, with $3.8M in brand drug costs.
Does Steven Portney, MD prescribe opioids? ▼
Yes, Steven Portney, MD had 20 opioid claims in 2024 with an opioid prescribing rate of 0.8%.
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 Steven Portney, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Steven Portney, MD's most frequently prescribed drugs include Methotrexate, Prednisone, Hydroxychloroquine Sulfate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Steven Portney, MD accept Medicare? ▼
Steven Portney, MD appears in CMS Medicare data with 2,427 Part D claims and 364 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Steven Portney, MD's credentials? ▼
Steven Portney, MD's NPI is 1609944396 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.