NPI registry status
Active
2026 NPPES data Adult Reconstructive Orthopaedic Surgery Physician NPI 1669699542 MD
Verify on CMS → Stephen Kayiaros, MD
Adult Reconstructive Orthopaedic Surgery Physician in Princeton, New Jersey.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,254 in Adult Reconstructive Orthopaedic Surgery 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
589
Medicare Part D claims · 223 beneficiaries · Adult Reconstructive Orthopaedic Surgery Physician avg: 493
Generic prescribing
98%
generic claims · 2% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
75/100
CMS neutral threshold · no category scores published
Industry payments
$10.8K
26 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Stephen Kayiaros, MD carries the neutral CMS MIPS final score of 75/100, assigned where no category was scored - and filed 589 Medicare Part D claims in 2023.
- 75/100
- CMS neutral score · not measured
- 589
- Part D claims, 2023
- 98%
- 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 Stephen Kayiaros, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1669699542), first enumerated 04/20/2007.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 589 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)
CMS assigned a neutral MIPS final score of 75/100 where no performance category was scored — not a measured quality rank.
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
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$10.8K in reported industry payments (26 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.
CMS NPPES provider registry desk
NPI 1669699542 · Adult Reconstructive Orthopaedic Surgery Physician
NPI-10 · ENUM-MID · TAX-NARROW · MIPS-NEUTRAL · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1669699542
- ENUM-MID 2007
- TAX-NARROW 1,254
- MIPS-NEUTRAL 75/100
- RX-LIGHT 589
- BOOK-THIN 39 in New Jersey
- PHOTO-ENUM Shahin Sheibani-Rad · 2007
Stephen Kayiaros, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
589 ≥ 66th percentile 66% of 1,370,886 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. 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 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Stephen Kayiaros, 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 Stephen Kayiaros, MD?
CMS neutral score, not measuredPrimary specialty
Adult Reconstructive Orthopaedic Surgery Physician
Medicare Part D claims
589 19% vs specialty avg
MIPS final score
75/100
Specialty distribution in New Jersey
How Adult Reconstructive Orthopaedic Surgery Physician compares to other specialties among New Jersey providers
MIPS score not measured
CMS assigned a neutral 75/100 threshold
CMS did not publish any Quality, Cost, Promoting Interoperability, or Improvement Activities category score for this clinician. This administrative threshold is not comparable with the national average of clinicians whose MIPS score was measured.
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 | 1669699542 |
|---|---|
| Specialty | Adult Reconstructive Orthopaedic Surgery Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 04/20/2007 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
75
Final Score
CMS neutral threshold · not measured
Reporting: Individual
Hospital and facility affiliations
Facilities where Stephen Kayiaros, 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.
Orthonj LLC
Princeton, NJ
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 Stephen Kayiaros, MD. Source: openpaymentsdata.cms.gov.
Total received
$10.8K
Largest payer
OMNIlife science, 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 · Generic-heavy
Stephen Kayiaros, MD - brand share 2.0%
Adult Reconstructive Orthopaedic Surgery Physician average
2% brand-name claims vs 98% generic, on 589 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.
589
Total Claims
$17K
Total Drug Cost
223
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 706
- Total Day Supply
- 15,563
- Brand vs Generic
- 2% brand / 98% generic
- Brand Drug Cost
- $3K
- Generic Drug Cost
- $14K
- Opioid Claims
- 143 (24.3% rate)
- Antibiotic Claims
- 47
Patient Demographics
- Average Patient Age
- 73.6 years
- Avg HCC Risk Score
- 0.91
- Gender Split
- 63% female / 37% male
- Age Distribution
- <65: 13, 65-74: 106, 75-84: 93, 85+: 11
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Stephen Kayiaros, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Celecoxib
Celecoxib
175 claims
- Meloxicam
Meloxicam
126 claims
- Tramadol Hcl
Tramadol Hcl
70 claims
- Oxycodone Hcl 67
Oxycodone Hcl
67 claims
- Amoxicillin 31
Amoxicillin
31 claims
- Methylprednisolone 21
Methylprednisolone
21 claims
- Dexamethasone 12
Dexamethasone
12 claims
- Gabapentin 11
Gabapentin
11 claims
| Drug | Claims |
|---|---|
| Celecoxib | 175 |
| Meloxicam | 126 |
| Tramadol Hcl | 70 |
| Oxycodone Hcl | 67 |
| Amoxicillin | 31 |
| Methylprednisolone | 21 |
| Dexamethasone | 12 |
| Gabapentin | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Adult Reconstructive Orthopaedic Surgery Physician in NJ →
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Adult Reconstructive Orthopaedic Surgery Physician Overview
How Stephen Kayiaros, MD fits within the Adult Reconstructive Orthopaedic Surgery Physician landscape nationally.
1,254
Adult Reconstructive Orthopaedic Surgery Physician Providers in US
51
States with Adult Reconstructive Orthopaedic Surgery Physician
493
Avg Claims per Provider
Stephen Kayiaros, MD's 589 claims are above the specialty average of 493.
Nationwide Adult Reconstructive Orthopaedic Surgery Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Kayiaros, both outside New Jersey so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (75 here).
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Adult Reconstructive Orthopaedic Surgery Physician Providers in New Jersey
Other clinicians with the same primary specialty enrolled in New Jersey, drawn from the same CMS NPPES roster as Kayiaros.
One of 39 Adult Reconstructive Orthopaedic Surgery Physician providers enrolled in New Jersey, 5 are shown here.
Frequently Asked Questions
What is Stephen Kayiaros, MD's specialty? ▼
Stephen Kayiaros, MD specializes in Adult Reconstructive Orthopaedic Surgery Physician and practices in Princeton, New Jersey. Credentials: MD.
How much does Stephen Kayiaros, MD prescribe under Medicare Part D? ▼
In 2023, Stephen Kayiaros, MD wrote 589 Medicare Part D claims totaling $17K in drug costs for 223 beneficiaries.
What is Stephen Kayiaros, MD's Medicare quality score? ▼
Stephen Kayiaros, MD has a CMS MIPS Final Score of 75/100. CMS published no Quality, Promoting Interoperability, Improvement Activity or Cost score for this clinician, so the final score is the neutral performance threshold CMS assigns rather than a measured result. 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 Stephen Kayiaros, MD located? ▼
Stephen Kayiaros, MD is located at 211 N HARRISON ST, Princeton, NJ, 08540. Phone: (609) 683-7800.
What is Stephen Kayiaros, MD's NPI number? ▼
Stephen Kayiaros, MD's National Provider Identifier (NPI) is 1669699542, issued on 04/20/2007.
Does Stephen Kayiaros, MD prescribe more brand-name or generic drugs? ▼
Stephen Kayiaros, MD's prescribing is 2% brand-name and 98% generic drugs by claim count, with $3K in brand drug costs.
Does Stephen Kayiaros, MD prescribe opioids? ▼
Yes, Stephen Kayiaros, MD had 143 opioid claims in 2023 with an opioid prescribing rate of 24.3%.
How many Adult Reconstructive Orthopaedic Surgery Physician providers are there in the US? ▼
There are 1,254 Adult Reconstructive Orthopaedic Surgery Physician providers across 51 states in the US. The average Adult Reconstructive Orthopaedic Surgery Physician provider writes 493 Medicare Part D claims per year.
What drugs does Stephen Kayiaros, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Stephen Kayiaros, MD's most frequently prescribed drugs include Celecoxib, Meloxicam, Tramadol Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Stephen Kayiaros, MD accept Medicare? ▼
Stephen Kayiaros, MD appears in CMS Medicare data with 589 Part D claims and 223 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stephen Kayiaros, MD's credentials? ▼
Stephen Kayiaros, MD's NPI is 1669699542 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.