NPI registry status
Active
2026 NPPES data Orthopaedic Hand Surgery Physician NPI 1285623488 MD
Verify on CMS → John Showalter, MD
Orthopaedic Hand Surgery Physician in Warrenville, 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 2,013 in Orthopaedic Hand 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.
What the federal data shows
John Showalter, MD is an Orthopaedic Hand Surgery Physician in Warrenville, Illinois, listed in the federal CMS National Provider Identifier registry.
- #160
- Orthopaedic Hand Surgery Physician rank among Illinois specialties
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 John Showalter, MD
Bare NPI registry listing — limited federal enrichment beyond basic enumeration. Verify all credentials with official sources.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1285623488), first enumerated 10/19/2005.
Source: CMS NPPES
- Not in federal data
Medicare Part D participation
No 2023 Medicare Part D prescribing volume appears in the CMS public file for this NPI (may reflect specialty, new enrollment, or non-prescribing role).
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- State context
State board disciplinary context
Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not John Showalter, 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 1285623488 · Orthopaedic Hand Surgery Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-NONE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1285623488
- ENUM-LEGACY 2005
- TAX-NARROW 2,013
- RX-NONE No Part D
- BOOK-THIN 87 in Illinois
- PHOTO-ENUM Phillip Wright · 2005
◑
Board-eligible specialty (heuristic, not verified)
John Showalter, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about John Showalter, MD?
Quality data not reportedPrimary specialty
Orthopaedic Hand Surgery Physician
Specialty distribution in Illinois
How Orthopaedic Hand Surgery Physician compares to other specialties among Illinois providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Orthopaedic Hand Surgery Physician. Verify directly:
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 | 1285623488 |
|---|---|
| Specialty | Orthopaedic Hand Surgery Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/19/2005 |
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 John Showalter, MD. To verify John Showalter, 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.
Orthopaedic Hand Surgery Physician Overview
How John Showalter, MD fits within the Orthopaedic Hand Surgery Physician landscape nationally.
2,013
Orthopaedic Hand Surgery Physician Providers in US
52
States with Orthopaedic Hand Surgery Physician
185
Avg Claims per Provider
Nationwide Orthopaedic Hand Surgery Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Showalter, both outside Illinois so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Orthopaedic Hand Surgery Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Showalter.
One of 87 Orthopaedic Hand Surgery Physician providers enrolled in Illinois, 5 are shown here.
Dr. Joon Ahn
M.D.
Mount Vernon, IL
Dr. Prasant Atluri
MD
Arlington Heights, IL
Dr. Taizoon Baxamusa
MD
Morton Grove, IL
Dr. William Baylis
D.O.
Palos Heights, IL
Dr. Michael Bednar
MD
Maywood, IL
Compare Orthopaedic Hand Surgery Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is John Showalter, MD's specialty? ▼
John Showalter, MD specializes in Orthopaedic Hand Surgery Physician and practices in Warrenville, Illinois. Credentials: MD.
Where is John Showalter, MD located? ▼
John Showalter, MD is located at 27650 FERRY RD, Warrenville, IL, 60555. Phone: (630) 225-2663.
What is John Showalter, MD's NPI number? ▼
John Showalter, MD's National Provider Identifier (NPI) is 1285623488, issued on 10/19/2005.
How many Orthopaedic Hand Surgery Physician providers are there in the US? ▼
There are 2,013 Orthopaedic Hand Surgery Physician providers across 52 states in the US. The average Orthopaedic Hand Surgery Physician provider writes 185 Medicare Part D claims per year.
Does John Showalter, MD accept Medicare? ▼
John Showalter, MD appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Showalter, MD's credentials? ▼
John Showalter, MD's NPI is 1285623488 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.
- 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.