John Leuthner, M.D.
NPI 1851737779 · Physical Medicine & Rehabilitation Physician · Fox Lake, IL
Enrolled with Medicare as Practitioner - Physical Medicine and Rehabilitation · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Leuthner, M.D. is a Physical Medicine & Rehabilitation Physician provider in Fox Lake, IL (NPI 1851737779).
Provider details
- NPI number
- 1851737779
- Entity type
- Individual
- Primary specialty
- Physical Medicine & Rehabilitation PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 01078547 (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
5,524 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 2,674 | $107 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 1,065 | $74 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 414 | $63 |
| Chronic Care Management Services for Two Or More Chronic Conditions, Additional 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99439 | 259 | $48 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More99306 | 217 | $183 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 265 | 57 |
| Tizanidine Hcl | 119 | 44 |
| Dexamethasone Sodium Phosphate | 27 | 19 |
| Baclofen | 16 | — |
| Diclofenac Sodium | 12 | — |
| Atorvastatin Calcium | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (3)
- 815 E Irving Park RdStreamwood, IL 60107-3073Phone: (877) 749-7428Fax: (512) 628-3314
- 2200 Randallia DrFort Wayne, IN 46805-4638Phone: (260) 373-4538
- 7901 BroadwayElmhurst, NY 11373-1329Phone: (718) 334-4000
Registry dates
- Enumerated
- 2013-05-18
- Last updated
- 2024-08-23
- Certified
- 2024-08-23
Frequently asked questions
- What is John Leuthner's NPI number?
- John Leuthner's National Provider Identifier (NPI) is 1851737779, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Leuthner's specialty?
- John Leuthner is listed in the NPPES registry with a primary specialty of Physical Medicine & Rehabilitation Physician (Allopathic & Osteopathic Physicians).
- Where is John Leuthner located?
- John Leuthner's practice location on file with NPPES is 256 E Grand Ave, Fox Lake, IL 60020-1684.
- What is John Leuthner's phone number?
- The practice phone number listed in the NPPES registry for John Leuthner is (847) 370-6712.
- Does John Leuthner accept Medicare?
- John Leuthner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Leuthner's NPI active?
- Yes — John Leuthner's NPI (1851737779) is active in the NPPES registry as of the last update on 2024-08-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.