John Mcmahan, MD
NPI 1518910272 · Otolaryngology Physician · Appleton, WI
Enrolled with Medicare as Practitioner - Otolaryngology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Mcmahan, MD is a Otolaryngology Physician provider in Appleton, WI (NPI 1518910272).
Provider details
- NPI number
- 1518910272
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036051277 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
222 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 46 | $97 |
| Ct Scan of Face Without Contrast70486 | 38 | $110 |
| Diagnostic Exam of Nasal Passages Using an Endoscope31231 | 34 | $203 |
| Telephone Medical Discussion With Physician, 5-10 Minutes99441 | 24 | $60 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 22 | $58 |
| Diagnostic Exam of Voice Box Using a Flexible Endoscope31575 | 17 | $140 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 124 | 71 |
| Montelukast Sodium | 93 | 47 |
| Fluticasone Propionate | 80 | 45 |
| Prednisone | 42 | 39 |
| Azelastine Hcl | 36 | 25 |
| Pantoprazole Sodium | 28 | 16 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 24 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-17
- Last updated
- 2025-04-01
- Certified
- 2025-04-01
Frequently asked questions
- What is John Mcmahan's NPI number?
- John Mcmahan's National Provider Identifier (NPI) is 1518910272, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Mcmahan's specialty?
- John Mcmahan is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is John Mcmahan located?
- John Mcmahan's practice location on file with NPPES is 247 S Nicolet Rd, Appleton, WI 54914-3938.
- What is John Mcmahan's phone number?
- The practice phone number listed in the NPPES registry for John Mcmahan is (888) 938-3838.
- Does John Mcmahan accept Medicare?
- John Mcmahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Mcmahan's NPI active?
- Yes — John Mcmahan's NPI (1518910272) is active in the NPPES registry as of the last update on 2025-04-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.