John Demay, MD
NPI 1366447294 · Dermatology Physician · Sioux City, IA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Demay, MD is a Dermatology Physician provider in Sioux City, IA (NPI 1366447294).
Provider details
- NPI number
- 1366447294
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 31906 (IA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
21 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
9,685 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Ultrasonic Guidance for Placement of Radiation Therapy FieldsG6001 | 1,660 | $162 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 1,646 | $84 |
| Obtaining Data Needed to Develop the Optimal Radiation Treatment, 1 Treatment Area77280 | 1,634 | $243 |
| Superficial And/Or Low Voltage Radiation Treatment Delivery77401 | 1,579 | $37 |
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 1,300 | $6 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 556 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Triamcinolone Acetonide | 162 | 109 |
| Amoxicillin | 138 | 77 |
| Gentamicin Sulfate | 52 | 38 |
| Clobetasol Propionate | 51 | 30 |
| Clindamycin Phosphate | 40 | 13 |
| Valacyclovir Hclbrand: Valacyclovir | 32 | 13 |
| Metronidazole | 29 | 20 |
| Cephalexin | 25 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$118 across 7 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-16
- Last updated
- 2016-08-16
Frequently asked questions
- What is John Demay's NPI number?
- John Demay's National Provider Identifier (NPI) is 1366447294, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Demay's specialty?
- John Demay is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is John Demay located?
- John Demay's practice location on file with NPPES is 2930 Hamilton Blvd, Sioux City, IA 51104-2431.
- What is John Demay's phone number?
- The practice phone number listed in the NPPES registry for John Demay is (712) 277-9370.
- Does John Demay accept Medicare?
- John Demay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Demay's NPI active?
- Yes — John Demay's NPI (1366447294) is active in the NPPES registry as of the last update on 2016-08-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.