Physician Profile
Unclaimed ProfileAbout DEMAY
John Mark Demay, MD practices dermatology in Sioux City, IA. John is a 1989 graduate of University of Nebraska College of Medicine. According to Medicare claims data, John cared for 2,536 Medicare patients across 9,685 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (712) 277-9370
- Email not available
Practice Locations
2930 HAMILTON BLVD STE 102
Sioux City, IA 51104
Procedures Most Often Billed to Medicare
9,685 services · 2,536 patients · 22 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Destruction of precancer skin growth, 2-14 growths | Procedure | 17003 |
1,300 |
| Destruction of precancer skin growth, 1 growth | Procedure | 17000 |
556 |
| Biopsy of related skin growth, first growth | Procedure | 11102 |
206 |
| Destruction of cancer skin growth of trunk, arms, or legs, 1.1-2.0 cm | Procedure | 17262 |
50 |
| Biopsy of related skin growth, each additional growth | Procedure | 11103 |
45 |
| Destruction of cancer skin growth of face, ears, eyelids, nose, lips, or mouth, 1.1-2.0 cm | Procedure | 17282 |
21 |
| Destruction of cancer skin growth of scalp, neck, hands, feet, or genitals, 1.1-2.0 cm | Procedure | 17272 |
20 |
| Destruction of skin growth, 1-14 growths | Procedure | 17110 |
20 |
| Biopsy of ear | Procedure | 69100 |
14 |
| Destruction of cancer skin growth of face, ears, eyelids, nose, lips, or mouth, 0.6-1.0 cm | Procedure | 17281 |
13 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Trained at University of Nebraska College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1989 at University of Nebraska College of Medicine 8
Providers who graduated from the same medical school in the same year.
More connections — 8 related providers in 1 group
Also performs Destruction of precancer skin growth, 2-14 growths 8
Providers in IA who bill this service to Medicare most often.
Common questions
What does Dr. Demay specialize in?
Dr. Demay is a dermatology in Sioux City, IA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “DERMATOLOGY”.
NPI registry
Where is Dr. Demay located?
Dr. Demay is listed at 2930 HAMILTON BLVD STE 102, Sioux City, IA 51104. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Demay's phone number?
The number on file is (712) 277-9370. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Demay's NPI number?
Dr. Demay's National Provider Identifier is 1366447294. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Demay go to medical school?
Dr. Demay attended University of Nebraska College of Medicine, graduating in 1989. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Demay been practicing?
Dr. Demay has 37 years experience. Calculated from a graduation year of 1989, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Demay do most often?
According to Medicare billing data, Dr. Demay performs procedures including destruction of precancer skin growth, 2-14 growths, destruction of precancer skin growth, 1 growth and biopsy of related skin growth, first growth; reads or performs imaging such as obtaining data needed to develop the optimal radiation treatment, 1 treatment area and superficial and/or low voltage radiation treatment delivery, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Demay confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Demay. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.