Physician Profile
Unclaimed ProfileAbout WALLIS
Mark S Wallis, M.D. practises dermatology in Longview, TX. Mark is a 1988 graduate of University of Texas Medical School at San Antonio. Mark is also listed as specialising in dermatopathology, pediatric dermatology, and mohs surgery / dermatologic surgery.
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
Common questions
What kind of doctor is Dr. Wallis?
Dr. Wallis is a dermatology in Longview, TX. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “DERMATOLOGY”.
NPI registry
What is Dr. Wallis's address?
Dr. Wallis is listed at 3535 N FOURTH ST STE 400, Longview, TX 75605. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Wallis?
The number on file is (903) 757-3881. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Wallis?
Dr. Wallis's National Provider Identifier is 1861489049. 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. Wallis train?
Dr. Wallis attended University of Texas Medical School at San Antonio, graduating in 1988. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Wallis have?
Dr. Wallis has 38 years experience. Calculated from a graduation year of 1988, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Wallis perform?
According to Medicare billing data, Dr. Wallis performs procedures including destruction of precancer skin growth, 2-14 growths, destruction of precancer skin growth, 1 growth and removal and microscopic exam of growth of head, neck, hands, feet, or genitals, 1-5 tissue blocks; provides treatments such as injection of drug or substance under skin or into muscle, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Wallis's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Wallis. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (903) 757-3881
- Email not available
Practice Locations
3535 N FOURTH ST STE 400
Longview, TX 75605
Procedures Most Often Billed to Medicare
10,990 services · 3,133 patients · 25 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Destruction of precancer skin growth, 2-14 growths | Procedure | 17003 |
1,383 |
| Destruction of precancer skin growth, 1 growth | Procedure | 17000 |
317 |
| Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, 1-5 tissue blocks | Procedure | 17311 |
270 |
| Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, each additional stage, 1-5 tissue blocks | Procedure | 17312 |
129 |
| Biopsy of related skin growth, first growth | Procedure | 11102 |
114 |
| Complicated repair of wound of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet, 2.6-7.5 cm | Procedure | 13132 |
101 |
| Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm | Procedure | 12032 |
53 |
| Shaving of skin growth of body, arms, or legs, 0.6-1.0 cm | Procedure | 11301 |
52 |
| Biopsy of related skin growth, each additional growth | Procedure | 11103 |
49 |
| Destruction of skin growth, 1-14 growths | Procedure | 17110 |
44 |
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.
Other dermatology specialists at this location 5
Same specialty, same street address — most likely the same department or group.
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.
Other dermatology specialists in Longview 3
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at University of Texas Medical School at San Antonio 8
Other providers in the same specialty who trained at the same institution.
Class of 1988 at University of Texas Medical School at San Antonio 8
Providers who graduated from the same medical school in the same year.
Also performs Destruction of precancer skin growth, 2-14 growths 8
Providers in TX who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.