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Edit this profileAt a glance
- 3535 N Fourth St Ste 400, Longview, TX 75605
About Dr. Wallis
Mark S. Wallis, M.D. practices dermatology in Longview, TX. Mark is a 1988 graduate of University of Texas Medical School at San Antonio. Mark is also listed as specializing in dermatopathology, pediatric dermatology, and mohs surgery / dermatologic surgery. Medicare claims data shows Mark provided 10,990 services to 3,133 patients. The services billed most often include aminolevulinic acid hcl for topical administration, 10% gel, 10 mg, pathology examination of tissue using a microscope, intermediate complexity, and destruction of precancer skin growth, 2-14 growths. The provider's National Provider Identifier (NPI) is 1861489049.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (903) 757-3881
- Email not available
Practice Locations
3535 N FOURTH ST STE 400
Longview, TX 75605
Conditions Commonly Evaluated or Treated
Within Dermatology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Acne and follicular disorders
Eczema and inflammatory skin disease
Infections and infestations
Pigment, growths, and benign lesions
Skin cancer
Urticaria, itch, and vascular
Autoimmune and connective tissue
Infections
Rashes & allergy
Skin growths
Procedures & services
Most searched procedures
Diagnostic procedures
Lesion treatment
- Complex skin lesion excision
- Cryotherapy for skin lesions
- Electrodesiccation and curettage
- Incision and drainage of an abscess
Medical dermatology treatment
Cosmetic
Cosmetic and minor surgery
Cosmetic dermatology
Diagnostic
General dermatology
Infections
Medical dermatology
Nails & hair
Skin cancer surgery
Skin growths
Procedures Most Often Billed to Medicare
10,990 services · 3,133 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Destruction of precancer skin growth, 2-14 growths | Procedure | 17003 |
1,383 | More often than most peers in Dermatology |
| Destruction of precancer skin growth, 1 growth | Procedure | 17000 |
317 | More often than most peers in Dermatology |
| Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, 1-5 tissue blocks | Procedure | 17311 |
270 | As often as other peers in Dermatology |
| Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, each additional stage, 1-5 tissue blocks | Procedure | 17312 |
129 | As often as other peers in Dermatology |
| Biopsy of related skin growth, first growth | Procedure | 11102 |
114 | As often as other peers in Dermatology |
| Complicated repair of wound of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet, 2.6-7.5 cm | Procedure | 13132 |
101 | More often than most peers in Dermatology |
| Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm | Procedure | 12032 |
53 | More often than most peers in Dermatology |
| Shaving of skin growth of body, arms, or legs, 0.6-1.0 cm | Procedure | 11301 |
52 | More often than most peers in Dermatology |
| Biopsy of related skin growth, each additional growth | Procedure | 11103 |
49 | As often as other peers in Dermatology |
| Destruction of skin growth, 1-14 growths | Procedure | 17110 |
44 | Less often than most peers in Dermatology |
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 dermatologists 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 dermatologists 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.
Common questions
What kind of doctor is Mark S. Wallis?
Mark S. Wallis is a dermatologist (skin doctor) in Longview, TX. That is the designation recorded for this NPI in the federal registry, where it is listed as “Dermatology”.
NPI registry
What is Mark S. Wallis's address?
Mark S. 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 Mark S. Wallis?
The number on file is (903) 757-3881. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Mark S. Wallis?
Mark S. 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 Mark S. Wallis train?
Mark S. 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 Mark S. Wallis have?
Mark S. 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 Mark S. Wallis perform?
According to Medicare billing data, Mark S. 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 Mark S. Wallis's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Mark S. Wallis. If this is you, claiming it is free.
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