Mark S. Wallis, M.D.
MOHS-Micrographic Surgery Physician · Longview, TX
Mark S. Wallis, M.D. is a mohs-micrographic surgery physician with a practice address in Longview, Texas, and NPI 1861489049, issued on Oct 3, 2005. Check the license (Texas H6685, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark S. Wallis
- Credential
- M.D.
- Primary taxonomy
- MOHS-Micrographic Surgery Physician 207ND0101X
- License number
- H6685 TX
Self-reported in NPPES; status is on the state search - Practice location
- 3535 N Fourth St Ste 400, Longview, TX 75605
- Phone
- (903) 757-3881
- Enumerated
- Oct 3, 2005
- Record last updated
- Mar 7, 2023
- Fax
- (903) 757-5948
- Medicaid ID
- 0898678-03 TX
- Medicare enrollment
- Enrolled (PECOS I20100610000658); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At San Antonio, 1988
- Entity
- Type 1 · individual
8 nearest mohs-micrographic surgery physician records → All 122 in Texas → Look up another NPI →
Also registered at 3535 N Fourth St Ste 400
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Taylor Dickerson, MDDermatology Physician1154825974
- Casey English, APRN-CNPNurse Practitioner1780259135
- Laura Fite, M.D.Dermatology Physician1861750416
- Devor O'Connor, MDDermatology Physician1811566250
- Herold Osborne, P.A-CMedical Physician Assistant1710999727
- Tammi Short, FNP-CNurse Practitioner1538137153
Verify Mark S. Wallis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license H6685Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30% more Medicare Part D claims than the average mohs-micrographic surgery physician in 2024
741 Medicare Part D claims for 346 beneficiaries, against an average of 570 among the 1,396 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Cephalexin103 claims
- Betamethasone Dipropionate70 claims
- Mometasone Furoate63 claims
- Doxycycline Hyclate53 claims
- Ketoconazole31 claims
- Triamcinolone Acetonide30 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 88.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,136.28
112 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 1,074 providers of this specialty with any payment received $4,075.23 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Wallis Dermatology Associates PLLCLongview, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark S. Wallis among 122 mohs-micrographic surgery physician records in Texas
Mark S. Wallis, M.D. is one of 122 mohs-micrographic surgery physician records with a practice address in Texas. 94% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 94% of these records are
- In the CMS Doctors and Clinicians fileYes · 92% of these records are
- Graduated1988 · median 2006 among the 112 with a school on file
- Record last updated2023 · 39% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ND0101X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
MOHS-Micrographic Surgery Physician providers in Texas
There are 122 mohs-micrographic surgery physician records in Texas.
All 122 in Texas → Every provider in Longview → MOHS-Micrographic Surgery Physician nationwide →
The 8 mohs-micrographic surgery physician records with the nearest ZIP codes
- Robert Taylor, MDLongview, TX 756051760441893
- Jason Blaser, MDTyler, TX 757011265477681
- Stephen Beck, MDTyler, TX 757031063490472
- Anthony Greco, M.D., F.A.A.D.Mount Pleasant, TX 754551427058619
- Rajiv Nijhawan, M.D.Dallas, TX 753901952538043
- William Posten, MDDallas, TX 752511497725790
- Trenton Custis, M.D.Dallas, TX 752461356575344
- Frank Saporito, M.D.Dallas, TX 752461679538763
Common questions
What is Mark S. Wallis, M.D.'s NPI number?
Mark S. Wallis, M.D.'s National Provider Identifier (NPI) is 1861489049, issued on Oct 3, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark S. Wallis, M.D. located?
The NPPES record lists a practice address at 3535 N Fourth St Ste 400, Longview, TX, 75605. Phone: (903) 757-3881. Providers update this record themselves, so call before visiting.
How can I verify Mark S. Wallis, M.D.'s license?
NPPES lists Texas license number H6685, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark S. Wallis, M.D. prescribe under Medicare Part D?
In 2024, Mark S. Wallis, M.D. had 741 Medicare Part D claims for 346 beneficiaries; the average among mohs-micrographic surgery physician prescribers was 570. Part D covers Medicare prescriptions only.
What is Mark S. Wallis, M.D.'s MIPS final score?
The 2023 MIPS final score is 88.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.