Mark David Koone, MD
Dermatology Physician · Sherman, TX
Mark David Koone, MD is a dermatology physician with a practice address in Sherman, Texas, and NPI 1720055833, issued on Mar 7, 2006. Check the license (Texas H1976, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark David Koone
- Credential
- MD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- H1976 TX
Self-reported in NPPES; status is on the state search - Practice location
- 230 E Sycamore St Ste 305, Sherman, TX 75090
- Phone
- (903) 771-4613
- Enumerated
- Mar 7, 2006
- Record last updated
- Jul 29, 2025
- Fax
- (903) 698-6376
- Medicare enrollment
- Enrolled (PECOS I20101221001189); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 1982
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 1,172 in Texas → Look up another NPI →
Also registered at 230 E Sycamore St Ste 305
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Hollis Adams, FNP-BCFamily Nurse Practitioner1962188839
- Matthew Helm, MDDermatology Physician1346583150
Verify Mark David Koone in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license H1976Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% more Medicare Part D claims than the average dermatology physician in 2024
1,508 Medicare Part D claims for 572 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Clobetasol Propionate179 claims
- Hydrocortisone165 claims
- Ketoconazole152 claims
- Triamcinolone Acetonide140 claims
- Doxycycline Hyclate108 claims
- Mometasone Furoate91 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 MIPS final score for 2023 (Medicare payment program): 95.8 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,575.62
75 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 10,250 providers of this specialty with any payment received $8,544.61 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
- Pdp OF Texas, PLLCSherman, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark David Koone among 1,172 dermatology physician records in Texas
Mark David Koone, MD is one of 1,172 dermatology physician records with a practice address in Texas. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 63% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated1982 · median 2008 among the 926 with a school on file
- Record last updated2025 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in Texas
There are 1,172 dermatology physician records in Texas.
All 1,172 in Texas → Every provider in Sherman → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Matthew Helm, MDSherman, TX 750901346583150
- Clint Moss, MDSherman, TX 750901578726352
- Theresa Vo, M.D.Rowlett, TX 750881437592151
- Daniel Achtman, M.D.Plano, TX 750931255389102
- Michael Golden, M.D.Plano, TX 750931356393888
- Karen Houpt, MDPlano, TX 750931336108463
- Stanferd Kusch, M.D.Plano, TX 750931609981687
- Karen Lund, M.D.Plano, TX 750931225021645
Common questions
What is Mark David Koone, MD's NPI number?
Mark David Koone, MD's National Provider Identifier (NPI) is 1720055833, issued on Mar 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark David Koone, MD located?
The NPPES record lists a practice address at 230 E Sycamore St Ste 305, Sherman, TX, 75090. Phone: (903) 771-4613. Providers update this record themselves, so call before visiting.
How can I verify Mark David Koone, MD's license?
NPPES lists Texas license number H1976, 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 David Koone, MD prescribe under Medicare Part D?
In 2024, Mark David Koone, MD had 1,508 Medicare Part D claims for 572 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
What is Mark David Koone, MD's MIPS final score?
The 2023 MIPS final score is 95.8 of 100. 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.