Mark J. Fleschler, M.D.
Geriatric Medicine (Internal Medicine) Physician · Dallas, TX
Mark J. Fleschler, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Dallas, Texas, and NPI 1083652986, issued on Jun 3, 2006. Check the license (Texas G8110, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark J. Fleschler
- Credential
- M.D.
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License number
- G8110 TX
Self-reported in NPPES; status is on the state search - Practice location
- 8230 Walnut Hill LN Ste 800, Dallas, TX 75231
- Phone
- (214) 345-1220
- Enumerated
- Jun 3, 2006
- Record last updated
- Jul 21, 2022
- Fax
- (214) 750-2998
- Medicaid ID
- 089501301 TX
- Medicare enrollment
- Enrolled (PECOS I20100415000482); accepts Medicare assignment
- Medical or professional school
- University Of Texas Southwestern Medical School At Dallas, 1984
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 256 in Texas → Look up another NPI →
Verify Mark J. Fleschler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license G8110Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% more Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
6,342 Medicare Part D claims for 362 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 52 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium391 claims
- Atorvastatin Calcium292 claims
- Levothyroxine Sodium260 claims
- Amlodipine Besylate199 claims
- Ezetimibe173 claims
- Olmesartan Medoxomil147 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.
Bills Medicare through one group practice
- Fleschler And Phillips Medical Group LLCDallas, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark J. Fleschler among 256 geriatric medicine (internal medicine) physician records in Texas
Mark J. Fleschler, M.D. is one of 256 geriatric medicine (internal medicine) physician records with a practice address in Texas. 71% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 44% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated1984 · median 2000 among the 143 with a school on file
- Record last updated2022 · 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 207RG0300X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in Texas
There are 256 geriatric medicine (internal medicine) physician records in Texas.
All 256 in Texas → Every provider in Dallas → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Jennifer AdamsDallas, TX 752311902546054
- Neerja Bhardwaj, MD, MPHDallas, TX 752311194837716
- Diana Kerwin, MDDallas, TX 752311750335097
- David Crawford, MDDallas, TX 752351003490434
- Robert Haddox, MDDallas, TX 752351770518896
- Harold Wagner, D.O.Dallas, TX 752371114015138
- Soroush Behnam, MDDallas, TX 752431710908744
- Anita Aisner, M.D.Dallas, TX 752441891900460
Common questions
What is Mark J. Fleschler, M.D.'s NPI number?
Mark J. Fleschler, M.D.'s National Provider Identifier (NPI) is 1083652986, issued on Jun 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark J. Fleschler, M.D. located?
The NPPES record lists a practice address at 8230 Walnut Hill LN Ste 800, Dallas, TX, 75231. Phone: (214) 345-1220. Providers update this record themselves, so call before visiting.
How can I verify Mark J. Fleschler, M.D.'s license?
NPPES lists Texas license number G8110, 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 J. Fleschler, M.D. prescribe under Medicare Part D?
In 2024, Mark J. Fleschler, M.D. had 6,342 Medicare Part D claims for 362 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. Part D covers Medicare prescriptions only.
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.