NPI age
19 years
Enumerated 2006-06-03
● Active
Type 1 · Individual
Mark J Fleschler, M.D.
Fleschler is 1 of 46 internal medicine providers in Dallas and 1 of 377 in Texas.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2022-07-21
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 377 active internal medicine providers in Texas.
NPI age
19 years
≈ at median (18 yr)
State licenses
1 state
12% of peers hold multiple states
Subspecialties
1
In the 38% of peers with subspecialties
NPI lifetime · 2006 → 2026
2006-06Enumerated in NPPES
2006
2026
Where they practice
Practice location
8230 Walnut Hill Ln Ste 800
Dallas, TX 752314491
Mailing address
8230 Walnut Hill Ln Ste 800
Dallas, TX 752314491
Specialties
-
Internal Medicine PrimaryAn internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the...
-
Internal MedicineA physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer,...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 089501301 |
Practice context
Part of a multi-provider practice. 1 other active provider shares this practice address in NPPES.
Recently enumerated nearby: 1 new internal medicine provider has been added in Dallas in the last 180 days.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Check the state license is currently active.State licensing boards publish current status; NPPES does not.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.