NPI age
19 years
Enumerated 2006-08-07
● Active
Type 1 · Individual
DR. Charles Mark Chassay, M.D.
Chassay is 1 of 16 family medicine providers in Fort Worth and 1 of 251 in Texas.
Primary specialty
Family Medicine
Plus 1 subspecialty
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2020-11-13
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 251 active family medicine providers in Texas.
NPI age
19 years
↑ 7 yr above median (12 yr)
State licenses
1 state
14% of peers hold multiple states
Subspecialties
1
In the 49% of peers with subspecialties
NPI lifetime · 2006 → 2026
2006-08Enumerated in NPPES
2006
2026
Where they practice
Practice location
855 Montgomery St
Fort Worth, TX 761072553
Mailing address
855 Montgomery St
Fort Worth, TX 761072553
Specialties
-
Family Medicine PrimaryA family medicine physician that is trained to be responsible for continuous care in the field of sports medicine, not only for the enhancement of health and fitness, but also for the prevention of injury and illness. A sports medicine...
-
Family MedicineFamily Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of...
Practice context
Part of a multi-provider practice. 237 other active providers share this practice address in NPPES.
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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.