NPI age
17 years
Enumerated 2009-04-10
● Active
Type 1 · Individual
DR. Margaret Marie John, DC
John is 1 of 12 chiropractor providers in Argyle and 1 of 10819 in Texas.
Primary specialty
Chiropractor
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2019-06-04
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 10819 active chiropractor providers in Texas.
NPI age
17 years
↑ 2 yr above median (15 yr)
State licenses
1 state
2% of peers hold multiple states
Subspecialties
0
7% of peers hold subspecialties
NPI lifetime · 2009 → 2026
2009-04Enumerated in NPPES
2009
2026
Where they practice
Practice location
306 Us Hwy 377 Ste J
Argyle, TX 762263958
Mailing address
306 Us Hwy 377 Ste J
Argyle, TX 762263958
Specialties
-
Chiropractor PrimaryA provider qualified by a Doctor of Chiropractic (D.C.), licensed by the State and who practices chiropractic medicine -that discipline within the healing arts which deals with the nervous system and its relationship to the spinal...
Practice context
Solo or small practice. No other active providers share this practice address in NPPES. This provider is listed as a sole proprietor.
Recently enumerated nearby: 2 new chiropractor providers have been added in Argyle in the last 180 days.
See all →
Provyx · Custom healthcare lists
Need all 10819 Chiropractor providers in Texas?
Provyx verifies the list to your scope. Business emails and direct lines are looked up at delivery, validated, and not stored.
Request a quote →How to verify this provider
- 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.