NPI age
20 years
Enumerated 2006-03-31
● Active
Type 1 · Individual
Frederick Earl Dixon, MD
Dixon is 1 of 2 internal medicine providers in San Marcos and 1 of 114 in Texas.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2019-02-13
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 114 active internal medicine providers in Texas.
NPI age
20 years
↑ 4 yr above median (16 yr)
State licenses
1 state
9% of peers hold multiple states
Subspecialties
1
In the 50% of peers with subspecialties
NPI lifetime · 2006 → 2026
2006-03Enumerated in NPPES
2006
2026
Where they practice
Practice location
326 N Lbj Dr Ste 104
San Marcos, TX 786665624
Mailing address
326 N Lbj Dr Ste 104
San Marcos, TX 786665624
Specialties
-
Internal Medicine PrimaryAn Internist who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physiologic testing, diagnosis, management and prevention of sleep and circadian rhythm disorders....
-
Internal MedicineAn internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
Practice context
Part of a multi-provider practice. 1 other active provider shares 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.