Dr. Timothy Ian Mackenzie Mercer , MD
Internal Medicine • Austin, TX
Professional Overview & Biography Verified Profile Summary
Dr. Timothy Mercer, MD is a certified Internal Medicine practicing in Austin, TX. With approximately 15 years of clinical experience since graduating from Indiana University School Of Medicine in 2011, Dr. Mercer delivers high-quality medical care to the local community at 1601 TRINITY ST.
Dr. Mercer is affiliated with Seton Family Of Doctors and accepts Medicare assignment.
Frequently performed procedures and clinical services include subsequent hospital care with moderate levelof medical decision making, if using time, at least. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.
Practice Location & Contact Primary Location
1601 Trinity St
Austin, TX 787121765
Medicare Profile & Education
Indiana University School Of Medicine
2011
✓ Accepts Assignment
In-Person Only
Specialty Benchmarks & Practice Insights
Comparative analytics for Internal Medicine in Austin, TX
Practicing in Austin, TX (9538 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Clinical Seniority & Experience Comparison
Performed Procedures & Service Volume
Top Medicare Part B procedures performed by this practitioner
| HCPCS Code & Description | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
|
99233
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
|
24 | 12 | $317.00 | $101.13 |
Medical Specialties & State Licenses
CMS Verified: 2025-07-26NUCC Taxonomy Code: 207R00000X
A 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, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
NUCC Taxonomy Code: 208000000X
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
Hospital & Practice Group Affiliations
Seton Family Of Doctors
1400 N Ih 35, Austin, TX 787011926
Seton Family Of Doctors
1400 N Ih 35 Ll, Austin, TX 787011926
Phone: 5123247300
Seton Family Of Doctors
1500 Red River St, Austin, TX 787011918
Phone: 5123247000
Secondary Practice Locations
5339 N Ih 35 Ste 100
Austin, TX 787232558
Phone: 5129788130
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Otolaryngology
Doctor of Medicine (M.D.)
Dietitian, Registered
RDLD
Social Worker - Clinical
Licensed Clinical Social Worker
Clinical Nurse Specialist - Adult Health
Registered Nurse, ACNSBC
Social Worker - Clinical
Licensed Clinical Social Worker
Podiatrist - Foot & Ankle Surgery
Doctor of Podiatric Medicine
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Registered at 1601 TRINITY ST, AUSTIN, TX 787121765 (Tel: 5129788130)
Registered at 1601 TRINITY ST, AUSTIN, TX 787121765
Pediatrics (License #R4099 in TX)
NPI status registered as active in NPPES database
Registered at 500 E 7TH ST, AUSTIN, TX 787013319 (Tel: 5129789920)
Registered at 500 E 7TH ST, AUSTIN, TX 787013319
Recorded as TIMOTHY MERCER, MD
Pediatrics (License #R4099 in TX)
Internal Medicine (License #R4099 in TX)
NPI status registered as active in NPPES database
Registered at 2301 ERWIN RD, DURHAM, NC 277054699 (Tel: 9196848111)
Registered at 2301 ERWIN RD, DURHAM, NC 277054699 (Tel: 9196848111)
Recorded as TIMOTHY MERCER
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
Patient & Community Reviews
Verified patient ratings, medical care experiences, and facility photos
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NPI Administrative Meta
Mailing Address
1601 Trinity St
Austin, TX 787121765
This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.