Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Tammy A O'Brien, MD

Individual provider Family Medicine Physician · NPI 1184703571

Dr. Tammy A O'Brien, MD is a Family Practice in Cedar Rapids, Iowa. Graduated from University of Iowa, Rj & L Carver College of Medicine in 1995, 31 years ago. Practices with Progressive Rehabilitation Associates LLC, a 273-clinician group and accepts Medicare assignment. Licensed in Iowa.

Years since qualifying
31
Trained at
University of Iowa, Rj & L Carver College of Medicine
Licensed in
IA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

500 8th Ave SE
Cedar Rapids, IA 52401-2134
Phone: (319) 364-8704
Fax: (319) 365-7747
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 31465 (IA)

Record details

NPI number1184703571
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 4, 2006
Last updated in NPPESJuly 25, 2023
Certification dateJuly 25, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF IOWA, RJ & L CARVER COLLEGE OF MEDICINE
Graduated 1995 (31 years in practice)
Group practice Progressive Rehabilitation Associates Llc — 273 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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