Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Robert James Armstrong, DO

Individual provider Family Medicine Physician · NPI 1891148847

Robert James Armstrong, DO is registered under Family Practice in Nashville, Tennessee. Graduated from Touro Un College of Osteopathic Medicine, Vallejo in 2016, 10 years ago. Practices with Vanderbilt University Medical Center, a 3,466-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California and Tennessee.

Years since qualifying
10
Trained at
Touro Un College of Osteopathic Medicine, Vallejo
Licensed in
CA, TN
In the registry since
2016
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

3601 The Vanderbilt Clinic
Nashville, TN 37232-2168
Phone: (615) 322-3000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1450 Treat Blvd # 160, Walnut Creek, CA 94597-2168 — (925) 296-9000

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 5702 (TN)
Family Medicine Physician Taxonomy 207Q00000X · Licence 20A15772 (CA)

Record details

NPI number1891148847
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 14, 2016
Last updated in NPPESAugust 14, 2024
Certification dateAugust 14, 2024

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolTOURO UN COLLEGE OF OSTEOPATHIC MEDICINE, VALLEJO
Graduated 2016 (10 years in practice)
Group practice Vanderbilt University Medical Center — 3466 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of skin lesions 1–10 times
Removal or shaving of skin growth 1–10 times
Skin biopsy 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients65
Services billed 247 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Vanderbilt University Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3466 clinicians in the practice; 12 are shown here.

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