Dr. David M. Barker, MD
OB-GYN (Obstetrics & Gynecology) (Obstetrics & Gynecology Physician)
- Medicare participating
At a glance
- Medical school
- University of Tennessee, Hsc, College of Medicine (1999)
- Years since graduation
- 27
- In the NPI registry since
- 2005
- Medicare patients seen, 2024
- 116
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1999Medical school: University of Tennessee, Hsc, College of Medicine
- 2005Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Obstetrics & Gynecology Physician primary
TN license 37131
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Map: OB-GYN (Obstetrics & Gynecology) per capita by county →
Where they work
Hospitals
- Memorial Healthcare System, Inc Chattanooga, TN
- Erlanger Medical Center Chattanooga, TN
- Parkridge Medical Center Chattanooga, TN
Medical groups
- Galen Medical Group, PC (125 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 116
- Services billed
- 273
- Patients’ average age
- 71
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 20-29 minutes | 82 | 49 |
| Cervical or vaginal cancer screening; pelvic and clinical breast examination | 45 | 45 |
| Automated urinalysis test | 34 | 17 |
| Established patient office or other outpatient visit, 30-39 minutes | 30 | 29 |
| Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory | 20 | 20 |
| Smear for infectious agents | 19 | 16 |
| New patient office or other outpatient visit, 30-44 minutes | 14 | 14 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Clobetasol Propionate Other prescribers in Chattanooga, TN | 15 |
| Valacyclovir (valacyclovir hcl) Other prescribers in Chattanooga, TN | 13 |
| Estradiol Other prescribers in Chattanooga, TN | 12 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 15 companies reported 42 payments worth $832 in total to this clinician.
| Sage Therapeutics, LLC | $233 |
|---|---|
| Supernus Pharmaceuticals, Inc. | $103 |
| Millicent US Inc | $85.90 |
| Novo Nordisk Inc | $71.05 |
| Bayer HealthCare Pharmaceuticals Inc. | $69.70 |
| Sumitomo Pharma America, Inc. | $54.32 |
| Astellas Pharma US Inc | $46.70 |
| Mayne Pharma Commercial LLC | $43.46 |
| Food and Beverage | $832 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.
Industry-funded research
Named as a principal investigator on 3 industry-funded studies in 2025, from 3 companies. The companies reported $123,415 in research payments for these studies, mostly to the institutions running them.
- Evaulation of the dexcom continuous glucose monitoring system in pregnancy
Dexcom, Inc. - Study name not reported
Organon Llc - A phase 1/2, randomized, observer-blinded, multi-country study to eval
GlaxoSmithKline, LLC.
From CMS Open Payments research payments, where companies name up to five principal investigators per payment. Research payments usually go to hospitals, universities and research sites, not to the investigator personally. A payment is not evidence of wrongdoing.