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Dr. Tamara E. Coates, MD

OB-GYN (Obstetrics & Gynecology) (Obstetrics & Gynecology Physician)

  • Medicare participating

At a glance

Years since graduation
35
In the NPI registry since
2005
Medicare patients seen, 2024
41

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

  • 1991Medical school: Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc)
  • 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
    MD license D0043696

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

Medical groups

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
41
Services billed
109
Patients’ average age
73
Most frequent Medicare services, 2023
ServiceTimesPatients
Cervical or vaginal cancer screening; pelvic and clinical breast examination1919
Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory1818
Established patient office or other outpatient visit, 20-29 minutes1714

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

Most prescribed drugs, Medicare Part D 2024
DrugPrescriptions
Estradiol
Other prescribers in Silver Spring, MD
40

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, 12 companies reported 26 payments worth $586 in total to this clinician.

By company
Astellas Pharma US Inc$125
Sumitomo Pharma America, Inc.$102
Hologic Sales and Service, LLC$90.92
Daiichi Sankyo Inc.$69.47
Millicent US Inc$35.73
Gilead Sciences, Inc.$34.65
AbbVie Inc.$28.23
Shield Therapeutics Inc$27.65
By type
Food and Beverage$586

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.

Who received the most in Maryland →

Other OB-GYN (Obstetrics & Gynecology) clinicians in Silver Spring

Sources

NPI registry (CMS NPPES, November 2026; record last updated September 21, 2023), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1740261338. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.