Dr. Daniel C. Grinnan, M.D.
Pulmonology (Pulmonary Disease Physician)
1250 E Marshall Street, Internal Medicine Pulmonary
Richmond, VA 23298
- Medicare participating
At a glance
- Medical school
- Virginia Commonwealth University, School of Medicine (2000)
- Years since graduation
- 26
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 343
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
- 2000Medical school: Virginia Commonwealth University, School of Medicine
- 2006Registered 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
-
Pulmonary Disease Physician primary
VA license 0101234411
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Medical College of Virginia Hospitals Richmond, VA
- Vcu Health Tappahannock Hospital Tappahannock, VA
- Community Memorial Hospital South Hill, VA
Medical groups
- Mcv Associated Physicians (1,807 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
- 343
- Services billed
- 1,099
- Patients’ average age
- 72
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 30-39 minutes | 289 | 160 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 118 | 55 |
| Critical care, first 30-74 minutes | 62 | 28 |
| Established patient office or other outpatient visit, 40-54 minutes | 61 | 50 |
| Established patient office or other outpatient visit, 20-29 minutes | 49 | 45 |
| Test to examine how well the lungs exchange gases | 48 | 48 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 38 | 25 |
| Test to determine lung volumes using sensors | 34 | 34 |
| Test to measure rate of airflow | 25 | 25 |
| New patient office or other outpatient visit, 45-59 minutes | 18 | 18 |
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 |
|---|---|
| Azithromycin Other prescribers in Richmond, VA | 246 |
| Albuterol Sulfate Hfa (albuterol sulfate) Other prescribers in Richmond, VA | 203 |
| Trelegy Ellipta (fluticasone/umeclidin/vilanter) Other prescribers in Richmond, VA | 173 |
| Montelukast Sodium Other prescribers in Richmond, VA | 170 |
| Prednisone Other prescribers in Richmond, VA | 163 |
| Sildenafil Citrate Other prescribers in Richmond, VA | 150 |
| Jardiance (empagliflozin) Other prescribers in Richmond, VA | 147 |
| Spironolactone Other prescribers in Richmond, VA | 126 |
| Uptravi (selexipag) | 94 |
| Breo Ellipta (fluticasone/vilanterol) Other prescribers in Richmond, VA | 92 |
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, 2 companies reported 2 payments worth $109 in total to this clinician.
| United Therapeutics Corporation | $90.86 |
|---|---|
| Sandoz Inc. | $17.84 |
| Food and Beverage | $109 |
|---|
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 1 industry-funded study in 2025, from 1 company. The companies reported $5,648 in research payments for these studies, mostly to the institutions running them.
- BAY 632521, RiOciguAt UseRs Registry The ROAR registry
Bayer HealthCare Pharmaceuticals Inc.
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.