William A. Grass, ARNP
Nurse Practitioners (Critical Care Medicine Nurse Practitioner)
10 Barnes West Dr
Creve Coeur, MO 63141
Who else practices at this address →
St. Louis County includes dental (1% of residents) shortage areas. About shortage areas
At a glance
- In the NPI registry since
- 2005
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
- 2005Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Medicare’s Care Compare data doesn’t list this clinician’s medical school. 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
-
Critical Care Medicine Nurse Practitioner primary
FL license ARNP9207097
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Prednisone Other prescribers in Creve Coeur, MO | 21 |
| Gabapentin Other prescribers in Creve Coeur, MO | 16 |
| Methylprednisolone Other prescribers in Creve Coeur, MO | 13 |
| Azithromycin Other prescribers in Creve Coeur, MO | 11 |
| Ciprofloxacin Hcl Other prescribers in Creve Coeur, MO | 11 |
| Dexamethasone Other prescribers in Creve Coeur, MO | 11 |
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, 22 companies reported 27 payments worth $645 in total to this clinician.
| Celgene Corporation | $86.44 |
|---|---|
| Daiichi Sankyo Inc. | $44.61 |
| AbbVie Inc. | $39.87 |
| Incyte Corporation | $39.28 |
| Takeda Pharmaceuticals U.S.A., Inc. | $34.02 |
| Pharmaessentia USA Corporation | $33.92 |
| Springworks Therapeutics, Inc. | $31.75 |
| AstraZeneca Pharmaceuticals LP | $29.50 |
| Food and Beverage | $645 |
|---|
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.