Doctor profile · Federal record
Dr. William Greiser, MD
Emergency Medicine Physician · Trinidad, CO
- NPI 1720114408
- 19 yrs on file
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
410 Benedicta Ave
Trinidad, CO 810822005
(800) 893-9698 - Mailing address
-
200 Corporate Blvd, Ste 201
Lafayette, LA 705083870
Credentials & registration
- NPI registered
- February 2007 — 19 yrs on file
- Profile last updated
- July 8, 2007
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- Colorado #36079
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1720114408. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
33
Distinct HCPCS
2
Medicare allowed
$4,771
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 18 | 18 | $169 | |
99284 |
Emergency department visit with moderate level of medical decision making | 15 | 14 | $116 |
In context: peer comparison
Among 1 peers in this city , average services per provider: 16. This provider delivers 2.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
110
Patients
41
Total drug cost
$2,462
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Oxycodone Hcl | Generic | 75 | 11 | $1,980 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 24 | 19 | $448 |
| Prednisone | Generic | 11 | 11 | $34 |
Frequently asked questions
What is Dr. William Greiser's medical specialty?
Dr. William Greiser practices Emergency Medicine Physician in Trinidad, CO.
Where does Dr. William Greiser practice?
Dr. William Greiser practices at 410 Benedicta Ave, Trinidad, CO 810822005. Office phone: 8008939698.
What is Dr. William Greiser's NPI?
Dr. William Greiser's National Provider Identifier (NPI) is 1720114408, issued by NPPES.
What procedures does Dr. William Greiser commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with moderate level of medical decision making (HCPCS 99284). Source: CMS Medicare Physician & Other Practitioners file.