Doctor profile · Federal record
Dr. Mark Day, DO
Family Medicine Physician (CMS: Family Practice) · Las Vegas, NV
- NPI 1164436994
- Accepts Medicare
- 36 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
1655 E Cactus Ave Ste 400
Las Vegas, NV 891837723
(702) 724-8777
fax (702) 724-8749 - Additional location
-
56 N Pecos RD, Ste A
Henderson, NV 890740698
(702) 456-9100
fax (702) 434-7354 - Mailing address
-
Po Box 50698
Henderson, NV 890740698
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- November 6, 2025
- Year of graduation
- 1990 — 36 yrs since
- Specialty taxonomy
- 207Q00000X — NUCC code
- State license (1)
- Nevada #656
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1164436994. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
736
Distinct HCPCS
6
Medicare allowed
$64,166
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 621 | 317 | $90 | |
G0008 |
Administration of influenza virus vaccine | 28 | 28 | $31 | |
90694 |
Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage | 25 | 25 | $75 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 21 | 20 | $14 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 21 | 20 | $127 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 20 | 20 | $128 |
In context: peer comparison
Among 153 peers in this city , average services per provider: 166. This provider delivers 4.4× the peer median.Open Payments
Industry payments received
All-time total
$124
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ABBVIE INC. | 1 | $123.54 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
3,787
Patients
1,238
Total drug cost
$47,958
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 743 | 246 | $8,539 |
| Amlodipine Besylate | Generic | 425 | 134 | $2,443 |
| Levothyroxine Sodium | Generic | 354 | 110 | $6,593 |
| Lisinopril | Generic | 314 | 112 | $2,510 |
| Metformin Hcl | Generic | 286 | 91 | $2,682 |
| Losartan Potassium | Generic | 249 | 76 | $3,717 |
| Rosuvastatin Calcium | Generic | 244 | 81 | $3,420 |
| Omeprazole | Generic | 169 | 62 | $2,468 |
| Hydrochlorothiazide | Generic | 161 | 50 | $794 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 156 | 53 | $3,079 |
Frequently asked questions
What is Dr. Mark Day's medical specialty?
Dr. Mark Day practices Family Medicine Physician in Las Vegas, NV.
Where does Dr. Mark Day practice?
Dr. Mark Day practices at 1655 E Cactus Ave Ste 400, Las Vegas, NV 891837723. Office phone: 7027248777.
What is Dr. Mark Day's NPI?
Dr. Mark Day's National Provider Identifier (NPI) is 1164436994, issued by NPPES.
Does Dr. Mark Day accept Medicare assignment?
Yes. Dr. Mark Day accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Day commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Administration of influenza virus vaccine (HCPCS G0008); Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage (HCPCS 90694). Source: CMS Medicare Physician & Other Practitioners file.