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MARK DAY DO
NPI 1164436994
Family Medicine in Las Vegas, NV

Active since July 28, 2006PECOS EnrolledAccepts Medicare Assignment
1655 E CACTUS AVE STE 400, LAS VEGAS, NV 89183(702) 724-8777(702) 724-8749 Get Directions Write a Review

NPPES record last updated: November 6, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Mark Day Do NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARK DAY DO (NPI 1164436994) is an individual family medicine provider in Las Vegas, Nevada, licensed in Nevada (656) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Summerlin Hospital Medical Center, and maintains a secondary practice location in Henderson.

NPPES Registry Identity

NPI1164436994
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameMARK DAYCredential: DO
Location Address1655 E CACTUS AVE STE 400Las Vegas, NV 89183-7723
Mailing AddressPo Box 50698Henderson, NV 89074-0698 · (702) 456-9100 · Fax (702) 434-7354
Phone(702) 724-8777
Fax(702) 724-8749
Sole ProprietorNo
Medical School CMSDes Moines University Of Osteopathic Medicine And Health SciencesGraduated 1990
Enumeration DateJuly 28, 2006
Last NPPES UpdateNovember 6, 2025
NPPES CertifiedNovember 6, 2025
✔ NPI 1164436994 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in NV · 656
Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

1655 E CACTUS AVE STE 400, Las Vegas, NV 89183
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Secondary Practice Location 1

Location 156 N Pecos Rd, Ste AHenderson, NV 89074-0698 · Phone (702) 456-9100 · Fax (702) 434-7354

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mark Day Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID547386807
PECOS Enrollment IDI20100924000328
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 7

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
619 services322 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
20 services19 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
19 services18 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000
An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.
17 services17 patients
Removal of deep lymph nodes of neck 38542
This procedure involves removing lymph nodes in the neck to treat or prevent disease spread. It's often related to cancer care. The surgeon makes an incision, removes the nodes, and then closes the incision. Afterwards, some discomfort and swelling may occur.
15 services15 patients
Removal or exploration of parathyroid glands 60500
The procedure for removal or exploration of parathyroid glands involves a surgeon making a small incision in the neck to locate and remove one or more of the tiny parathyroid glands. These glands control calcium levels in the body. This procedure helps treat conditions like hyperparathyroidism.
14 services14 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Summerlin Hospital Medical Center

Acute Care Hospitals · Las Vegas, NV
2/5 CMS rating
OwnershipProprietary
CMS Certification Number290041
Location657 Town Center DriveLas Vegas, NV 89144 · Clark County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 89183 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$88.51 typical visit price
range $57.07 – $173.24
Typical copayment $22.12 (range $14.26 – $43.31)
Most-billed visit code 99203
Established Patient
$100.60 typical visit price
range $18.27 – $140.96
Typical copayment $25.15 (range $4.56 – $35.24)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap A7034
DME-Other DME · category DE001N
4 suppliers15 claims15 services$46.42 avg. paid by Medicare
Tubing used with positive airway pressure device A7037
DME-Other DME · category DE001N
4 suppliers11 claims11 services$10.13 avg. paid by Medicare
Filter, disposable, used with positive airway pressure device A7038
DME-Other DME · category DE001N
5 suppliers12 claims72 services$1.80 avg. paid by Medicare
Standard wheelchair K0001
DME-Wheelchairs · category DD000N
1 supplier12 claims12 services$13.05 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PAIGE CEJKA
Physician Assistant
1655 E CACTUS AVE STE 400
LAS VEGAS, NV 89183
Clark County (702) 724-8777
ERUM KARAFA PA-C
Physician Assistant
1655 E CACTUS AVE STE 400
LAS VEGAS, NV 89183
Clark County (702) 724-8777
JOOBIN PARK M.D.
Internal Medicine
1655 E CACTUS AVE STE 400
LAS VEGAS, NV 89183
Clark County (702) 724-8777

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Day's NPI number?

The NPI number for Mark Day is 1164436994. It was assigned to this individual provider in the NPPES registry on July 28, 2006.

Where is Mark Day located?

Mark Day practices at 1655 E Cactus Ave Ste 400, Las Vegas, NV 89183. The listed phone number is (702) 724-8777.

What is Mark Day's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Mark Day enrolled in Medicare?

Yes. Mark Day is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Mark Day affiliated with any hospitals?

According to CMS data, Mark Day is affiliated with Summerlin Hospital Medical Center.

When was this NPI record last updated?

The NPPES record for Mark Day was last updated on November 6, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.