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GREGORY YIM
NPI 1215513635
Emergency Medicine in Las Vegas, NV

Active since March 24, 2021PECOS EnrolledAccepts Medicare Assignment
3100 N. TENAYA WAY, GRADUATE MEDICAL EDUCATION, LAS VEGAS, NV 89128(702) 962-9551 Get Directions Write a Review

NPPES record last updated: July 22, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 22, 2024, Mar 24, 2021 (2 updates tracked since 2021).

About Gregory Yim NPPES

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

GREGORY YIM (NPI 1215513635) is an individual emergency medicine provider in Las Vegas, Nevada, licensed in Nevada (DO3501) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS, is affiliated with Mountainview Hospital, and is a graduate of Touro Un Col Of Osteopathic Medicine, New York (2021).

NPPES Registry Identity

NPI1215513635
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameGREGORY YIM
Location Address3100 N. TENAYA WAY, GRADUATE MEDICAL EDUCATIONLas Vegas, NV 89128-0431
Mailing Address3100 N. Tenaya Way, Graduate Medical EducationLas Vegas, NV 89128-0431 · (702) 962-9551
Phone(702) 962-9551
Sole ProprietorNo
Medical School CMSTouro Un Col Of Osteopathic Medicine, New YorkGraduated 2021
Enumeration DateMarch 24, 2021
Last NPPES UpdateJuly 22, 20242 updates tracked since enumeration
NPPES CertifiedJuly 22, 2024
✔ NPI 1215513635 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in NV · DO3501✔ Licensed in AZ · 010750
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
3100 N. TENAYA WAY, Las Vegas, NV 89128
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Arizona.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Gregory Yim 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 ID6002210242
PECOS Enrollment IDI20240104003124
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.

Medicare Billing Reassignments

3

Medicare enrollment records show Gregory Yim reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Fremont Emergency Services Scherr Ltd
0.2 mi
Emergency Medicine
3100 N TENAYA WAY
Las Vegas, NV 89128
  • Reassigned Medicare billing, Nevada enrollment
  • 304 clinicians in this Medicare group
NPI 1366429821 (702) 255-5025
Arizona Emergency Medicine Specialists PC
130 mi
Emergency Medicine
101 CIVIC CENTER LN
Lake Havasu City, AZ 86403
  • Reassigned Medicare billing, Arizona enrollment
  • 58 clinicians in this Medicare group
NPI 1134439706 (928) 855-8185
Emergency Physicians Southwest, PC
280 mi
Emergency Medicine
6644 E BAYWOOD AVE
Mesa, AZ 85206
  • Reassigned Medicare billing, Arizona enrollment
  • 289 clinicians in this Medicare group
NPI 1912053752 (480) 321-2000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
107 services106 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
82 services78 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
37 services37 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
25 services25 patients

Hospital Affiliations CMS Care Compare

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

Mountainview Hospital

Acute Care Hospitals · Las Vegas, NV
4/5 CMS rating
OwnershipProprietary
CMS Certification Number290039
Location3100 N Tenaya WayLas Vegas, NV 89128 · Clark County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 89128 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.

Other Providers at the Same Location NPPES 17

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

SARA JARATANIAN MD
Student in an Organized Health Care Education/Training Program
3100 N. TENAYA WAY
LAS VEGAS, NV 89128
Clark County (323) 790-9338
DR. ABDUL GADER GHERIANI
Internal Medicine (Gastroenterology)
3100 N. TENAYA WAY, GRADUATE MEDICAL EDUCATION
LAS VEGAS, NV 89128
Clark County (571) 306-9133
ALLISON TURPEN
Emergency Medicine
3100 N. TENAYA WAY, GRADUATE MEDICAL EDUCATION
LAS VEGAS, NV 89128
Clark County (702) 962-9551
JACKSON HOEKSTRA
Student in an Organized Health Care Education/Training Program
3100 N. TENAYA WAY, GRADUATE MEDICAL EDUCATION
LAS VEGAS, NV 89128
Clark County (702) 962-9549
KIMBALL CHARLES KAUFMAN IV DO
Internal Medicine
3100 N. TENAYA WAY, ATTN: GRADUATE MEDICAL EDUCATION
LAS VEGAS, NV 89128
Clark County (702) 962-9549
ROBERT WILLIAM DE MONTE III
Emergency Medicine
3100 N. TENAYA WAY, GRADUATE MEDICAL EDUCATION
LAS VEGAS, NV 89128
Clark County (702) 962-5000
DR. DWYER PATRICK ROCHE DO
Emergency Medicine
3100 N. TENAYA WAY, GRADUATE MEDICAL EDUCATION
LAS VEGAS, NV 89128
Clark County (702) 962-9551
DR. HAYDEN JACOB MAAG DO
Emergency Medicine
3100 N. TENAYA WAY
LAS VEGAS, NV 89128
Clark County (262) 751-6857

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 Gregory Yim's NPI number?

The NPI number for Gregory Yim is 1215513635. It was assigned to this individual provider in the NPPES registry on March 24, 2021.

Where is Gregory Yim located?

Gregory Yim practices at 3100 N. Tenaya Way Graduate Medical Education, Las Vegas, NV 89128. The listed phone number is (702) 962-9551.

What is Gregory Yim's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Gregory Yim enrolled in Medicare?

Yes. Gregory Yim 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.

Which organizations bill Medicare for Gregory Yim's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Yim reassigns Medicare benefits to 3 organizations: Fremont Emergency Services Scherr Ltd (Las Vegas, NV), Arizona Emergency Medicine Specialists PC (Lake Havasu City, AZ) and Emergency Physicians Southwest, PC (Mesa, AZ). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gregory Yim's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Yim accept?

Health plans from Blue Cross Blue Shield of Arizona list Gregory Yim as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Gregory Yim affiliated with any hospitals?

According to CMS data, Gregory Yim is affiliated with Mountainview Hospital.

When was this NPI record last updated?

The NPPES record for Gregory Yim was last updated on July 22, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.