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DR. NATALIE TSE-LAN SHUM MD
NPI 1114936358
Emergency Medicine in Los Alamitos, CA

Active since August 05, 2006PECOS Enrolled
90/100
CMS Quality Rating
3751 KATELLA AVE, LOS ALAMITOS, CA 90720(562) 598-1311 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Natalie Tse-lan Shum Md NPPES

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

DR. NATALIE TSE-LAN SHUM MD (NPI 1114936358) is an individual emergency medicine provider in Los Alamitos, California, licensed in California (A91774) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1114936358
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameDR. NATALIE TSE-LAN SHUMCredential: MD
Location Address3751 KATELLA AVELos Alamitos, CA 90720-3101
Mailing Address511 San Vicente Blvd, #304Santa Monica, CA 90402-1810 · (310) 430-3922
Phone(562) 598-1311
Sole ProprietorNo
Enumeration DateAugust 5, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1114936358 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in CA · A91774
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.
3751 KATELLA AVE, Los Alamitos, CA 90720
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Natalie Tse-lan Shum Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

2

Medicare enrollment records show Natalie Shum reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Tarzana Emergency Medical Associates
37 mi
Emergency Medicine
18321 CLARK ST
Tarzana, CA 91356
  • Reassigned Medicare billing, California enrollment
  • 66 clinicians in this Medicare group
NPI 1235176702 (310) 321-0143
West Hills Emergency Medical Associates, Inc
42 mi
Emergency Medicine
7300 MEDICAL CENTER DR
West Hills, CA 91307
  • Reassigned Medicare billing, California enrollment
  • 49 clinicians in this Medicare group
NPI 1275761249 (818) 676-4000

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 5

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.

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.
198 services188 patients
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.
189 services186 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.
90 services90 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.
45 services44 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
25 services25 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90720 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
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

90/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality76.81
Improvement Activities40

Other Providers at the Same Location NPPES 20

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

MEI MEDICAL CORPORATION
Anesthesiology
3751 KATELLA AVE
LOS ALAMITOS, CA 90720
Orange County (562) 598-1311
MOUSTAFA MOATAZ ABOSHADY M.D.
Hospitalist
3751 KATELLA AVE
LOS ALAMITOS, CA 90720
Orange County (928) 854-9603
DR. BRETT MICHAEL FLORIE D.O.
Anesthesiology
3751 KATELLA AVE
LOS ALAMITOS, CA 90720
Orange County (562) 598-1311
JOSEPH JEE JEAN MD
Emergency Medicine
3751 KATELLA AVE
LOS ALAMITOS, CA 90720
Orange County (562) 598-1311
ERIN WRIGHT BSN, RN, CNOR, RNFA
Registered Nurse (Registered Nurse First Assistant)
3751 KATELLA AVE
LOS ALAMITOS, CA 90720
Orange County (562) 598-1311
TED UCHIO, M.D., A PROFESSIONAL CORPORATION
Anesthesiology
3751 KATELLA AVE
LOS ALAMITOS, CA 90720
Orange County (562) 559-8131
GEORGE MORRISON DO
Radiology (Diagnostic Radiology)
3751 KATELLA AVE
LOS ALAMITOS, CA 90720
Orange County (949) 263-8620
GIHAN K WETZEL DO
Emergency Medicine
3751 KATELLA AVE
LOS ALAMITOS, CA 90720
Orange County (714) 456-8888

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 Natalie Shum's NPI number?

The NPI number for Natalie Shum is 1114936358. It was assigned to this individual provider in the NPPES registry on August 5, 2006.

Where is Natalie Shum located?

Natalie Shum practices at 3751 Katella Ave, Los Alamitos, CA 90720. The listed phone number is (562) 598-1311.

What is Natalie Shum's specialty?

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

Is Natalie Shum enrolled in Medicare?

Yes. Natalie Shum is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Natalie Shum's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Natalie Shum reassigns Medicare benefits to 2 organizations: Tarzana Emergency Medical Associates (Tarzana, CA) and West Hills Emergency Medical Associates, Inc (West Hills, CA). 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 Natalie Shum's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Natalie Shum was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.