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EMMA ERNST MD, MPH
NPI 1821728718
Family Medicine in Santa Monica, CA

Active since June 14, 2022PECOS EnrolledAccepts Medicare Assignment
1920 COLORADO AVE, SANTA MONICA, CA 90404(310) 319-4700 Get Directions Write a Review

NPPES record last updated: October 24, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Emma Ernst Md, Mph NPPES

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

EMMA ERNST MD, MPH (NPI 1821728718) is an individual family medicine provider in Santa Monica, California, licensed in California (A205280) and active in the NPI registry since June 2022. She is enrolled in Medicare PECOS and is a graduate of Tufts University School Of Medicine (2022).

NPPES Registry Identity

NPI1821728718
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameEMMA ERNSTCredential: MD, MPH
Location Address1920 COLORADO AVESanta Monica, CA 90404-3414
Mailing Address5767 W Century Blvd Ste 400Los Angeles, CA 90045-5631
Phone(310) 319-4700
Sole ProprietorNo
Medical School CMSTufts University School Of MedicineGraduated 2022
Enumeration DateJune 14, 2022
Last NPPES UpdateOctober 24, 2025
NPPES CertifiedOctober 24, 2025
✔ NPI 1821728718 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · A205280
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.
1920 COLORADO AVE, Santa Monica, CA 90404
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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 and accepts Medicare assignment

Emma Ernst Md, Mph 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 ID5799165940
PECOS Enrollment IDI20251022002279
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 Emma Ernst reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Uc Regents
Same address
Family Medicine
1920 COLORADO AVE
Santa Monica, CA 90404
  • Reassigned Medicare billing, California enrollment
  • 49 clinicians in this Medicare group
NPI 1275591802 (310) 319-4700
County Of Los Angeles
0.8 mi
Public Health, State or Local
2509 PICO BLVD
Santa Monica, CA 90405
  • Reassigned Medicare billing, California enrollment
  • 1,939 clinicians in this Medicare group
NPI 1235323080 (310) 998-3203

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90404 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.

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.

MERON ABREHAM MD
Family Medicine
1920 COLORADO AVE
SANTA MONICA, CA 90404
Los Angeles County (310) 319-4700
STEVEN JOSEPH SHOPTAW M.D.
Psychologist (Clinical)
1920 COLORADO AVE
SANTA MONICA, CA 90404
Los Angeles County (310) 319-4700
OLIVIA TAEKO ISHIBASHI MD, MPH
Family Medicine
1920 COLORADO AVE
SANTA MONICA, CA 90404
Los Angeles County (310) 319-4700
DR. BRIAN YOSHIO LAING M.D.
Family Medicine
1920 COLORADO AVE
SANTA MONICA, CA 90404
Los Angeles County (310) 319-4700
JENNIFER ELIZABETH MACDONALD M.D.
Student in an Organized Health Care Education/Training Program
1920 COLORADO AVE
SANTA MONICA, CA 90404
Los Angeles County (320) 267-7136
THALIA NGUYEN MD
Family Medicine
1920 COLORADO AVE
SANTA MONICA, CA 90404
Los Angeles County (310) 319-4700
AMILY DARA TUOT MD
Student in an Organized Health Care Education/Training Program
1920 COLORADO AVE
SANTA MONICA, CA 90404
Los Angeles County (310) 319-4700
DR. MEVAN DHAANU HAPPAWANA MD
Family Medicine
1920 COLORADO AVE
SANTA MONICA, CA 90404
Los Angeles County (310) 319-4700

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 Emma Ernst's NPI number?

The NPI number for Emma Ernst is 1821728718. It was assigned to this individual provider in the NPPES registry on June 14, 2022.

Where is Emma Ernst located?

Emma Ernst practices at 1920 Colorado Ave, Santa Monica, CA 90404. The listed phone number is (310) 319-4700.

What is Emma Ernst's specialty?

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

Is Emma Ernst enrolled in Medicare?

Yes. Emma Ernst 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 Emma Ernst's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Emma Ernst reassigns Medicare benefits to 2 organizations: Uc Regents (Santa Monica, CA) and County Of Los Angeles (Santa Monica, 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 Emma Ernst'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 Emma Ernst was last updated on October 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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.