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SEAN XIANG CHEN MD
NPI 1336777838
Family Medicine - Adult Medicine in Northridge, CA

Active since March 30, 2020PECOS EnrolledAccepts Medicare Assignment
18546 ROSCOE BLVD STE 300, NORTHRIDGE, CA 91324(818) 886-4028(818) 886-6072 Get Directions Write a Review

NPPES record last updated: December 7, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 7, 2025, Mar 26, 2025, Nov 29, 2021 and 1 more (4 updates tracked since 2020).

About Sean Xiang Chen Md NPPES

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

SEAN XIANG CHEN MD (NPI 1336777838) is an individual adult medicine provider in Northridge, California, licensed in California (A184478) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS and is a graduate of Other (2020).

NPPES Registry Identity

NPI1336777838
Entity TypeIndividualMale
Primary Taxonomy207QA0505X
Provider Legal NameSEAN XIANG CHENCredential: MD
Location Address18546 ROSCOE BLVD STE 300Northridge, CA 91324-5458
Mailing AddressPo Box 35380Las Vegas, NV 89133-5380 · (702) 579-3203
Phone(818) 886-4028
Fax(818) 886-6072
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateMarch 30, 2020
Last NPPES UpdateDecember 7, 20254 updates tracked since enumeration
NPPES CertifiedDecember 7, 2025
✔ NPI 1336777838 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily Medicine · Adult MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207QA0505X
License✔ Licensed in CA · A184478
Definition
The National Uniform Claim Committee (NUCC) recommends code 207QA0505X not be used. Choose a more appropriate code.
18546 ROSCOE BLVD STE 300, Northridge, CA 91324
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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

Sean Xiang Chen Md 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 ID1951795996
PECOS Enrollment IDI20231110002489
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

6

Medicare enrollment records show Sean Chen reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Southern California Permanente Medical Group
2.2 mi
Health Maintenance Organization
8999 BALBOA BLVD
Northridge, CA 91325
  • Reassigned Medicare billing, California enrollment
  • 13,921 clinicians in this Medicare group
NPI 1013409036 (877) 608-0044
Healthcare Partners Affiliates Medical Group
19 mi
Internal Medicine
1120 W WASHINGTON BLVD
Los Angeles, CA 90015
  • Reassigned Medicare billing, California enrollment
  • 2,052 clinicians in this Medicare group
NPI 1659312593 (213) 623-2225
Centers For Family Medicine Gp
39 mi
Family Medicine
3460 KATELLA AVE
Los Alamitos, CA 90720
  • Reassigned Medicare billing, California enrollment
  • 228 clinicians in this Medicare group
NPI 1467598243 (562) 594-6599
Saddleback Medical Group Inc
63 mi
Gastroenterology
24221 CALLE DE LA LOUISA, SUITE 400
Laguna Hills, CA 92653
  • Reassigned Medicare billing, California enrollment
  • 86 clinicians in this Medicare group
NPI 1386605822 (949) 465-8155
Pinnacle Medical Group, Inc
64 mi
Family Medicine
8110 MANGO AVE
Fontana, CA 92335
  • Reassigned Medicare billing, California enrollment
  • 149 clinicians in this Medicare group
NPI 1376876912 (909) 427-1303
Beaver Medical Group P C
78 mi
Family Medicine
2 WEST FERN AVENUE
Redlands, CA 92373
  • Reassigned Medicare billing, California enrollment
  • 635 clinicians in this Medicare group
NPI 1649503319 (909) 793-3311

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.

Telephone medical discussion with physician, 5-10 minutes 99441
A telephone medical discussion with a physician is a brief, 5-10 minute call where you can discuss your health concerns. It's a convenient way to receive medical advice without needing to visit a clinic. It's important to prepare questions in advance to make the most of this time.
35 services22 patients
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.
27 services22 patients
Telephone medical discussion with physician, 11-20 minutes 99442
This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.
19 services13 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
17 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91324 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.

Patient Reviews User submitted

Reviews are submitted by site visitors and approved by a human moderator before publication.

Review by Perry ***** February 2, 2024

5/5
Dr, Chen and his staff are fantastic. They all made me feel welcome and comfortable. Dr, Chen seemed to read my mind and knew what to say to my queries, and what I needed. As my new GP, I am thrilled I was assigned to be his patient.
Office Staff 5/5
Visited this provider? Share your experience.

Other Providers at the Same Location NPPES 6

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

DR. DARIN KARL BUSCHMANN M.D.
Internal Medicine
18546 ROSCOE BLVD STE 300
NORTHRIDGE, CA 91324
Los Angeles County (818) 886-4028
DR. ARTHUR L GORDON MD
Internal Medicine
18546 ROSCOE BLVD STE 300
NORTHRIDGE, CA 91324
Los Angeles County (818) 886-4028
MRS. KATHRYN ERHAHON-ILEN-OTUMA FNP
Nurse Practitioner (Family)
18546 ROSCOE BLVD STE 300
NORTHRIDGE, CA 91324
Los Angeles County (818) 886-4028
NORINDA KREMICKI NP
Nurse Practitioner (Family)
18546 ROSCOE BLVD STE 300
NORTHRIDGE, CA 91324
Los Angeles County (818) 886-4028
SHARON GREWAL MD
Internal Medicine
18546 ROSCOE BLVD STE 300
NORTHRIDGE, CA 91324
Los Angeles County (818) 886-4028
ISAK ELKAYAM MD
Family Medicine
18546 ROSCOE BLVD STE 300
NORTHRIDGE, CA 91324
Los Angeles County (818) 886-4028

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 Sean Chen's NPI number?

The NPI number for Sean Chen is 1336777838. It was assigned to this individual provider in the NPPES registry on March 30, 2020.

Where is Sean Chen located?

Sean Chen practices at 18546 Roscoe Blvd Ste 300, Northridge, CA 91324. The listed phone number is (818) 886-4028.

What is Sean Chen's specialty?

The primary specialty registered for this NPI is Family Medicine, specializing in Adult Medicine, with taxonomy code 207QA0505X.

Is Sean Chen enrolled in Medicare?

Yes. Sean Chen 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 Sean Chen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sean Chen reassigns Medicare benefits to 6 organizations: Southern California Permanente Medical Group (Northridge, CA), Healthcare Partners Affiliates Medical Group (Los Angeles, CA), Centers For Family Medicine Gp (Los Alamitos, CA), Saddleback Medical Group Inc (Laguna Hills, CA), Pinnacle Medical Group, Inc (Fontana, CA) and 1 more organization, listed in the Medicare section above. 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 Sean Chen'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 Sean Chen was last updated on December 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.