Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

RODERICK NEGAL SEAMSTER M.D.
NPI 1407951551
Internal Medicine in Los Angeles, CA

Active since September 13, 2006PECOS Enrolled
10300 COMPTON AVE, LOS ANGELES, CA 90002(323) 357-6688(323) 563-6378 Get Directions Write a Review

NPPES record last updated: September 30, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

About Roderick Negal Seamster M.d. NPPES

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

RODERICK NEGAL SEAMSTER M.D. (NPI 1407951551) is an individual internal medicine provider in Los Angeles, California, licensed in California (G64516) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Sausalito, and is a graduate of Harvard Medical School (1987).

NPPES Registry Identity

NPI1407951551
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameRODERICK NEGAL SEAMSTERCredential: M.D.
Location Address10300 COMPTON AVELos Angeles, CA 90002-3628
Mailing Address5450 Blue Ridge DrYorba Linda, CA 92887-4215 · (323) 357-6688 · Fax (323) 563-6378
Fax(323) 563-6378
Sole ProprietorYes
Medical School CMSHarvard Medical SchoolGraduated 1987
Enumeration DateSeptember 13, 2006
Last NPPES UpdateSeptember 30, 2026
NPPES CertifiedSeptember 30, 2026
✔ NPI 1407951551 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · G64516
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
10300 COMPTON AVE, Los Angeles, CA 90002

Secondary Practice Location 1

Location 1100 Phillips DrSausalito, CA 94965-1172 · Phone (415) 339-8813 · Fax (415) 339-8814

Other Identifiers 1

MedicaidWG64516ACA

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

Roderick Negal Seamster M.d. 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 ID8729978044
PECOS Enrollment IDI20040322001976
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

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.

Hemoglobin a1c level 83036
Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.
13 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90002 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
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.

Licensed Vocational Nurse
10300 COMPTON AVE
LOS ANGELES, CA 90002
Pediatrics
10300 COMPTON AVE
LOS ANGELES, CA 90002
Registered Nurse
10300 COMPTON AVE
LOS ANGELES, CA 90002
Licensed Vocational Nurse
10300 COMPTON AVE
LOS ANGELES, CA 90002
Pharmacy (Clinic Pharmacy)
10300 COMPTON AVE
LOS ANGELES, CA 90002
Registered Nurse (Community Health)
10300 COMPTON AVE
LOS ANGELES, CA 90002
Obstetrics & Gynecology
10300 COMPTON AVE
LOS ANGELES, CA 90002
Case Manager/Care Coordinator
10300 COMPTON AVE
LOS ANGELES, CA 90002

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 Roderick Seamster's NPI number?

The NPI number for Roderick Seamster is 1407951551. It was assigned to this individual provider in the NPPES registry on September 13, 2006.

Where is Roderick Seamster located?

Roderick Seamster practices at 10300 Compton Ave, Los Angeles, CA 90002. The listed phone number is (323) 357-6688.

What is Roderick Seamster's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Roderick Seamster enrolled in Medicare?

Yes. Roderick Seamster 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.

When was this NPI record last updated?

The NPPES record for Roderick Seamster was last updated on September 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 days 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.