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BRETT MARAR CHAMBERLIN M.D.
NPI 1134323934
Internal Medicine in Oceanside, CA

Active since June 14, 2007PECOS Enrolled
200 MERCY CIRCLE, OCEANSIDE, CA 92055(760) 725-1288 Get Directions Write a Review

NPPES record last updated: October 20, 2023. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Oct 20, 2023, Dec 20, 2016 (2 updates tracked since 2016).

About Brett Marar Chamberlin M.d. NPPES

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

BRETT MARAR CHAMBERLIN M.D. (NPI 1134323934) is an individual internal medicine provider in Oceanside, California, licensed in California (105614) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1134323934
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameBRETT MARAR CHAMBERLINCredential: M.D.
Location Address200 MERCY CIRCLEOceanside, CA 92055
Mailing AddressPsc 455 Box 208Fpo, AP 96540-0003
Phone(760) 725-1288
Sole ProprietorYes
Enumeration DateJune 14, 2007
Last NPPES UpdateOctober 20, 20232 updates tracked since enumeration
NPPES CertifiedMay 23, 2022
✔ NPI 1134323934 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 · 105614
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.
200 MERCY CIRCLE, Oceanside, CA 92055
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Brett Marar Chamberlin M.d. 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92055 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
$140.22 typical visit price
range $62.10 – $184.71
Typical copayment $35.05 (range $15.52 – $46.17)
Most-billed visit code 99204
Established Patient
$108.42 typical visit price
range $20.62 – $151.42
Typical copayment $27.10 (range $5.15 – $37.85)
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.

MARIA J HERRERA PH.D.
Psychologist (Clinical)
200 MERCY CIRCLE
OCEANSIDE, CA 92055
San Diego County (510) 542-0859
SHERRI MARTINEZ LMFT, ADCII
Counselor (Addiction (Substance Use Disorder))
200 MERCY CIRCLE
CAMP PENDLETON, CA 92055
San Diego County (760) 725-0063
DR. ASHLEY BITTLE LCSW, PSY.D.
Psychologist (Clinical)
200 MERCY CIRCLE
CAMP PENDLETON, CA 92055
San Diego County (760) 719-3322
CAROLYN STEINLAGE DPT
Physical Therapist
200 MERCY CIRCLE
CAMP PENDLETON, CA 92055
San Diego County (760) 719-3791
SHANE MCGUIRE FMF RECON IDC
Military Health Care Provider (Independent Duty Corpsman)
200 MERCY CIRCLE
OCEANSIDE, CA 92055
San Diego County (760) 725-8912
MELINDA WEE FAH MARTINEZ PA
Physician Assistant
200 MERCY CIRCLE
CAMP PENDLETON, CA 92055
San Diego County (760) 719-4550
ALEXANDER JEFFREY NELSON PA-C
Physician Assistant
200 MERCY CIRCLE
OCEANSIDE, CA 92055
San Diego County (760) 725-1288
ELLA HAHN SCHULTZ DO
Student in an Organized Health Care Education/Training Program
200 MERCY CIRCLE
CAMP PENDLETON, CA 92055
San Diego County (760) 725-1288

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 Brett Chamberlin's NPI number?

The NPI number for Brett Chamberlin is 1134323934. It was assigned to this individual provider in the NPPES registry on June 14, 2007.

Where is Brett Chamberlin located?

Brett Chamberlin practices at 200 Mercy Circle, Oceanside, CA 92055. The listed phone number is (760) 725-1288.

What is Brett Chamberlin's specialty?

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

Is Brett Chamberlin enrolled in Medicare?

Yes. Brett Chamberlin is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Brett Chamberlin was last updated on October 20, 2023. 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.