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DR. DAVID MARK EDWARD LLEWELLYN MD
NPI 1043281850
Psychiatry & Neurology - Neurology in Oceanside, CA

Active since January 30, 2006PECOS Enrolled
200 MERCY CIRCLE, NHCP INTERNAL MEDICINE, OCEANSIDE, CA 92055(928) 649-7991 Get Directions Write a Review

NPPES record last updated: February 4, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Feb 4, 2025, Apr 20, 2018, Dec 14, 2015 and 1 more (4 updates tracked since 2015).

About Dr. David Mark Edward Llewellyn Md NPPES

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

DR. DAVID MARK EDWARD LLEWELLYN MD (NPI 1043281850) is an individual neurology provider in Oceanside, California, licensed in California (G143603) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1043281850
Entity TypeIndividualMale
Primary Taxonomy2084N0400X
Provider Legal NameDR. DAVID MARK EDWARD LLEWELLYNCredential: MD
Location Address200 MERCY CIRCLE, NHCP INTERNAL MEDICINEOceanside, CA 92055
Mailing Address200 Mercy Circle, Nhcp Internal MedicineOceanside, CA 92055 · (760) 719-3682 · Fax (760) 725-1690
Phone(928) 649-7991
Sole ProprietorNo
Enumeration DateJanuary 30, 2006
Last NPPES UpdateFebruary 4, 20254 updates tracked since enumeration
NPPES CertifiedFebruary 4, 2025
✔ NPI 1043281850 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians
Taxonomy Code2084N0400X
Licenses✔ Licensed in CA · G143603✔ Licensed in CA · G144603
Definition
A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.
200 MERCY CIRCLE, Oceanside, CA 92055
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Other Identifiers 1

Medicaid790956AZ

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. David Mark Edward Llewellyn 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.

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
MISS KELLY CAROL PENG D.O
Military Health Care Provider
200 MERCY CIRCLE, EMERGENCY MEDICINE DEPARTMENT
OCEANSIDE, CA 92055
San Diego County (760) 719-3994
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

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 David Llewellyn's NPI number?

The NPI number for David Llewellyn is 1043281850. It was assigned to this individual provider in the NPPES registry on January 30, 2006.

Where is David Llewellyn located?

David Llewellyn practices at 200 Mercy Circle Nhcp Internal Medicine, Oceanside, CA 92055. The listed phone number is (928) 649-7991.

What is David Llewellyn's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Is David Llewellyn enrolled in Medicare?

Yes. David Llewellyn is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for David Llewellyn was last updated on February 4, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.