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DR. RYAN ALISTAIR JOHN MARAIS MD
NPI 1922688282
Internal Medicine in Loma Linda, CA

Active since April 12, 2021PECOS EnrolledAccepts Medicare Assignment
11370 ANDERSON ST STE 3150, LOMA LINDA, CA 92354(909) 558-2191 Get Directions Write a Review

NPPES record last updated: July 23, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Ryan Alistair John Marais Md NPPES

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

DR. RYAN ALISTAIR JOHN MARAIS MD (NPI 1922688282) is an individual internal medicine provider in Loma Linda, California, licensed in California (A192109) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS and is a graduate of Other (2021).

NPPES Registry Identity

NPI1922688282
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. RYAN ALISTAIR JOHN MARAISCredential: MD
Location Address11370 ANDERSON ST STE 3150Loma Linda, CA 92354-3450
Mailing Address11234 Anderson StLoma Linda, CA 92354-2804
Phone(909) 558-2191
Sole ProprietorNo
Medical School CMSOtherGraduated 2021
Enumeration DateApril 12, 2021
Last NPPES UpdateJuly 23, 2025
NPPES CertifiedJuly 23, 2025
✔ NPI 1922688282 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A192109
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.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
11370 ANDERSON ST STE 3150, Loma Linda, CA 92354
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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 and accepts Medicare assignment

Dr. Ryan Alistair John Marais 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 ID8224542121
PECOS Enrollment IDI20250710002353
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 92354 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
$136.04 typical visit price
range $59.60 – $179.42
Typical copayment $34.01 (range $14.90 – $44.85)
Most-billed visit code 99204
Established Patient
$104.64 typical visit price
range $19.37 – $146.42
Typical copayment $26.16 (range $4.84 – $36.60)
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 2

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

RUTH HORTENCIA RAMON
Internal Medicine
11370 ANDERSON ST STE 3150
LOMA LINDA, CA 92354
San Bernardino County (909) 558-4047
GREGORY CHEEK M.D.
Internal Medicine (Critical Care Medicine)
11370 ANDERSON ST STE 3150
LOMA LINDA, CA 92354
San Bernardino County (909) 558-2191

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 Ryan Marais's NPI number?

The NPI number for Ryan Marais is 1922688282. It was assigned to this individual provider in the NPPES registry on April 12, 2021.

Where is Ryan Marais located?

Ryan Marais practices at 11370 Anderson St Ste 3150, Loma Linda, CA 92354. The listed phone number is (909) 558-2191.

What is Ryan Marais's specialty?

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

Is Ryan Marais enrolled in Medicare?

Yes. Ryan Marais 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 Ryan Marais was last updated on July 23, 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.