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DR. RYAN SHILIAN DO
NPI 1598144032
Internal Medicine - Allergy & Immunology in Encino, CA

Active since May 28, 2015PECOS EnrolledAccepts Medicare Assignment
16661 VENTURA BLVD STE 409, ENCINO, CA 91436(818) 514-3544(818) 578-0298 Get Directions Write a Review

NPPES record last updated: September 14, 2022. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Sep 14, 2022, Apr 18, 2022, Dec 3, 2018 (3 updates tracked since 2018).

About Dr. Ryan Shilian Do NPPES

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

DR. RYAN SHILIAN DO (NPI 1598144032) is an individual allergy & immunology provider in Encino, California, licensed in California (34.013552) and active in the NPI registry since May 2015. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2014).

NPPES Registry Identity

NPI1598144032
Entity TypeIndividualMale
Primary Taxonomy207RA0201X
Provider Legal NameDR. RYAN SHILIANCredential: DO
Location Address16661 VENTURA BLVD STE 409Encino, CA 91436-1962
Mailing Address16661 Ventura Blvd Ste 409Encino, CA 91436-1962 · (818) 514-3544 · Fax (818) 578-0298
Phone(818) 514-3544
Fax(818) 578-0298
Sole ProprietorNo
Medical School CMSOtherGraduated 2014
Enumeration DateMay 28, 2015
Last NPPES UpdateSeptember 14, 20223 updates tracked since enumeration
NPPES CertifiedSeptember 14, 2022
✔ NPI 1598144032 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Allergy & ImmunologyAllopathic & Osteopathic Physicians
Taxonomy Code207RA0201X
License✔ Licensed in CA · 34.013552
Definition
An internist doctor of osteopathy that specializes in the treatment of allergy and immunologic disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine can obtain a Certificate of Special Qualifications in the field of Allergy & Immunology.
Also ListedInternal MedicineTaxonomy 207R00000X · License 34.013552 (OH)
16661 VENTURA BLVD STE 409, Encino, CA 91436
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Secondary Practice Locations 2

Location 12412 N Ponderosa Dr Ste B111Camarillo, CA 93010-2379 · Phone (805) 482-9889
Location 227100 Chardon RdRichmond Heights, OH 44143-1116 · Phone (440) 585-6323

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

Dr. Ryan Shilian Do 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 ID5193073807
PECOS Enrollment IDI20220612000005
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

4

Medicare enrollment records show Ryan Shilian reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Allergy & Immunology Center Inc
Same address
Medical Specialty
16661 VENTURA BLVD STE 311
Encino, CA 91436
  • Reassigned Medicare billing, California enrollment
NPI 1255071635 (310) 867-3480
Superior Hospitalist Medical Group Inc
22 mi
Hospitalist
1680 E 120TH ST
Los Angeles, CA 90059
  • Reassigned Medicare billing, California enrollment
  • 198 clinicians in this Medicare group
NPI 1780047712 (330) 493-4443
Inpatient Specialists Of California, PC
70 mi
Internal Medicine
2101 N WATERMAN AVE
San Bernardino, CA 92404
  • Reassigned Medicare billing, California enrollment
  • 1,216 clinicians in this Medicare group
NPI 1952792475 (615) 377-5658
Hospitalist Medicine Physicians Of California, Inc
75 mi
Internal Medicine
18300 US HIGHWAY 18
Apple Valley, CA 92307
  • Reassigned Medicare billing, California enrollment
  • 914 clinicians in this Medicare group
NPI 1184663965 (760) 946-4233

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 6

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.

Test for allergy using allergenic extract 95004
An allergy test with allergenic extract is a diagnostic method to identify substances causing allergic reactions. Small amounts of common allergens are introduced to your body, usually through skin pricks or blood tests. Your body's response helps determine your allergies.
1,776 services24 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
94 services91 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.
80 services32 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
59 services29 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
38 services38 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
20 services20 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91436 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
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Shilian's NPI number?

The NPI number for Ryan Shilian is 1598144032. It was assigned to this individual provider in the NPPES registry on May 28, 2015.

Where is Ryan Shilian located?

Ryan Shilian practices at 16661 Ventura Blvd Ste 409, Encino, CA 91436. The listed phone number is (818) 514-3544.

What is Ryan Shilian's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Allergy & Immunology, with taxonomy code 207RA0201X.

Is Ryan Shilian enrolled in Medicare?

Yes. Ryan Shilian 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 Ryan Shilian's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ryan Shilian reassigns Medicare benefits to 4 organizations: Allergy & Immunology Center Inc (Encino, CA), Superior Hospitalist Medical Group Inc (Los Angeles, CA), Inpatient Specialists Of California, PC (San Bernardino, CA) and Hospitalist Medicine Physicians Of California, Inc (Apple Valley, CA). 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 Ryan Shilian'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 Ryan Shilian was last updated on September 14, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.