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

DR. ARASH NAFISI M.D.
NPI 1831478122
Internal Medicine in Sylmar, CA

Active since August 04, 2011PECOS Enrolled
14445 OLIVE VIEW DR # 2B182, SYLMAR, CA 91342(747) 210-3205(747) 210-4781 Get Directions Write a Review

NPPES record last updated: October 2, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 2, 2026, Feb 23, 2022, Dec 20, 2019 (3 updates tracked since 2019).

About Dr. Arash Nafisi M.d. NPPES

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

DR. ARASH NAFISI M.D. (NPI 1831478122) is an individual internal medicine provider in Sylmar, California, licensed in California (A126134) and active in the NPI registry since August 2011. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1831478122
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. ARASH NAFISICredential: M.D.
Location Address14445 OLIVE VIEW DR # 2B182Sylmar, CA 91342-1437
Mailing Address14445 Olive View Dr # 2b182Sylmar, CA 91342-1437 · (747) 210-3205 · Fax (747) 210-4781
Phone(747) 210-3205
Fax(747) 210-4781
Sole ProprietorNo
Enumeration DateAugust 4, 2011
Last NPPES UpdateOctober 2, 20263 updates tracked since enumeration
NPPES CertifiedOctober 2, 2026
✔ NPI 1831478122 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 · A126134
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.
14445 OLIVE VIEW DR # 2B182, Sylmar, CA 91342
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Arash Nafisi 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.

Medicare Billing Reassignments

2

Medicare enrollment records show Arash Nafisi reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

County Of Los Angeles Auditor Controller
0.2 mi
General Acute Care Hospital
14445 OLIVE VIEW DR
Sylmar, CA 91342
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: County Of Los Angeles
  • 1,939 clinicians in this Medicare group
NPI 1134159320 (818) 364-3031
The Regents Of The University Of California
17 mi
Internal Medicine
200 MEDICAL PLAZA, SUITE 365,530,420,250,120,214
Los Angeles, CA 90095
  • Reassigned Medicare billing, California enrollment
  • 1,766 clinicians in this Medicare group
NPI 1235107566 (310) 794-1276

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91342 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.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
12 suppliers37 claims55 services$4.92 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
11 suppliers17 claims19 services$0.89 avg. paid by Medicare
Repair or nonroutine service for durable medical equipment other than oxygen equipment requiring the skill of a technician, labor component, per 15 minutes K0739
DME-Other DME · category DE000N
5 suppliers12 claims107 services$18.34 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 8

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

DR. ANDREW LUN WONG M.D.
Clinic/Center (Medical Specialty)
14445 OLIVE VIEW DR # 2B182
SYLMAR, CA 91342
Los Angeles County (818) 364-3205
THOMAS EDWARD NORMAN MD
Student in an Organized Health Care Education/Training Program
14445 OLIVE VIEW DR # 2B182
SYLMAR, CA 91342
Los Angeles County (747) 210-3205
SYDNIE ANN TABERNILLA ESPIRITU MD
Internal Medicine
14445 OLIVE VIEW DR # 2B182
SYLMAR, CA 91342
Los Angeles County (747) 210-3205
PHUONG CHI T PHAM MD
Internal Medicine (Nephrology)
14445 OLIVE VIEW DR # 2B182, DEPT OF MIDICINE
SYLMAR, CA 91342
Los Angeles County (818) 364-3205
MR. RANDY JOSHUA WILLIAM SIHOTANG MD
Student in an Organized Health Care Education/Training Program
14445 OLIVE VIEW DR # 2B182
SYLMAR, CA 91342
Los Angeles County (747) 210-3205
VINCENT CHAN M.D.
Internal Medicine (Critical Care Medicine)
14445 OLIVE VIEW DR # 2B182
SYLMAR, CA 91342
Los Angeles County (747) 210-4573
JANET P AU MD
Internal Medicine
14445 OLIVE VIEW DR # 2B182, OLIVE VIEW UCLA MED CTR
SYLMAR, CA 91342
Los Angeles County (818) 364-3205
TIFFANY MAGGI-MAIDINETTI MD
Internal Medicine
14445 OLIVE VIEW DR # 2B182
SYLMAR, CA 91342
Los Angeles County (747) 210-3205

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 Arash Nafisi's NPI number?

The NPI number for Arash Nafisi is 1831478122. It was assigned to this individual provider in the NPPES registry on August 4, 2011.

Where is Arash Nafisi located?

Arash Nafisi practices at 14445 Olive View Dr # 2b182, Sylmar, CA 91342. The listed phone number is (747) 210-3205.

What is Arash Nafisi's specialty?

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

Is Arash Nafisi enrolled in Medicare?

Yes. Arash Nafisi is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Arash Nafisi's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Arash Nafisi reassigns Medicare benefits to 2 organizations: County Of Los Angeles Auditor Controller (Sylmar, CA) and The Regents Of The University Of California (Los Angeles, 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 Arash Nafisi'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 Arash Nafisi was last updated on October 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 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.