DR. BORIS S ARUTYUNOV M.D.
NPI 1144562703
Hospitalist in Pasadena, CA
About Dr. Boris S Arutyunov M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. BORIS S ARUTYUNOV M.D. (NPI 1144562703) is an individual hospitalist provider in Pasadena, California, licensed in California (A137892) and active in the NPI registry since March 2013. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
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. Boris S Arutyunov M.d. 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.
Medicare Billing Reassignments
9Medicare enrollment records show Boris Arutyunov reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Pasadena, CA 91105
- Reassigned Medicare billing, California enrollment
- 204 clinicians in this Medicare group
Los Angeles, CA 90048
- Reassigned Medicare billing, California enrollment
- 2,118 clinicians in this Medicare group
Los Angeles, CA 90059
- Reassigned Medicare billing, California enrollment
- 198 clinicians in this Medicare group
Calabasas, CA 91302
- Reassigned Medicare billing, California enrollment
- 256 clinicians in this Medicare group
Apple Valley, CA 92307
- Reassigned Medicare billing, California enrollment
- 914 clinicians in this Medicare group
Escondido, CA 92025
- Reassigned Medicare billing, California enrollment
- 111 clinicians in this Medicare group
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 1,051 clinicians in this Medicare group
El Cajon, CA 92020
- Reassigned Medicare billing, California enrollment
- 87 clinicians in this Medicare group
Porterville, CA 93257
- Reassigned Medicare billing, California enrollment
- 159 clinicians in this Medicare group
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 5
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 91105 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
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.
PASADENA, CA 91105
PASADENA, CA 91105
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 Boris Arutyunov's NPI number?
The NPI number for Boris Arutyunov is 1144562703. It was assigned to this individual provider in the NPPES registry on March 21, 2013.
Where is Boris Arutyunov located?
Boris Arutyunov practices at 100 W California Blvd, Pasadena, CA 91105. The listed phone number is (626) 352-1444.
What is Boris Arutyunov's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Boris Arutyunov enrolled in Medicare?
Yes. Boris Arutyunov 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 Boris Arutyunov's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Boris Arutyunov reassigns Medicare benefits to 9 organizations: The Huntington Medical Foundation (Pasadena, CA), Cedars-Sinai Medical Care Foundation (Los Angeles, CA), Superior Hospitalist Medical Group Inc (Los Angeles, CA), Exer Medical Corporation (Calabasas, CA), Hospitalist Medicine Physicians Of California, Inc (Apple Valley, CA) and 4 more organizations, listed in the Medicare section above. 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 Boris Arutyunov'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 Boris Arutyunov was last updated on December 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Dr. Boris S Arutyunov, M.D. · NPI 1144562703
Hospitalist physician in Pasadena, California. Individual provider, active in the CMS NPPES registry since March 21, 2013.
## Identity
- **NPI:** 1144562703 (Entity type: Individual)
- **Enumerated:** March 21, 2013
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** A137892 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 100 W CALIFORNIA BLVD, Pasadena, CA 91105-3010
- **Phone:** (626) 352-1444
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 9 organizations under Medicare reassignment (form CMS-855R): The Huntington Medical Foundation (NPI 1154467181, Pasadena, CA); Cedars-Sinai Medical Care Foundation (NPI 1316984388, Los Angeles, CA); Superior Hospitalist Medical Group Inc (NPI 1780047712, Los Angeles, CA); Exer Medical Corporation (NPI 1588901532, Calabasas, CA); Hospitalist Medicine Physicians Of California, Inc (NPI 1184663965, Apple Valley, CA); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2012
## Record status
- **NPPES last updated:** December 19, 2025
---
Source: [NPI Profile](https://npiprofile.com/npi/1144562703) · Data from the CMS NPPES public registry.