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OSEP ARMAGAN M.D.
NPI 1265462337
Orthopaedic Surgery in Westlake Village, CA

Active since July 04, 2006PECOS Enrolled
141 TRIUNFO CANYON RD, SUITE 101, WESTLAKE VILLAGE, CA 91361(805) 496-2229(805) 496-7479 Get Directions Write a Review

NPPES record last updated: June 16, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jun 16, 2023, Mar 10, 2023, Feb 28, 2023 and 1 more (4 updates tracked since 2022).

About Osep Armagan M.d. NPPES

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

OSEP ARMAGAN M.D. (NPI 1265462337) is an individual orthopaedic surgery provider in Westlake Village, California, licensed in Wisconsin (38392) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Neenah.

NPPES Registry Identity

NPI1265462337
Entity TypeIndividualMale
Primary Taxonomy207X00000X
Provider Legal NameOSEP ARMAGANCredential: M.D.
Location Address141 TRIUNFO CANYON RD, SUITE 101Westlake Village, CA 91361-2525
Mailing Address875 Comstock Ave, Apt 7dLos Angeles, CA 90024-2571 · (805) 496-2229 · Fax (805) 496-7479
Phone(805) 496-2229
Fax(805) 496-7479
Sole ProprietorYes
Enumeration DateJuly 4, 2006
Last NPPES UpdateJune 16, 20234 updates tracked since enumeration
NPPES CertifiedJune 16, 2023
✔ NPI 1265462337 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207X00000X
License✔ Licensed in WI · 38392
Definition
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
Also ListedOrthopaedic Surgery · Foot and Ankle SurgeryTaxonomy 207XX0004X · License G88110 (CA), 38392 (WI)
141 TRIUNFO CANYON RD, Westlake Village, CA 91361
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Secondary Practice Location 1

Location 1130 2nd StNeenah, WI 54956-2883 · Phone (920) 831-5050

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Osep Armagan 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

3

Medicare enrollment records show Osep Armagan reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Southern Monterey County Memorial Hospital
192 mi
Clinic/Center
400 CANAL ST, STE A
King City, CA 93930
  • Reassigned Medicare billing, California enrollment
  • 156 clinicians in this Medicare group
NPI 1821300427 (831) 385-1280
Surgical Affiliates Of California
230 mi
Surgery
807 ILLINOIS AVE
Los Banos, CA 93635
  • Reassigned Medicare billing, California enrollment
  • 91 clinicians in this Medicare group
NPI 1932440781 (209) 710-8695
Acute Care Surgery Medical Group, Inc.
338 mi
Surgery
2801 K STREET SUITE 440
Sacramento, CA 95816
  • Reassigned Medicare billing, California enrollment
  • 266 clinicians in this Medicare group
NPI 1700069549 (916) 441-0400

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 91361 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
$95.28 typical visit price
range $62.32 – $185.36
Typical copayment $23.82 (range $15.58 – $46.34)
Most-billed visit code 99203
Established Patient
$77.11 typical visit price
range $20.68 – $151.85
Typical copayment $19.27 (range $5.17 – $37.96)
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.

Other Providers at the Same Location NPPES 10

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

DANIELLE RYBA MD
Family Medicine
141 TRIUNFO CANYON RD
WESTLAKE VILLAGE, CA 91361
Los Angeles County (053) 711-3938
DR. OSEP E ARMAGAN M.D INC
Orthopaedic Surgery (Foot and Ankle Surgery)
141 TRIUNFO CANYON RD, SUITE 101
WESTLAKE VILLAGE, CA 91361
Los Angeles County (805) 496-2229
CELIA HANSEN
Physical Therapist
141 TRIUNFO CANYON RD
WESTLAKE VILLAGE, CA 91361
Los Angeles County (805) 373-6560
MRS. DENA HORASANIAN MS CCC
Speech-Language Pathologist
141 TRIUNFO CANYON RD
WESTLAKE VILLAGE, CA 91361
Los Angeles County (805) 373-6560
ERIC BORANIAN
Physical Therapist
141 TRIUNFO CANYON RD
WESTLAKE VILLAGE, CA 91361
Los Angeles County (805) 373-6560
MONA SHAKIBAI
Physical Therapist
141 TRIUNFO CANYON RD
WESTLAKE VILLAGE, CA 91361
Los Angeles County (805) 373-6560
MRS. JILL ANN MARDER-MEYER O.T.R./L.
Occupational Therapist (Physical Rehabilitation)
141 TRIUNFO CANYON RD
WESTLAKE VILLAGE, CA 91361
Los Angeles County (805) 373-6560
TERESA ANNE COSENZA DPT
Physical Therapist
141 TRIUNFO CANYON RD
WESTLAKE VILLAGE, CA 91361
Los Angeles County (805) 373-6560

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 Osep Armagan's NPI number?

The NPI number for Osep Armagan is 1265462337. It was assigned to this individual provider in the NPPES registry on July 4, 2006.

Where is Osep Armagan located?

Osep Armagan practices at 141 Triunfo Canyon Rd Suite 101, Westlake Village, CA 91361. The listed phone number is (805) 496-2229.

What is Osep Armagan's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Is Osep Armagan enrolled in Medicare?

Yes. Osep Armagan is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Osep Armagan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Osep Armagan reassigns Medicare benefits to 3 organizations: Southern Monterey County Memorial Hospital (King City, CA), Surgical Affiliates Of California (Los Banos, CA) and Acute Care Surgery Medical Group, Inc. (Sacramento, 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 Osep Armagan'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 Osep Armagan was last updated on June 16, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.