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NICHOLAS DEMETRIOS STEKAS
NPI 1699338715
Orthopaedic Surgery - Sports Medicine in Mission Viejo, CA

Active since April 15, 2019PECOS EnrolledAccepts Medicare Assignment
26730 CROWN VALLEY PKWY STE 200, MISSION VIEJO, CA 92691(949) 364-2154 Get Directions Write a Review

NPPES record last updated: August 19, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Aug 19, 2026, Apr 15, 2019 (2 updates tracked since 2019).

About Nicholas Demetrios Stekas NPPES

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

NICHOLAS DEMETRIOS STEKAS (NPI 1699338715) is an individual sports medicine provider in Mission Viejo, California, licensed in California (A195581) and active in the NPI registry since April 2019. He is enrolled in Medicare PECOS, maintains a secondary practice location in San Clemente, and is a graduate of Rutgers New Jersey Medical School (2019).

NPPES Registry Identity

NPI1699338715
Entity TypeIndividualMale
Primary Taxonomy207XX0005X
Provider Legal NameNICHOLAS DEMETRIOS STEKAS
Location Address26730 CROWN VALLEY PKWY STE 200Mission Viejo, CA 92691-8001
Mailing Address26730 Crown Valley Pkwy Ste 200Mission Viejo, CA 92691-8001 · (949) 364-2154
Phone(949) 364-2154
Sole ProprietorNo
Medical School CMSRutgers New Jersey Medical SchoolGraduated 2019
Enumeration DateApril 15, 2019
Last NPPES UpdateAugust 19, 20262 updates tracked since enumeration
NPPES CertifiedAugust 19, 2026
✔ NPI 1699338715 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic Surgery · Sports MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207XX0005X
License✔ Licensed in CA · A195581
Definition
An orthopaedic surgeon trained in sports medicine provides appropriate care for all structures of the musculoskeletal system directly affected by participation in sporting activity. This specialist is proficient in areas including conditioning, training and fitness, athletic performance and the impact of dietary supplements, pharmaceuticals, and nutrition on performance and health, coordination of care within the team setting utilizing other health care professionals, field evaluation and management, soft tissue biomechanics and injury healing and repair. Knowledge and understanding of the principles and techniques of rehabilitation, athletic equipment and orthotic devices enables the specialist to prevent and manage athletic injuries.
26730 CROWN VALLEY PKWY STE 200, Mission Viejo, CA 92691
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Secondary Practice Location 1

Location 1653 Camino De Los Mares Ste 109San Clemente, CA 92673-2808 · Phone (949) 661-2423

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

Nicholas Demetrios Stekas 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 ID4789115536
PECOS Enrollment IDI20250220003501
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 Reassignment

Medicare enrollment records show Nicholas Stekas reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Orthopaedic Specialty Institute Medical Group Of Orange County
19 mi
Orthopaedic Surgery
363 S MAIN ST STE 220
Orange, CA 92868
  • Reassigned Medicare billing, California enrollment
  • 44 clinicians in this Medicare group
NPI 1336228832 (714) 634-4567

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

Other Providers at the Same Location NPPES 4

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

DR. MICHAEL D CUMMINGS MD
Psychiatry & Neurology (Neurology)
26730 CROWN VALLEY PKWY STE 200
MISSION VIEJO, CA 92691
Orange County (949) 235-1508
DR. WILLIAM WANG M.D.
Orthopaedic Surgery (Foot and Ankle Surgery)
26730 CROWN VALLEY PKWY STE 200
MISSION VIEJO, CA 92691
Orange County (949) 364-2154
MR. ROGER D WILLIAMS PT
Physical Therapist
26730 CROWN VALLEY PKWY STE 200
MISSION VIEJO, CA 92691
Orange County (949) 364-5210
MICHAEL J FITZPATRICK MD
Orthopaedic Surgery (Sports Medicine)
26730 CROWN VALLEY PKWY STE 200
MISSION VIEJO, CA 92691
Orange County (949) 364-2154

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 Nicholas Stekas's NPI number?

The NPI number for Nicholas Stekas is 1699338715. It was assigned to this individual provider in the NPPES registry on April 15, 2019.

Where is Nicholas Stekas located?

Nicholas Stekas practices at 26730 Crown Valley Pkwy Ste 200, Mission Viejo, CA 92691. The listed phone number is (949) 364-2154.

What is Nicholas Stekas's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Sports Medicine, with taxonomy code 207XX0005X.

Is Nicholas Stekas enrolled in Medicare?

Yes. Nicholas Stekas 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 organization bills Medicare for Nicholas Stekas's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nicholas Stekas reassigns Medicare benefits to Orthopaedic Specialty Institute Medical Group Of Orange County (Orange, CA). The 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 Nicholas Stekas'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 Nicholas Stekas was last updated on August 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.