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DR. LARRY MARC GERSTEN M.D.
NPI 1417950064
Orthopaedic Surgery - Adult Reconstructive Orthopaedic Surgery in Laguna Woods, CA

Active since May 27, 2005PECOS Enrolled
24331 EL TORO RD STE 200, LAGUNA WOODS, CA 92637(949) 586-3200(949) 900-2116 Get Directions Write a Review

NPPES record last updated: June 19, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 19, 2020, Oct 20, 2016 (2 updates tracked since 2016).

About Dr. Larry Marc Gersten M.d. NPPES

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

DR. LARRY MARC GERSTEN M.D. (NPI 1417950064) is an individual adult reconstructive orthopaedic surgery provider in Laguna Woods, California, licensed in California (G50397) and active in the NPI registry since May 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1417950064
Entity TypeIndividualMale
Primary Taxonomy207XS0114X
Provider Legal NameDR. LARRY MARC GERSTENCredential: M.D.
Location Address24331 EL TORO RD STE 200Laguna Woods, CA 92637-3116
Mailing Address24331 El Toro Rd Ste 200Laguna Woods, CA 92637-3116 · (949) 586-3200 · Fax (949) 900-2116
Phone(949) 586-3200
Fax(949) 900-2116
Sole ProprietorNo
Enumeration DateMay 27, 2005
Last NPPES UpdateJune 19, 20202 updates tracked since enumeration
NPPES CertifiedJune 19, 2020
✔ NPI 1417950064 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic Surgery · Adult Reconstructive Orthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207XS0114X
License✔ Licensed in CA · G50397
Definition
Recognized by several state medical boards as a fellowship subspecialty program of orthopaedic surgery, adult reconstructive orthopaedic surgeons deal with reconstructive procedures such as joint arthroplasty (i.e., hip and knee), osteotomy, arthroscopy, soft-tissue reconstruction, and a variety of other adult reconstructive surgical procedures.
24331 EL TORO RD STE 200, Laguna Woods, CA 92637
Open in Google Maps ↗

Other Identifiers 3

OtherRR2000 19525CA · Medicare Railroad
Medicaid00G503970CA
Other00G503970G89CA · Cal-optima

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Larry Marc Gersten 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 Larry Gersten reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Orthowest
Same address
Orthopaedic Surgery
24331 EL TORO RD STE 200
Laguna Woods, CA 92637
  • Reassigned Medicare billing, California enrollment
  • 57 clinicians in this Medicare group
NPI 1760007330 (949) 586-3200
South County Orthopedic Specialists
0.2 mi
Specialist
24331 EL TORO RD, STE 200
Laguna Woods, CA 92637
  • Reassigned Medicare billing, California enrollment
  • 12 clinicians in this Medicare group
NPI 1053314625 (949) 586-3200

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 20

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

DAVID MOLHO MD
Orthopaedic Surgery
24331 EL TORO RD STE 200
LAGUNA WOODS, CA 92637
Orange County (949) 586-3200
DR. AMAR ARUN PATEL MD
Orthopaedic Surgery (Hand Surgery)
24331 EL TORO RD STE 200
LAGUNA WOODS, CA 92637
Orange County (949) 586-3200
DR. BRYCE ALAN JOHNSON M.D.
Orthopaedic Surgery (Orthopaedic Surgery of the Spine)
24331 EL TORO RD STE 200
LAGUNA WOODS, CA 92637
Orange County (949) 586-3200
ARI YOUDERIAN M.D.
Orthopaedic Surgery
24331 EL TORO RD STE 200
LAGUNA WOODS, CA 92637
Orange County (949) 586-3200
DR. ARASH AMINIAN M.D.
Orthopaedic Surgery (Foot and Ankle Surgery)
24331 EL TORO RD STE 200
LAGUNA WOODS, CA 92637
Orange County (949) 586-3200
DR. EMILY MARIE CLARKE MD
Orthopaedic Surgery (Hand Surgery)
24331 EL TORO RD STE 200
LAGUNA WOODS, CA 92637
Orange County (949) 586-3200
MRS. ALEXANDRIA EVE DAO RT, MR
Radiologic Technologist (Magnetic Resonance Imaging)
24331 EL TORO RD STE 200
LAGUNA WOODS, CA 92637
Orange County (949) 586-3200
DR. LONNIE J MOSKOW M.D.
Orthopaedic Surgery (Hand Surgery)
24331 EL TORO RD STE 200
LAGUNA WOODS, CA 92637
Orange County (949) 586-3200

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 Larry Gersten's NPI number?

The NPI number for Larry Gersten is 1417950064. It was assigned to this individual provider in the NPPES registry on May 27, 2005.

Where is Larry Gersten located?

Larry Gersten practices at 24331 El Toro Rd Ste 200, Laguna Woods, CA 92637. The listed phone number is (949) 586-3200.

What is Larry Gersten's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Adult Reconstructive Orthopaedic Surgery, with taxonomy code 207XS0114X.

Is Larry Gersten enrolled in Medicare?

Yes. Larry Gersten is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Larry Gersten's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Larry Gersten reassigns Medicare benefits to 2 organizations: Orthowest (Laguna Woods, CA) and South County Orthopedic Specialists (Laguna Woods, 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 Larry Gersten'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 Larry Gersten was last updated on June 19, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.