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DR. ISABEL DENNAHY
NPI 1750841581
Surgery in Santa Monica, CA

Active since March 19, 2019PECOS Enrolled
2200 SANTA MONICA BLVD, SANTA MONICA, CA 90404(310) 449-5291 Get Directions Write a Review

NPPES record last updated: August 6, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Aug 6, 2026, Jul 22, 2026, Sep 24, 2024 and 4 more (7 updates tracked since 2019).

About Dr. Isabel Dennahy NPPES

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

DR. ISABEL DENNAHY (NPI 1750841581) is an individual surgery provider in Santa Monica, California, licensed in California (A207036) and active in the NPI registry since March 2019. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1750841581
Entity TypeIndividualFemale
Primary Taxonomy208600000X
Provider Legal NameDR. ISABEL DENNAHY
Location Address2200 SANTA MONICA BLVDSanta Monica, CA 90404-2312
Mailing Address2200 Santa Monica BlvdSanta Monica, CA 90404-2312
Phone(310) 449-5291
Sole ProprietorYes
Enumeration DateMarch 19, 2019
Last NPPES UpdateAugust 6, 20267 updates tracked since enumeration
NPPES CertifiedAugust 6, 2026
✔ NPI 1750841581 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in CA · A207036
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
2200 SANTA MONICA BLVD, Santa Monica, CA 90404
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Isabel Dennahy 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 Reassignment

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

Providence Saint Johns Medical Foundation
0.1 mi
Specialist
2121 SANTA MONICA BLVD
Santa Monica, CA 90404
  • Reassigned Medicare billing, California enrollment
  • 461 clinicians in this Medicare group
NPI 1770093734 (310) 582-7312

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 90404 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
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
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 9

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

BRADLEY CHARLES BANDERA MD
Surgery (Surgical Oncology)
2200 SANTA MONICA BLVD, JOHN WAYNE CANCER INSTITUTE
SANTA MONICA, CA 90404
Los Angeles County (310) 449-5249
RICARDO CARRAU, MD, INC.
Otolaryngology
2200 SANTA MONICA BLVD, 112
SANTA MONICA, CA 90404
Los Angeles County (310) 582-7312
DR. CRYSTAL ELIZABETH FANCHER M.D.
Surgery (Surgical Oncology)
2200 SANTA MONICA BLVD
SANTA MONICA, CA 90404
Los Angeles County (310) 582-7096
DR. MARIS SHANI JONES MD
Surgery
2200 SANTA MONICA BLVD
SANTA MONICA, CA 90404
Los Angeles County (310) 449-5275
DR. ADAM KHADER MD, PHD
Surgery
2200 SANTA MONICA BLVD
SANTA MONICA, CA 90404
Los Angeles County (310) 449-5258
MRS. NANCY MCLAUGHLIN MD, PHD, FRCSC
Neurological Surgery
2200 SANTA MONICA BLVD
SANTA MONICA, CA 90404
Los Angeles County (310) 582-7450
DR. NEFERTITI ADUNNI BROWN M.D.
Surgery (Surgical Oncology)
2200 SANTA MONICA BLVD
SANTA MONICA, CA 90404
Los Angeles County (310) 998-3989
DR. CONNIE GING TING CHIU M.D.
Surgery (Surgical Oncology)
2200 SANTA MONICA BLVD
SANTA MONICA, CA 90404
Los Angeles County (310) 449-5268

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 Isabel Dennahy's NPI number?

The NPI number for Isabel Dennahy is 1750841581. It was assigned to this individual provider in the NPPES registry on March 19, 2019.

Where is Isabel Dennahy located?

Isabel Dennahy practices at 2200 Santa Monica Blvd, Santa Monica, CA 90404. The listed phone number is (310) 449-5291.

What is Isabel Dennahy's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Isabel Dennahy enrolled in Medicare?

Yes. Isabel Dennahy is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Isabel Dennahy's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Isabel Dennahy reassigns Medicare benefits to Providence Saint Johns Medical Foundation (Santa Monica, 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 Isabel Dennahy'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 Isabel Dennahy was last updated on August 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.