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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. MARC J. GROSS D.D.S.
NPI 1689615130
Dentist - Periodontics in Encino, CA

Active since June 08, 2006Opted out of Medicare · through Feb 29, 2028
5400 BALBOA BLVD, ENCINO, CA 91316(818) 990-5220(818) 990-5621 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Marc J. Gross D.d.s. NPPES

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

DR. MARC J. GROSS D.D.S. (NPI 1689615130) is an individual periodontics provider in Encino, California, licensed in California (DX35724) and active in the NPI registry since June 2006. He has opted out of Medicare through February 29, 2028 and remains eligible to order and refer.

NPPES Registry Identity

NPI1689615130
Entity TypeIndividualMale
Primary Taxonomy1223P0300X
Provider Legal NameDR. MARC J. GROSSCredential: D.D.S.
Location Address5400 BALBOA BLVDEncino, CA 91316-1502
Mailing Address5400 Balboa BlvdEncino, CA 91316-5229 · (818) 990-5220 · Fax (818) 990-5621
Phone(818) 990-5220
Fax(818) 990-5621
Sole ProprietorNo
Enumeration DateJune 8, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1689615130 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · PeriodonticsDental Providers
Taxonomy Code1223P0300X
License✔ Licensed in CA · DX35724
Definition
That specialty of dentistry which encompasses the prevention, diagnosis and treatment of diseases of the supporting and surrounding tissues of the teeth or their substitutes and the maintenance of the health, function and esthetics of these structures and tissues.
5400 BALBOA BLVD, Encino, CA 91316
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

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Opted out of Medicare

Dr. Marc J. Gross D.d.s. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from February 28, 2016 through February 29, 2028.

Opt-Out Effective DateFebruary 28, 2016
Opt-Out In Effect ThroughFebruary 29, 2028Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency– Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91316 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 20

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

DAN BLECHMAN MD INC
Anesthesiology
5400 BALBOA BLVD, #111
ENCINO, CA 91316
Los Angeles County (818) 784-8975
SLEEPMED THERAPIES, INC
Durable Medical Equipment & Medical Supplies
5400 BALBOA BLVD, STE 217
ENCINO, CA 91316
Los Angeles County (818) 817-9870
HARVEY S KULBER MD
Otolaryngology
5400 BALBOA BLVD, 120
ENCINO, CA 91316
Los Angeles County (818) 788-0560
DR. MILTON LEON KOLCHINS M.D.
Pediatrics
5400 BALBOA BLVD, SUITE # 105
ENCINO, CA 91316
Los Angeles County (818) 789-0347
SLEEPMED OF CALIFORNIA
Durable Medical Equipment & Medical Supplies
5400 BALBOA BLVD, SUITE 217
ENCINO, CA 91316
Los Angeles County (978) 536-7400
LEONORA FIHMAN DPM
Podiatrist (Primary Podiatric Medicine)
5400 BALBOA BLVD
ENCINO, CA 91316
Los Angeles County (818) 907-6100
DR. DAVID A FERRY M.D.
Pediatrics (Pediatric Cardiology)
5400 BALBOA BLVD, STE 202
ENCINO, CA 91316
Los Angeles County (818) 784-6269
JOHN G REZAPOUR MD
Ophthalmology
5400 BALBOA BLVD, SUITE 209
ENCINO, CA 91316
Los Angeles County (818) 205-1200

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 Marc Gross's NPI number?

The NPI number for Marc Gross is 1689615130. It was assigned to this individual provider in the NPPES registry on June 8, 2006.

Where is Marc Gross located?

Marc Gross practices at 5400 Balboa Blvd, Encino, CA 91316. The listed phone number is (818) 990-5220.

What is Marc Gross's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Periodontics, with taxonomy code 1223P0300X.

Is Marc Gross enrolled in Medicare?

No. Marc Gross has opted out of Medicare through February 29, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Marc Gross was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 30 days 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.