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DR. THEODORE J SIFONTES MD
NPI 1851311658
Ophthalmology in Mount Vernon, NY

Active since July 21, 2006PECOS EnrolledAccepts Medicare Assignment
107 W 4TH ST, MOUNT VERNON, NY 10550(914) 699-7200(914) 699-0837 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 21, 2022, Jul 5, 2017, Sep 28, 2015 (3 updates tracked since 2015).

About Dr. Theodore J Sifontes Md NPPES

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

DR. THEODORE J SIFONTES MD (NPI 1851311658) is an individual ophthalmology provider in Mount Vernon, New York, licensed in New York (169644) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1984).

NPPES Registry Identity

NPI1851311658
Entity TypeIndividualMale
Primary Taxonomy207W00000X
Provider Legal NameDR. THEODORE J SIFONTESCredential: MD
Location Address107 W 4TH STMount Vernon, NY 10550-4002
Mailing Address107 W 4th StMount Vernon, NY 10550-4002 · (914) 699-7200 · Fax (914) 699-0837
Phone(914) 699-7200
Fax(914) 699-0837
Sole ProprietorYes
Medical School CMSOtherGraduated 1984
Enumeration DateJuly 21, 2006
Last NPPES UpdateJuly 21, 20223 updates tracked since enumeration
✔ NPI 1851311658 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians
Taxonomy Code207W00000X
License✔ Licensed in NY · 169644
Definition
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
107 W 4TH ST, Mount Vernon, NY 10550
Open in Google Maps ↗

Other Identifiers 1

Medicaid01553626NY

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Louisiana, Blue Cross Blue Shield of Wyoming.Insurance ›

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

Dr. Theodore J Sifontes Md 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 ID9537104922
PECOS Enrollment IDI20050627000374
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 Theodore Sifontes reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Mount Vernon Neighborhood Health Center Inc
Same address
Specialist
107 W 4TH ST, ADMINISTRATION
Mount Vernon, NY 10550
  • Reassigned Medicare billing, New York enrollment
  • 108 clinicians in this Medicare group
NPI 1295912541 (914) 699-7200

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 10550 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
$154.28 typical visit price
range $67.40 – $203.53
Typical copayment $38.57 (range $16.85 – $50.88)
Most-billed visit code 99204
Established Patient
$83.44 typical visit price
range $21.66 – $164.45
Typical copayment $20.86 (range $5.41 – $41.11)
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.

MS. DEEPTHI SARA SONY MD
Internal Medicine
107 W 4TH ST, ADMINISTRATION
MOUNT VERNON, NY 10550
Westchester County (914) 699-7200
MS. JULIE ANNE TYLER MIDWIFE
Midwife
107 W 4TH ST
MOUNT VERNON, NY 10550
Westchester County (914) 699-7200
RL MT VERNON PHARMACY INC
Pharmacy (Community/Retail Pharmacy)
107 W 4TH ST
MOUNT VERNON, NY 10550
Westchester County (914) 699-0235
CHRISTOPHER LEE NOLEN MSW
Social Worker
107 W 4TH ST
MOUNT VERNON, NY 10550
Westchester County (914) 530-3674
JONIQUE NURSE CNM
Midwife
107 W 4TH ST
MOUNT VERNON, NY 10550
Westchester County (914) 699-7200
DR. ANHTHO TRAN KASHYAP MD
Obstetrics & Gynecology
107 W 4TH ST
MOUNT VERNON, NY 10550
Westchester County (914) 699-7200
NATALIE SOFIA MONTANEZ PA-C
Physician Assistant
107 W 4TH ST
MOUNT VERNON, NY 10550
Westchester County (914) 699-7200
ASHLEY D AKHTER AHNP
Nurse Practitioner (Adult Health)
107 W 4TH ST
MOUNT VERNON, NY 10550
Westchester County (914) 699-7200

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 Theodore Sifontes's NPI number?

The NPI number for Theodore Sifontes is 1851311658. It was assigned to this individual provider in the NPPES registry on July 21, 2006.

Where is Theodore Sifontes located?

Theodore Sifontes practices at 107 W 4th St, Mount Vernon, NY 10550. The listed phone number is (914) 699-7200.

What is Theodore Sifontes's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is Theodore Sifontes enrolled in Medicare?

Yes. Theodore Sifontes 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 Theodore Sifontes's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Theodore Sifontes reassigns Medicare benefits to Mount Vernon Neighborhood Health Center Inc (Mount Vernon, NY). 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 Theodore Sifontes's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Theodore Sifontes accept?

Health plans from Blue Cross Blue Shield of Wyoming and Blue Cross and Blue Shield of Louisiana list Theodore Sifontes as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Theodore Sifontes was last updated on July 21, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.