JUSTIN LARSON M.D.
NPI 1952833816
Emergency Medicine in Stony Brook, NY

Q: What is Justin Larson's NPI number?

The NPI number for Justin Larson is 1952833816. It was assigned to this individual provider in the NPPES registry on March 30, 2017.

Q: What is Justin Larson's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Q: When was this NPI record last updated?

The NPPES record for Justin Larson was last updated on August 11, 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.

Active since March 30, 2017PECOS EnrolledAccepts Medicare Assignment

101 NICOLLS RD, STONY BROOK, NY 11794(631) 689-8333 Get Directions Write a Review

NPPES record last updated: August 11, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 11, 2020, Mar 30, 2017 (2 updates tracked since 2017).

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About Justin Larson M.d. NPPES

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

JUSTIN LARSON M.D. (NPI 1952833816) is an individual emergency medicine provider in Stony Brook, New York, licensed in Illinois (036150740) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS, is affiliated with Baptist Health Medical Center - Jacksonville, and is a graduate of University Of Florida College Of Medicine (2017).

NPPES Registry Identity

NPI1952833816

Entity TypeIndividualMale

Primary Taxonomy207P00000X

Provider Legal NameJUSTIN LARSONCredential: M.D.

Location Address101 NICOLLS RDStony Brook, NY 11794-0001

Mailing Address101 Nicolls RdStony Brook, NY 11794-0001 · (631) 689-8333

Phone(631) 689-8333

Sole ProprietorNo

Medical School CMSUniversity Of Florida College Of MedicineGraduated 2017

Enumeration DateMarch 30, 2017

Last NPPES UpdateAugust 11, 20202 updates tracked since enumeration

NPPES CertifiedAugust 11, 2020

✔ NPI 1952833816 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

Licenses✔ Licensed in IL · 036150740✔ Licensed in IN · 01083756A

Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

101 NICOLLS RD, Stony Brook, NY 11794

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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

Justin Larson M.d. 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 ID5991032245

PECOS Enrollment IDI20231020000448

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 Justin Larson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Emergency Physicians Inc

874 mi

Emergency Medicine

800 PRUDENTIAL DR
Jacksonville, FL 32207

Reassigned Medicare billing, Florida enrollment
428 clinicians in this Medicare group

NPI 1285686675 (904) 396-5682

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

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with high level of medical decision making 99285

An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.

300 services295 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

260 services253 patients

Emergency department visit with moderate level of medical decision making 99284

An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.

52 services52 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

44 services44 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Baptist Health Medical Center - Jacksonville

Acute Care Hospitals · Jacksonville, FL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number100088

Location800 Prudential DrJacksonville, FL 32207 · Duval County

Emergency services Birthing friendly

Baptist Medical Center Beaches

Acute Care Hospitals · Jacksonville Beach, FL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number100117

Location1350 13th Ave SJacksonville Beach, FL 32250 · Duval County

Emergency services Birthing friendly

Baptist Medical Center - Nassau

Acute Care Hospitals · Fernandina Beach, FL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number100140

Location1250 S 18th StFernandina Beach, FL 32034 · Nassau County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11794 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

$105.06 typical visit price

range $67.40 – $203.53

Typical copayment $26.26 (range $16.85 – $50.88)

Most-billed visit code 99203

Established Patient

$117.62 typical visit price

range $21.66 – $164.45

Typical copayment $29.40 (range $5.41 – $41.11)

Most-billed visit code 99214

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.

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Internal Medicine