GREGORY S LARSEN D.O.
NPI 1104073709
Emergency Medicine in Colton, CA

Q: What is Gregory Larsen's NPI number?

The NPI number for Gregory Larsen is 1104073709. It was assigned to this individual provider in the NPPES registry on August 26, 2008.

Q: What is Gregory Larsen'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 Gregory Larsen was last updated on October 30, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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 August 26, 2008PECOS EnrolledAccepts Medicare Assignment

400 N PEPPER AVE, COLTON, CA 92324(909) 580-1000 Get Directions Write a Review

NPPES record last updated: October 30, 2009. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Gregory S Larsen D.o. NPPES

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

GREGORY S LARSEN D.O. (NPI 1104073709) is an individual emergency medicine provider in Colton, California, licensed in California (20A10521) and active in the NPI registry since August 2008. He is enrolled in Medicare PECOS and is a graduate of Other (2007).

NPPES Registry Identity

NPI1104073709

Entity TypeIndividualMale

Primary Taxonomy207P00000X

Provider Legal NameGREGORY S LARSENCredential: D.O.

Location Address400 N PEPPER AVEColton, CA 92324-1801

Mailing Address312 Notre Dame RdClaremont, CA 91711-5136 · (909) 399-3609

Phone(909) 580-1000

Sole ProprietorNo

Medical School CMSOtherGraduated 2007

Enumeration DateAugust 26, 2008

Last NPPES UpdateOctober 30, 2009

✔ NPI 1104073709 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in CA · 20A10521

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.

400 N PEPPER AVE, Colton, CA 92324

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Gregory S Larsen D.o. 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 ID2163568759

PECOS Enrollment IDI20091013000382

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.

Areas of Expertise CMS Part B claims 6

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 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.

383 services337 patients

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.

323 services290 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.

109 services101 patients

Emergency department visit with low level of medical decision making 99283

An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.

56 services56 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.

24 services23 patients

Simple repair of surface wound of scalp, neck, underarms, trunk, arms, or legs, 2.6-7.5 cm 12002

This is a procedure to mend a surface wound measuring between 2.6-7.5 cm on your scalp, neck, underarms, trunk, arms, or legs. It involves cleaning, closing and dressing the wound to promote healing and prevent infection.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92324 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

$91.88 typical visit price

range $59.60 – $179.42

Typical copayment $22.97 (range $14.90 – $44.85)

Most-billed visit code 99203

Established Patient

$104.64 typical visit price

range $19.37 – $146.42

Typical copayment $26.16 (range $4.84 – $36.60)

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.

CATHERINE J CALHOUN

Licensed Psychiatric Technician