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DR. LARISSA CHARTRAND M.D.
NPI 1851715627
Internal Medicine in Fairfield, CA

Active since February 13, 2014PECOS EnrolledAccepts Medicare Assignment
4520 BUSINESS CENTER DRIVE, 200, FAIRFIELD, CA 94534(707) 646-5500 Get Directions Write a Review

NPPES record last updated: July 7, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 7, 2025, Nov 9, 2018 (2 updates tracked since 2018).

About Dr. Larissa Chartrand M.d. NPPES

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

DR. LARISSA CHARTRAND M.D. (NPI 1851715627) is an individual internal medicine provider in Fairfield, California, licensed in Florida (ME 120869) and active in the NPI registry since February 2014. She is enrolled in Medicare PECOS and is a graduate of Other (2014).

NPPES Registry Identity

NPI1851715627
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. LARISSA CHARTRANDCredential: M.D.
Location Address4520 BUSINESS CENTER DRIVE, 200Fairfield, CA 94534
Mailing Address4500 Business Center DrFairfield, CA 94534-6888 · (707) 646-3286 · Fax (707) 646-4886
Phone(707) 646-5500
Sole ProprietorYes
Medical School CMSOtherGraduated 2014
Enumeration DateFebruary 13, 2014
Last NPPES UpdateJuly 7, 20252 updates tracked since enumeration
NPPES CertifiedJune 24, 2025
✔ NPI 1851715627 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in FL · ME 120869
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
4520 BUSINESS CENTER DRIVE, Fairfield, CA 94534
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Other Names 1

Former Name (1)Dr. Larissa Hernandez Md

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

Dr. Larissa Chartrand 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 ID3274754239
PECOS Enrollment IDI20201125001433
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 10

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
467 services168 patients
Online digital evaluation and management service for an established patient for up to 7 days, total time 5-10 minutes 99421
This service involves a week-long digital assessment of your health status. It's conducted online by your healthcare provider, focusing on managing your existing health condition. The process takes 5-10 minutes of your time daily, ensuring optimal health management.
101 services68 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
67 services67 patients
Face-to-face behavioral counseling for obesity, 15 minutes G0447
This is a 15-minute consultation where a healthcare professional discusses your eating habits, physical activity, and goals to help manage your weight. The aim is to provide personalized strategies to promote a healthier lifestyle and combat obesity.
53 services40 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
47 services40 patients
Injection of drug or substance under skin or into muscle 96372
This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.
36 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94534 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
$145.83 typical visit price
range $65.02 – $191.95
Typical copayment $36.45 (range $16.25 – $47.98)
Most-billed visit code 99204
Established Patient
$113.05 typical visit price
range $21.86 – $157.69
Typical copayment $28.26 (range $5.46 – $39.42)
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 4

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

LAURIE BRESEE
Nurse Practitioner (Family)
4520 BUSINESS CENTER DRIVE, SUITE 180
FAIRFIELD, CA 94534
Solano County (707) 646-3555
NORTHBAY HEALTHCARE GROUP
Home Health
4520 BUSINESS CENTER DRIVE, SUITE 160
FAIRFIELD, CA 94534
Solano County (707) 646-3575
DR. AMBER MARIE STIRLEN PSY.D.
Psychologist (Clinical)
4520 BUSINESS CENTER DRIVE, SUITE 200
FAIRFIELD, CA 94534
Solano County (707) 646-3534
EHSAN GHODS D.O.
Family Medicine
4520 BUSINESS CENTER DRIVE, SUITE 200
FAIRFIELD, CA 94534
Solano County (707) 646-3500

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 Larissa Chartrand's NPI number?

The NPI number for Larissa Chartrand is 1851715627. It was assigned to this individual provider in the NPPES registry on February 13, 2014. The provider is also known as Dr. Larissa Hernandez MD.

Where is Larissa Chartrand located?

Larissa Chartrand practices at 4520 Business Center Drive 200, Fairfield, CA 94534. The listed phone number is (707) 646-5500.

What is Larissa Chartrand's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Larissa Chartrand enrolled in Medicare?

Yes. Larissa Chartrand 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.

When was this NPI record last updated?

The NPPES record for Larissa Chartrand was last updated on July 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.