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

CHELSEA LARSON
NPI 1770087595
Nurse Practitioner in Wilmington, DE

Active since March 19, 2018PECOS EnrolledAccepts Medicare Assignment
125 S WEST ST, WILMINGTON, DE 19801(302) 428-4475(302) 428-4480 Get Directions Write a Review

NPPES record last updated: July 2, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Oct 18, 2023, Nov 8, 2021, Oct 11, 2021 and 1 more (4 updates tracked since 2018).

About Chelsea Larson NPPES

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

CHELSEA LARSON (NPI 1770087595) is an individual nurse practitioner in Wilmington, Delaware, licensed in Pennsylvania (SP018599) and active in the NPI registry since March 2018. She is enrolled in Medicare PECOS, is affiliated with Hospital Of Univ Of Pennsylvania, and is a graduate of Other (2017).

NPPES Registry Identity

NPI1770087595
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameCHELSEA LARSON
Location Address125 S WEST STWilmington, DE 19801-5014
Mailing Address125 S West StWilmington, DE 19801-5014 · (302) 428-4475
Fax(302) 428-4480
Sole ProprietorNo
Medical School CMSOtherGraduated 2017
Enumeration DateMarch 19, 2018
Last NPPES UpdateJuly 2, 20264 updates tracked since enumeration
NPPES CertifiedJuly 2, 2026
NPI 1770087595 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
Licenses Licensed in PA · SP018599 Licensed in DE · LG-0001144
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License LG-0001144 (DE)
125 S WEST ST, Wilmington, DE 19801

Other Names 1

Former Name (1)Chelsea Ross

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

Chelsea Larson 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 ID7911259932
PECOS Enrollment IDI20181002002647
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.

Hospital Affiliations CMS Care Compare 3

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

Hospital Of Univ Of Pennsylvania

Acute Care Hospitals · Philadelphia, PA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390111
Location34th & Spruce StsPhiladelphia, PA 19104 · Philadelphia County
Emergency services Birthing friendly

Paoli Hospital

Acute Care Hospitals · Paoli, PA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390153
Location255 West Lancaster AvenuePaoli, PA 19301 · Chester County
Emergency services Birthing friendly

Chester County Hospital

Acute Care Hospitals · West Chester, PA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390179
Location701 East Marshall StreetWest Chester, PA 19380 · Chester County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 19801 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
$88.37 typical visit price
range $57.12 – $173.08
Typical copayment $22.09 (range $14.28 – $43.27)
Most-billed visit code 99203
Established Patient
$100.68 typical visit price
range $18.36 – $141.05
Typical copayment $25.17 (range $4.59 – $35.26)
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 2

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

Family Medicine
125 S WEST ST
WILMINGTON, DE 19801
Nurse Practitioner (Family)
125 S WEST ST
WILMINGTON, DE 19801

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 Chelsea Larson's NPI number?

The NPI number for Chelsea Larson is 1770087595. It was assigned to this individual provider in the NPPES registry on March 19, 2018. The provider is also known as Chelsea Ross.

Where is Chelsea Larson located?

Chelsea Larson practices at 125 S West St, Wilmington, DE 19801. The listed phone number is (302) 428-4475.

What is Chelsea Larson's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Chelsea Larson enrolled in Medicare?

Yes. Chelsea Larson 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.

Is Chelsea Larson affiliated with any hospitals?

According to CMS data, Chelsea Larson is affiliated with Hospital Of Univ Of Pennsylvania, Paoli Hospital and Chester County Hospital.

When was this NPI record last updated?

The NPPES record for Chelsea Larson was last updated on July 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 40 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.