Individual provider

Natalie Larsen, RDN, LDN

Registered Dietitian Medicare enrolled

Natalie Larsen, RDN, LDN is a Registered Dietitian in Lisle, IL, registered under NPI 1790548899.

Getting there

The practice address on file is 650 WARRENVILLE RD STE 100, Lisle, IL 60532. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.

650 WARRENVILLE RD STE 100, Lisle, IL 60532 Open in Google Maps →

Credentials and Medicare

State licence
LicenceStateSpecialty
164.010088 IL Registered Dietitian primary
5343-29 WI Registered Dietitian
86359191 AZ Registered Dietitian
DT90573 TX Registered Dietitian
86359191 CO Registered Dietitian
86359191 VA Registered Dietitian
86359191 MI Registered Dietitian
86359191 NJ Registered Dietitian

Licences are recorded in 8 states: IL, WI, AZ, TX, CO, VA, MI, NJ. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.

Medicare (PECOS)
Status
Approved
Provider type
Practitioner - Registered Dietitian Or Nutrition Professional
PAC ID
8325569452
Enrollment ID
I20250305003241

Medicare enrolment is recorded as approved under the provider type Practitioner - Registered Dietitian Or Nutrition Professional. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.

Licensed in 8 states

This provider holds licences in 8 states: Arizona, Colorado, Illinois, Michigan, New Jersey, Texas, Virginia and Wisconsin. The practice address on file is in Lisle, IL, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.

AZ Arizona
Licence
86359191
Specialty
Registered Dietitian
Verify with the AZ board →
CO Colorado
Licence
86359191
Specialty
Registered Dietitian
Verify with the CO board →
IL Illinois practice address
Licence
164.010088
Specialty
Registered Dietitian
Verify with the IL board →
MI Michigan
Licence
86359191
Specialty
Registered Dietitian
Verify with the MI board →
NJ New Jersey
Licence
86359191
Specialty
Registered Dietitian
Verify with the NJ board →
TX Texas
Licence
DT90573
Specialty
Registered Dietitian
Verify with the TX board →
VA Virginia
Licence
86359191
Specialty
Registered Dietitian
Verify with the VA board →
WI Wisconsin
Licence
5343-29
Specialty
Registered Dietitian
Verify with the WI board →

Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.

What Dietitian, Registered covers

A Registered Dietitian (RD)/Registered Dietitian Nutritionist (RDN) is an individual uniquely trained in the science of nutrition and practice of dietetics to design and provide medical nutrition therapy (MNT) and other evidence-based applications of the Nutrition Care Process (NCP) that exemplify the profession's systematic approach to providing high quality nutrition care. Registered dietitians provide MNT for the purpose of disease prevention or management, or to treat or rehabilitate an illness, injury, or condition, with the use of specific, indicated physical and cognitive nutrition care services comprised of one or more of the following aspects of the NCP: nutrition assessment/reassessment, nutrition diagnosis, nutrition intervention (e.g., nutrition counseling, therapeutic diet ordering, and nutrition education) and nutrition monitoring and evaluation. NUCC Health Care Provider Taxonomy, code 133V00000X
Dietary & Nutritional Service Providers Dietitian, Registered

All registered taxonomy codes

This provider registers 8 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.

CodeSpecialtyLicenceState
133V00000X Registered Dietitian 164.010088 IL primary
133V00000X Registered Dietitian 5343-29 WI
133V00000X Registered Dietitian 86359191 AZ
133V00000X Registered Dietitian DT90573 TX
133V00000X Registered Dietitian 86359191 CO
133V00000X Registered Dietitian 86359191 VA
133V00000X Registered Dietitian 86359191 MI
133V00000X Registered Dietitian 86359191 NJ

The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.

Full NPPES record

An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.

NPI1790548899 valid check digit
Entity typeIndividual (NPI-1)
Enumeration dateFeb 1, 2024
Last updatedMar 26, 2026
StatusActive
Sole proprietorNo
CredentialRDN, LDN
Practice address 650 WARRENVILLE RD STE 100
Lisle, IL 60532
(847) 318-3013
Fax (833) 290-5413
Mailing address 17060 DALLAS PKWY STE 112
Dallas, TX 75248
This record was updated on Mar 26, 2026, which is recent enough that the contact details are likely still accurate.

Number check

1790548899 passes the NPI check digit test The final digit 9 matches the value computed from the first nine digits, so this is a well-formed NPI.
How the check works, step by step

Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.

Digit 8 0 8 4 0 1 7 9 0 5 4 8 8 9
Doubled? ×2 ×2 ×2 ×2 ×2 ×2 ×2
Value 8 0 8 8 0 2 7 9 0 1 4 7 8 9

Sum = 71 · next multiple of 10 = 80 · check digit = 9 · actual last digit = 9

A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.

Common questions

What is NPI number 1790548899?
NPI 1790548899 is the National Provider Identifier assigned to Natalie Larsen, RDN, LDN in Lisle, IL. It is a 10-digit number issued by the Centers for Medicare & Medicaid Services and used on claims, referrals, and prescriptions to identify the provider.
What does Registered Dietitian cover?
A Registered Dietitian (RD)/Registered Dietitian Nutritionist (RDN) is an individual uniquely trained in the science of nutrition and practice of dietetics to design and provide medical nutrition therapy (MNT) and other evidence-based applications of the Nutrition Care Process (NCP) that exemplify the profession's…
How do I contact Natalie Larsen, RDN, LDN?
The phone number on file with NPPES is (847) 318-3013, last updated Mar 26, 2026. Because NPPES is only updated when a provider files a change, call ahead to confirm the number and the current practice address before visiting.
Does Natalie Larsen, RDN, LDN accept Medicare?
This NPI has an approved Medicare enrolment in PECOS, which means the provider is enrolled to bill Medicare. Enrolment does not guarantee they are accepting new Medicare patients — verify directly with the office.
Is NPI 1790548899 a valid number?
Yes. 1790548899 passes the Luhn check digit validation that CMS uses for NPI numbers, and it resolves to an active record in the registry.
How to use this page. Everything here comes from public federal records. Tips Health does not verify quality of care, confirm that a licence is currently active, or check malpractice history, and accepts no fees for placement. A listing is not a recommendation. Verify independently before seeking care.