NPPES file of Aug 9, 2026

Gretchen Collins, RD, LDN

Registered Dietitian · Barrington, IL

Gretchen Collins, RD, LDN is a registered dietitian with a practice address in Barrington, Illinois, and NPI 1912163965, issued on Jul 30, 2008. Check the license (Illinois 164001545, as entered in NPPES) with the Illinois board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1912163965
Name
Gretchen Collins
Credential
RD, LDN
Primary taxonomy
Registered Dietitian 133V00000X
License number
164001545 IL
Self-reported in NPPES; status is on the state search
Practice location
450 W Highway 22, Barrington, IL 60010
Phone
(847) 381-0123
Enumerated
Jul 30, 2008
Record last updated
Jul 30, 2008 (not updated in 18 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest registered dietitian records → All 2,870 in Illinois → Look up another NPI →

Also registered at 450 W Highway 22

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Mohammad Anwar, MDNeonatal-Perinatal Medicine Physician1164635165
  2. Scott Asselmeier, M.D.Vascular & Interventional Radiology Physician1558563213
  3. Danielle BanksRegistered Dietitian1659245405
  4. Todd Bannen, M.D.Emergency Medicine Physician1952414682
  5. Tina Marie Bauman, RN, MSN, APN, AGN-BCClinical Nurse Specialist1407349343
  6. Eric Bessonny, M.D.Anesthesiology Physician1336147156

Verify Gretchen Collins in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 164001545    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Illinois license search

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Gretchen Collins among 2,870 registered dietitian records in Illinois

Gretchen Collins, RD, LDN is one of 2,870 registered dietitian records with a practice address in Illinois. 8% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2008, is newer than 16% of them.

  • NPI issued2008 · 16% of these records are older, 81% newer
  • In a Medicare fileNo · 8% of these records are
  • In the CMS Doctors and Clinicians fileNo · 9% of these records are
  • Record last updated2008 · 59% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 133V00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

22 registered dietitian records list a practice address in Barrington

They are 22 of the 756 NPPES records with a practice address in Barrington, and 2,870 registered dietitian records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 2,870 in Illinois → Every provider in Barrington → Registered Dietitian nationwide →

The 8 registered dietitian records with the nearest ZIP codes

  1. Laura Bykowski, RD, LDNBarrington, IL 600101881863660
  2. Robert CarraraBarrington, IL 600101003045931
  3. Tamma Carrubba, RD,LDNBarrington, IL 600101225424773
  4. Amy Gross, MPH, RD, LDN, IBCLCLake Barrington, IL 600101376838565
  5. Dawn Herbig, RDN, LDNBarrington, IL 600101881081826
  6. Katherine Kleyn, RDBarrington, IL 600101881840957
  7. Melodi Peters, R.D. LDNBarrington, IL 600101245549039
  8. Gayle Pichlik, RD, LDNBarrington, IL 600101891964672

Common questions

What is Gretchen Collins, RD, LDN's NPI number?

Gretchen Collins, RD, LDN's National Provider Identifier (NPI) is 1912163965, issued on Jul 30, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Gretchen Collins, RD, LDN located?

The NPPES record lists a practice address at 450 W Highway 22, Barrington, IL, 60010. Phone: (847) 381-0123. Providers update this record themselves, so call before visiting.

How can I verify Gretchen Collins, RD, LDN's license?

NPPES lists Illinois license number 164001545, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.