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GREGORY DECLARK D.C.
NPI 1699288837
Chiropractor in Elmhurst, IL

Active since November 09, 2017Accepts Medicare Assignment
477 S SPRING RD, ELMHURST, IL 60126(630) 530-0506 Get Directions Write a Review

NPPES record last updated: July 1, 2019. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 1, 2019, Nov 9, 2017 (2 updates tracked since 2017).

About Gregory Declark D.c. NPPES

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

GREGORY DECLARK D.C. (NPI 1699288837) is an individual chiropractor in Elmhurst, Illinois, licensed in Illinois (038.013094) and active in the NPI registry since November 2017. He is a graduate of Palmer College Chiropractic - Davenport (2016).

NPPES Registry Identity

NPI1699288837
Entity TypeIndividualMale
Primary Taxonomy111N00000X
Provider Legal NameGREGORY DECLARKCredential: D.C.
Location Address477 S SPRING RDElmhurst, IL 60126-3857
Mailing Address477 S Spring RdElmhurst, IL 60126-3857
Phone(630) 530-0506
Sole ProprietorNo
Medical School CMSPalmer College Chiropractic - DavenportGraduated 2016
Enumeration DateNovember 9, 2017
Last NPPES UpdateJuly 1, 20192 updates tracked since enumeration
✔ NPI 1699288837 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyChiropractorChiropractic Providers
Taxonomy Code111N00000X
License✔ Licensed in IL · 038.013094
Definition
A provider qualified by a Doctor of Chiropractic (D.C.), licensed by the State and who practices chiropractic medicine -that discipline within the healing arts which deals with the nervous system and its relationship to the spinal column and its interrelationship with other body systems.
477 S SPRING RD, Elmhurst, IL 60126
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Gregory Declark D.c. 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 ID3577896984
PECOS Enrollment IDI20190617002304

Medicare Billing Reassignment

Medicare enrollment records show Gregory Declark reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Adapt Chiropractic, Ltd.
Same address
Chiropractor
477 S SPRING RD
Elmhurst, IL 60126
  • Reassigned Medicare billing, Illinois enrollment
NPI 1881152536 (630) 484-1761

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims

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.

Chiropractic manipulative treatment, 3-4 spinal regions 98941
Chiropractic manipulative treatment for 3-4 spinal regions involves a trained professional applying controlled force to specific areas of your spine. This can help alleviate pain, improve physical function, and support your body's natural healing process.
169 services11 patients

Other Providers at the Same Location NPPES 6

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

RUSSELL HEALTH AND WELLNESS CENTER, SC
Chiropractor
477 S SPRING RD
ELMHURST, IL 60126
Dupage County (630) 530-0506
DR. CORINA RADU D.M.D.
Dentist (Orthodontics and Dentofacial Orthopedics)
477 S SPRING RD
ELMHURST, IL 60126
Dupage County (630) 279-5345
EMK HEALTHCARE LTD
Clinic/Center
477 S SPRING RD
ELMHURST, IL 60126
Dupage County (800) 862-5914
RUSSELL CHIROPRACTIC CARE, SC
Chiropractor (Orthopedic)
477 S SPRING RD
ELMHURST, IL 60126
Dupage County (630) 530-0506
ADAPT CHIROPRACTIC, LTD.
Chiropractor
477 S SPRING RD
ELMHURST, IL 60126
Dupage County (630) 484-1761
INTEGRATIVE HEALTHCARE ASSOCIATES LTD
Chiropractor
477 S SPRING RD
ELMHURST, IL 60126
Dupage County (800) 862-5914

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 Gregory Declark's NPI number?

The NPI number for Gregory Declark is 1699288837. It was assigned to this individual provider in the NPPES registry on November 9, 2017.

Where is Gregory Declark located?

Gregory Declark practices at 477 S Spring Rd, Elmhurst, IL 60126. The listed phone number is (630) 530-0506.

What is Gregory Declark's specialty?

The primary specialty registered for this NPI is Chiropractor with taxonomy code 111N00000X.

Is Gregory Declark enrolled in Medicare?

Yes. Gregory Declark 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.

Which organization bills Medicare for Gregory Declark's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Declark reassigns Medicare benefits to Adapt Chiropractic, Ltd. (Elmhurst, IL). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gregory Declark's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Gregory Declark was last updated on July 1, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.