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DR. GREGORY DEAN LETTMAN D.C.
NPI 1114960226
Chiropractor in Dubuque, IA

Active since June 14, 2006Accepts Medicare Assignment
2095 JOHN F KENNEDY RD, DUBUQUE, IA 52002(563) 588-9200(563) 583-6594 Get Directions Write a Review

NPPES record last updated: June 10, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Gregory Dean Lettman D.c. NPPES

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

DR. GREGORY DEAN LETTMAN D.C. (NPI 1114960226) is an individual chiropractor in Dubuque, Iowa, licensed in Iowa (06539) and active in the NPI registry since June 2006. He is a graduate of Palmer College Chiropractic - Davenport (2001).

NPPES Registry Identity

NPI1114960226
Entity TypeIndividualMale
Primary Taxonomy111N00000X
Provider Legal NameDR. GREGORY DEAN LETTMANCredential: D.C.
Location Address2095 JOHN F KENNEDY RDDubuque, IA 52002-3899
Mailing Address2095 John F Kennedy RdDubuque, IA 52002-3899 · (563) 588-9200 · Fax (563) 583-6594
Phone(563) 588-9200
Fax(563) 583-6594
Sole ProprietorNo
Medical School CMSPalmer College Chiropractic - DavenportGraduated 2001
Enumeration DateJune 14, 2006
Last NPPES UpdateJune 10, 2024
NPPES CertifiedJune 10, 2024
✔ NPI 1114960226 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyChiropractorChiropractic Providers
Taxonomy Code111N00000X
License✔ Licensed in IA · 06539
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.
2095 JOHN F KENNEDY RD, Dubuque, IA 52002
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Other Identifiers 2

Medicaid1266155IA
Other09750IA · Bluecross/blueshields

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan, Ambetter Health and more.Insurance ›

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

Dr. Gregory Dean Lettman 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 ID3173528635
PECOS Enrollment IDI20060916000067

Medicare Billing Reassignment

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

Lettman Chiropractic Rehab Care
2.0 mi
Chiropractor
1900 JFK RD SUITE 2
Dubuque, IA 52002
  • Reassigned Medicare billing, Iowa enrollment
  • 3 clinicians in this Medicare group
NPI 1811000870 (563) 588-9200

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.
421 services57 patients

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.

DR. JOHN JOSEPH ZIMMER DDS
Dentist
2095 JOHN F KENNEDY RD
DUBUQUE, IA 52002
Dubuque County (563) 557-1111
TODD CHARLES SPURLING DC
Chiropractor
2095 JOHN F KENNEDY RD
DUBUQUE, IA 52002
Dubuque County (563) 590-0416

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 Lettman's NPI number?

The NPI number for Gregory Lettman is 1114960226. It was assigned to this individual provider in the NPPES registry on June 14, 2006.

Where is Gregory Lettman located?

Gregory Lettman practices at 2095 John F Kennedy Rd, Dubuque, IA 52002. The listed phone number is (563) 588-9200.

What is Gregory Lettman's specialty?

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

Is Gregory Lettman enrolled in Medicare?

Yes. Gregory Lettman 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 Lettman's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Lettman reassigns Medicare benefits to Lettman Chiropractic Rehab Care (Dubuque, IA). 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 Lettman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Lettman accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan and Oscar Insurance Company list Gregory Lettman as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Gregory Lettman was last updated on June 10, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.