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DR. DONALD JOE CHAFFIN MD
NPI 1689633109
Pathology - Anatomic Pathology & Clinical Pathology in Greeley, CO

Active since March 22, 2006PECOS Enrolled
1801 16TH ST, GREELEY, CO 80631(970) 350-6720(970) 350-6477 Get Directions Write a Review

NPPES record last updated: May 14, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Donald Joe Chaffin Md NPPES

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

DR. DONALD JOE CHAFFIN MD (NPI 1689633109) is an individual anatomic pathology & clinical pathology provider in Greeley, Colorado, licensed in Colorado (37647) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Loma Linda.

NPPES Registry Identity

NPI1689633109
Entity TypeIndividualMale
Primary Taxonomy207ZP0102X
Provider Legal NameDR. DONALD JOE CHAFFINCredential: MD
Location Address1801 16TH STGreeley, CO 80631-5154
Mailing AddressPo Box 30309Charleston, SC 29417-0309 · (843) 554-9300 · Fax (843) 566-8780
Phone(970) 350-6720
Fax(970) 350-6477
Sole ProprietorNo
Enumeration DateMarch 22, 2006
Last NPPES UpdateMay 14, 2025
NPPES CertifiedMay 14, 2025
✔ NPI 1689633109 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0102X
Licenses✔ Licensed in CO · 37647✔ Licensed in CA · G88549
Definition
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
Also ListedPathology · Blood Banking & Transfusion MedicineTaxonomy 207ZB0001X · License G88549 (CA), 37647 (CO)
1801 16TH ST, Greeley, CO 80631
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Secondary Practice Location 1

Location 111175 Campus StLoma Linda, CA 92350-1700 · Phone (909) 558-9759

Other Identifiers 1

Medicaid08156328CO

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Donald Joe Chaffin Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignments

2

Medicare enrollment records show Donald Chaffin reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Faculty Physicians And Surgeons Of Llusm
639 mi
Transplant Surgery
2020 WELLNESS WAY, STE 506
Las Vegas, NV 89106
  • Reassigned Medicare billing, California enrollment
  • 2,584 clinicians in this Medicare group
NPI 1124560214 (909) 558-3636
Loma Linda University Pathology Medical Group, Inc.
818 mi
Anatomic Pathology
11234 ANDERSON ST
Loma Linda, CA 92354
  • Reassigned Medicare billing, California enrollment
  • 33 clinicians in this Medicare group
NPI 1205881026 (909) 558-2304

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80631 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
$132.55 typical visit price
range $58.06 – $174.82
Typical copayment $33.13 (range $14.51 – $43.70)
Most-billed visit code 99204
Established Patient
$102.03 typical visit price
range $18.88 – $142.79
Typical copayment $25.50 (range $4.72 – $35.69)
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 20

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

DR. SHELDON GREGORY STADNYK M.D.
Internal Medicine
1801 16TH ST
GREELEY, CO 80631
Weld County (970) 350-6002
KAITLYN ELIZABETH RUNNELS RN
Nurse Practitioner (Neonatal)
1801 16TH ST
GREELEY, CO 80631
Weld County (970) 810-4121
NCMC SPECIALTY CLINIC
Clinic/Center (Multi-Specialty)
1801 16TH ST
GREELEY, CO 80631
Weld County (970) 378-4475
JACOB BERNSTEIN
Neurological Surgery
1801 16TH ST
GREELEY, CO 80631
Weld County (970) 810-5996
JARAH ADRIANNA GRASHORN
Social Worker (Clinical)
1801 16TH ST
GREELEY, CO 80631
Weld County (970) 810-2044
MARGARET ELISABETH WILSON
Nurse Anesthetist, Certified Registered
1801 16TH ST
GREELEY, CO 80631
Weld County (517) 740-0386
ATRIUM APOTHECARY
Pharmacy (Community/Retail Pharmacy)
1801 16TH ST
GREELEY, CO 80631
Weld County (970) 378-4500
ADVANCED PRACTITIONERS OF COLORADO, PC
Emergency Medicine
1801 16TH ST
GREELEY, CO 80631
Weld County (970) 352-6644

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 Donald Chaffin's NPI number?

The NPI number for Donald Chaffin is 1689633109. It was assigned to this individual provider in the NPPES registry on March 22, 2006.

Where is Donald Chaffin located?

Donald Chaffin practices at 1801 16th St, Greeley, CO 80631. The listed phone number is (970) 350-6720.

What is Donald Chaffin's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Donald Chaffin enrolled in Medicare?

Yes. Donald Chaffin is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Donald Chaffin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Donald Chaffin reassigns Medicare benefits to 2 organizations: Faculty Physicians And Surgeons Of Llusm (Las Vegas, NV) and Loma Linda University Pathology Medical Group, Inc. (Loma Linda, CA). Each 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 Donald Chaffin'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 Donald Chaffin was last updated on May 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months 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.