Donald Chaffin, MD
NPI 1689633109 · Anatomic Pathology & Clinical Pathology Physician · Greeley, CO
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Donald Chaffin, MD is a Anatomic Pathology & Clinical Pathology Physician provider in Greeley, CO (NPI 1689633109).
Provider details
- NPI number
- 1689633109
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 37647 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 11175 Campus StLoma Linda, CA 92350-1700Phone: (909) 558-9759
Registry dates
- Enumerated
- 2006-03-22
- Last updated
- 2025-05-14
- Certified
- 2025-05-14
Frequently asked questions
- What is Donald Chaffin's NPI number?
- Donald Chaffin's National Provider Identifier (NPI) is 1689633109, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Donald Chaffin's specialty?
- Donald Chaffin is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Donald Chaffin located?
- Donald Chaffin's practice location on file with NPPES is 1801 16th St, Greeley, CO 80631-5154.
- What is Donald Chaffin's phone number?
- The practice phone number listed in the NPPES registry for Donald Chaffin is (970) 350-6720.
- Does Donald Chaffin accept Medicare?
- Donald Chaffin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Donald Chaffin's NPI active?
- Yes — Donald Chaffin's NPI (1689633109) is active in the NPPES registry as of the last update on 2025-05-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.