Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Nathan S Grigg, DO

Individual provider Internal Medicine Physician · NPI 1881214567

Nathan S Grigg, DO is a Hospitalist in Pueblo, Colorado. Qualified in 2020, 6 years ago. Practices with Poudre Valley Medical Group LLC, a 2,416-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Colorado and North Carolina.

Years since qualifying
6
Licensed in
CO, NC
In the registry since
2020
Specialties on file
5
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

400 W 16th St
Pueblo, CO 81003-2745
Phone: (719) 595-7585
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2100 Stantonsburg Rd, Greenville, NC 27834-2818 — (252) 847-3898

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 2026-04237 (NC)
Internal Medicine Physician Taxonomy 207R00000X · Licence 0008359 (CO)
Hospitalist Physician Taxonomy 208M00000X · Licence 2026-04237 (NC)
Hospitalist Physician Taxonomy 208M00000X · Licence 0008359 (CO)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X · Licence 0008359 (CO)

Record details

NPI number1881214567
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedApril 22, 2020
Last updated in NPPESSeptember 15, 2026
Certification dateSeptember 15, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHOSPITALIST
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Group practice Poudre Valley Medical Group Llc — 2416 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients255
Services billed 683 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Poudre Valley Medical Group LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2416 clinicians in the practice; 12 are shown here.

Other providers in Pueblo