SETH ALLEN MATHERN M.D.
NPI 1972998110
Hospitalist in Denver, CO
About Seth Allen Mathern M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SETH ALLEN MATHERN M.D. (NPI 1972998110) is an individual hospitalist provider in Denver, Colorado, licensed in Colorado (DR.0060603) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Columbia University College Of Physicians And Surgeons (2015).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
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
Seth Allen Mathern M.d. 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.
Medicare Billing Reassignments
2Medicare enrollment records show Seth Mathern reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Denver, CO 80210
- Reassigned Medicare billing, Colorado enrollment
- 733 clinicians in this Medicare group
Denver, CO 80230
- Reassigned Medicare billing, Colorado enrollment
- 1,193 clinicians in this Medicare group
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 2
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80210 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
DENVER, CO 80210
DENVER, CO 80210
DENVER, CO 80210
DENVER, CO 80210
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 Seth Mathern's NPI number?
The NPI number for Seth Mathern is 1972998110. It was assigned to this individual provider in the NPPES registry on April 4, 2015.
Where is Seth Mathern located?
Seth Mathern practices at 2525 S Downing St, Denver, CO 80210. The listed phone number is (303) 673-7151.
What is Seth Mathern's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Seth Mathern enrolled in Medicare?
Yes. Seth Mathern 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 organizations bill Medicare for Seth Mathern's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Seth Mathern reassigns Medicare benefits to 2 organizations: Portercare Adventist Health System (Denver, CO) and Catholic Health Initiatives Colorado (Denver, CO). 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 Seth Mathern'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 Seth Mathern was last updated on September 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Seth Allen Mathern, M.D. · NPI 1972998110
Hospitalist physician in Denver, Colorado. Individual provider, active in the CMS NPPES registry since April 4, 2015.
## Identity
- **NPI:** 1972998110 (Entity type: Individual)
- **Enumerated:** April 4, 2015
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** DR.0060603 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 2525 S DOWNING ST, Denver, CO 80210-5817
- **Phone:** (303) 673-7151
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Portercare Adventist Health System (NPI 1194680702, Denver, CO); Catholic Health Initiatives Colorado (NPI 1518711290, Denver, CO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Columbia University College Of Physicians And Surgeons, class of 2015
## Record status
- **NPPES last updated:** September 4, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1972998110) · Data from the CMS NPPES public registry.