STEPHEN C ALTMIN MD
NPI 1609849991
Emergency Medicine in Fort Defiance, AZ
About Stephen C Altmin Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEPHEN C ALTMIN MD (NPI 1609849991) is an individual emergency medicine provider in Fort Defiance, Arizona, licensed in Colorado (39829) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS, is affiliated with Centura St. Catherine Hospital-garden City, and maintains a secondary practice location in Lakewood.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 8
Accepted 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
Stephen C Altmin Md 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
6Medicare enrollment records show Stephen Altmin reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fort Defiance, AZ 86504
- Reassigned Medicare billing, Texas enrollment
- 518 clinicians in this Medicare group
Durango, CO 81301
- Reassigned Medicare billing, Colorado and Kansas enrollments
- Also billed through NPI 1760415871 (Kansas)
- 468 clinicians in this Medicare group
Durango, CO 81301
- Reassigned Medicare billing, Colorado enrollment
- 285 clinicians in this Medicare group
Avon, CO 81620
- Reassigned Medicare billing, Colorado enrollment
- 352 clinicians in this Medicare group
Westminster, CO 80021
- Reassigned Medicare billing, Colorado enrollment
- 130 clinicians in this Medicare group
Hutchinson, KS 67502
- Reassigned Medicare billing, Kansas enrollment
- 47 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 4
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Centura St. Catherine Hospital-Garden City
Acute Care Hospitals · Garden City, KSPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 86504 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
FORT DEFIANCE, AZ 86504
FORT DEFIANCE, AZ 86504
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 Stephen Altmin's NPI number?
The NPI number for Stephen Altmin is 1609849991. It was assigned to this individual provider in the NPPES registry on February 8, 2006.
Where is Stephen Altmin located?
Stephen Altmin practices at Corner Of Route N12 And N7, Fort Defiance, AZ 86504. The listed phone number is (928) 729-8000.
What is Stephen Altmin's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Stephen Altmin enrolled in Medicare?
Yes. Stephen Altmin 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 Stephen Altmin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Altmin reassigns Medicare benefits to 6 organizations: The Fort Defiance Indian Hospital Board, Incorporation (Fort Defiance, AZ), Usacs Of Colorado Inc (Durango, CO), Usacs Observation Medicine Services Of Colorado Inc. (Durango, CO), Usacs Community Emergency Services Of Colorado, Inc. (Avon, CO), Premier Emergency Services, Inc (Westminster, CO) and 1 more organization, listed in the Medicare section above. 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 Stephen Altmin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Stephen Altmin accept?
Health plans from Blue Cross and Blue Shield of Kansas, Inc. list Stephen Altmin 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.
Is Stephen Altmin affiliated with any hospitals?
According to CMS data, Stephen Altmin is affiliated with Centura St. Catherine Hospital-Garden City.
When was this NPI record last updated?
The NPPES record for Stephen Altmin was last updated on January 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Stephen C Altmin, MD · NPI 1609849991
Emergency Medicine physician in Fort Defiance, Arizona. Individual provider, active in the CMS NPPES registry since February 8, 2006.
## Identity
- **NPI:** 1609849991 (Entity type: Individual)
- **Enumerated:** February 8, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 39829 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** CORNER OF ROUTE N12 AND N7, Fort Defiance, AZ 86504
- **Phone:** (928) 729-8000
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): The Fort Defiance Indian Hospital Board, Incorporation (NPI 1477876639, Fort Defiance, AZ); Usacs Of Colorado Inc (NPI 1235765074, Durango, CO); Usacs Observation Medicine Services Of Colorado Inc. (NPI 1659220663, Durango, CO); Usacs Community Emergency Services Of Colorado, Inc. (NPI 1982239042, Avon, CO); Premier Emergency Services, Inc (NPI 1962037440, Westminster, CO); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Vanderbilt University School Of Medicine, class of 1999
## Record status
- **NPPES last updated:** January 13, 2026
- **Other identifiers:** Other 20326023101; Medicaid 76275329 (CO); Other P00334740 (CO); and 5 more
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Source: [NPI Profile](https://npiprofile.com/npi/1609849991) · Data from the CMS NPPES public registry.