DR. HEATHER HAMMERSTEDT M.D.
NPI 1275621104
Emergency Medicine in Boise, ID
About Dr. Heather Hammerstedt M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. HEATHER HAMMERSTEDT M.D. (NPI 1275621104) is an individual emergency medicine provider in Boise, Idaho, licensed in Idaho (M10228) and active in the NPI registry since October 2006. She is enrolled in Medicare PECOS, is affiliated with Saint Alphonsus Regional Medical Center, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Other Identifiers 1
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
Dr. Heather Hammerstedt 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
9Medicare enrollment records show Heather Hammerstedt reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boise, ID 83706
- Reassigned Medicare billing, Idaho enrollment
- 781 clinicians in this Medicare group
Boise, ID 83706
- Reassigned Medicare billing, Idaho and Oregon enrollments
- Also billed through NPI 1790209898 (Oregon)
- 81 clinicians in this Medicare group
Ontario, OR 97914
- Reassigned Medicare billing, Idaho enrollment
- 67 clinicians in this Medicare group
Mccall, ID 83638
- Reassigned Medicare billing, Idaho enrollment
- 39 clinicians in this Medicare group
Baker City, OR 97814
- Reassigned Medicare billing, Oregon enrollment
- Also billed through NPI 1386636355 (Oregon)
- 47 clinicians in this Medicare group
Truckee, CA 96161
- Reassigned Medicare billing, California enrollment
- 2,323 clinicians in this Medicare group
Tacoma, WA 98405
- Reassigned Medicare billing, Washington enrollment
- 1,526 clinicians in this Medicare group
Arlington, WA 98223
- Reassigned Medicare billing, Washington enrollment
- 519 clinicians in this Medicare group
Wichita, KS 67214
- Reassigned Medicare billing, Kansas enrollment
- 108 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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Saint Alphonsus Regional Medical Center
Acute Care Hospitals · Boise, IDSaint Alphonsus Medical Center - Nampa
Acute Care Hospitals · Nampa, IDWesley Medical Center
Acute Care Hospitals · Wichita, KSSaint Alphonsus Medical Center - Ontario
Acute Care Hospitals · Ontario, ORSt Joseph Hospital
Acute Care Hospitals · Bellingham, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 83704 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.
BOISE, ID 83704
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 Heather Hammerstedt's NPI number?
The NPI number for Heather Hammerstedt is 1275621104. It was assigned to this individual provider in the NPPES registry on October 10, 2006.
Where is Heather Hammerstedt located?
Heather Hammerstedt practices at 6051 W Emerald St, Boise, ID 83704. The listed phone number is (208) 302-5150.
What is Heather Hammerstedt's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Heather Hammerstedt enrolled in Medicare?
Yes. Heather Hammerstedt 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 Heather Hammerstedt's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Heather Hammerstedt reassigns Medicare benefits to 9 organizations: Saint Alphonsus Regional Medical Center Inc (Boise, ID), Cep America, LLC (Boise, ID), Saint Alphonsus Medical Center- Ontario Inc (Ontario, OR), St Lukes Clinic - Mccall LLC (Mccall, ID), Saint Alphonsus Medical Center Baker City, Inc (Baker City, OR) and 4 more organizations, 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 Heather Hammerstedt's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Heather Hammerstedt accept?
Health plans from Blue Cross and Blue Shield of Kansas, Inc., Moda Health Plan, Inc. and Premera Blue Cross Blue Shield of Alaska list Heather Hammerstedt 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 Heather Hammerstedt affiliated with any hospitals?
According to CMS data, Heather Hammerstedt is affiliated with Saint Alphonsus Regional Medical Center, Saint Alphonsus Medical Center - Nampa, Wesley Medical Center, Saint Alphonsus Medical Center - Ontario and St Joseph Hospital.
When was this NPI record last updated?
The NPPES record for Heather Hammerstedt was last updated on March 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Dr. Heather Hammerstedt, M.D. · NPI 1275621104
Emergency Medicine physician in Boise, Idaho. Individual provider, active in the CMS NPPES registry since October 10, 2006.
## Identity
- **NPI:** 1275621104 (Entity type: Individual)
- **Enumerated:** October 10, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** M10228 (Idaho)
- **Sole proprietor:** No
## Practice location
- **Address:** 6051 W EMERALD ST, Boise, ID 83704-8969
- **Phone:** (208) 302-5150
## 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:** 9 organizations under Medicare reassignment (form CMS-855R): Saint Alphonsus Regional Medical Center Inc (NPI 1649357716, Boise, ID); Cep America, LLC (NPI 1811357023, Boise, ID); Saint Alphonsus Medical Center- Ontario Inc (NPI 1093034159, Ontario, OR); St Lukes Clinic - Mccall LLC (NPI 1881982510, Mccall, ID); Saint Alphonsus Medical Center Baker City, Inc (NPI 1881726206, Baker City, OR); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Temple University School Of Medicine, class of 2004
## Record status
- **NPPES last updated:** March 10, 2026
- **Other identifiers:** Medicaid 808036000 (ID)
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Source: [NPI Profile](https://npiprofile.com/npi/1275621104) · Data from the CMS NPPES public registry.