Stefen M. Ammon, MD
Emergency Medicine · Littleton, CO
At a glance
7700 S Broadway, Littleton, CO 80122-2602
NPPES record updated May 15, 2020. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
7700 S Broadway Littleton Adventist Hospital, Emergency Dept.Littleton, CO 80122-2602
Additional reported practice locations
3455 Ringsby Ct Ste 102Denver, CO 802164923
Phone: 3035001518 · Ext. 30350
Fax: 7205980440 1705 W University Dr Ste 104
Tempe, AZ 852813269
Phone: 4804933444
Fax: 4808674464 3841 W Charleston Blvd Ste 203
Las Vegas, NV 891021858
Phone: 7028484443 · Ext. 70284
Fax: 7028050299
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 2003
- CMS specialties
- Emergency Medicine
Practice groups
Reported hospital affiliations
- Adventhealth Castle Rock Castle Rock, CO
- Adventhealth Littleton Littleton, CO
- Adventhealth Parker Parker, CO
- Adventhealth Porter Denver, CO
- Denver Health & Hospital Authority Denver, CO
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Emergency Medicine
- Taxonomy code
- 207P00000X
- Enumeration date
- Mar 8, 2007
- Record updated
- May 15, 2020
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- MD
Reported taxonomies and licenses
207P00000X
License reported: CDRH.0045573 CO
207P00000X
License reported: 58357 AZ
207P00000X
License reported: 18674 NV
207P00000X · Primary
License reported: MC-0362 ID
207P00000X
License reported: 45573 CO
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
7700 S BroadwayLittleton Adventist Hospital, Emergency Dept.
Littleton, CO 80122-2602
- Phone
- (303) 778-5666
- Fax
- (303) 778-5787
Mailing address
1241 W MINERAL AVESUITE 100
LITTLETON, CO 801205685
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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