Stefen Ammon, MD
NPI 1730210733 · Emergency Medicine Physician · Littleton, CO
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stefen Ammon, MD is a Emergency Medicine Physician provider in Littleton, CO (NPI 1730210733).
Provider details
- NPI number
- 1730210733
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- CDRH.0045573 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
751 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Residence Visit for New Patient With Low Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99342 | 85 | $77 |
| Red Blood Cell Concentration Measurement85014 | 82 | $2 |
| Blood Test, Basic Group of Blood Chemicals (calcium, Ionized)80047 | 80 | $13 |
| Residence Visit for Established Patient With Low Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99348 | 71 | $76 |
| Urinalysis, Manual Test81002 | 61 | $3 |
| Detection Test By Immunoassay With Direct Visual Observation for Influenza Virus87804 | 56 | $16 |
Practice location
Mailing address
Additional practice locations (3)
- 1705 W University Dr Ste 104Tempe, AZ 85281-3269Phone: (480) 493-3444Fax: (480) 867-4464
- 3455 Ringsby Ct Ste 102Denver, CO 80216-4923Phone: (303) 500-1518Fax: (720) 598-0440
- 3841 W Charleston Blvd Ste 203Las Vegas, NV 89102-1858Phone: (702) 848-4443Fax: (702) 805-0299
Registry dates
- Enumerated
- 2007-03-08
- Last updated
- 2020-05-15
- Certified
- 2020-05-15
Frequently asked questions
- What is Stefen Ammon's NPI number?
- Stefen Ammon's National Provider Identifier (NPI) is 1730210733, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stefen Ammon's specialty?
- Stefen Ammon is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Stefen Ammon located?
- Stefen Ammon's practice location on file with NPPES is 7700 S Broadway, Littleton, CO 80122-2602.
- What is Stefen Ammon's phone number?
- The practice phone number listed in the NPPES registry for Stefen Ammon is (303) 778-5666.
- Does Stefen Ammon accept Medicare?
- Stefen Ammon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stefen Ammon's NPI active?
- Yes — Stefen Ammon's NPI (1730210733) is active in the NPPES registry as of the last update on 2020-05-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.