Stefen M. Ammon, MD
Emergency Medicine Physician · Littleton, CO
Stefen M. Ammon, MD is an emergency medicine physician with a practice address in Littleton, Colorado, and NPI 1730210733, issued on Mar 8, 2007. Check the license (Colorado 45573, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Stefen M. Ammon
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 45573 CO
CDRH.0045573 CO
MC-0362 ID
58357 AZ
18674 NV
Self-reported in NPPES; status is on the state search - Practice location
- 7700 S Broadway, Littleton, CO 80122
- Phone
- (303) 778-5666
- Enumerated
- Mar 8, 2007
- Record last updated
- May 15, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (303) 778-5787
- Medicaid ID
- 45607753 CO
- Medicare enrollment
- Enrolled (PECOS I20070829000953); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,434 in Colorado → Look up another NPI →
Also registered at 7700 S Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Gleandy Adlaon Gott, NPNurse Practitioner1053538397
- Irfan Ali, D.O.Hospitalist Physician1649852419
- Jill Anderson, NNPCritical Care Neonatal Nurse Practitioner1720294622
- Tyler Anderson, PA-CPhysician Assistant1700470101
- Barbara Antuna, MDEmergency Medicine Physician1477527117
Verify Stefen M. Ammon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 45573Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average emergency medicine physician in 2024
40 Medicare Part D claims for 26 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 44.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Usacs Community Emergency Services OF Colorado Inc.Denver, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stefen M. Ammon among 1,434 emergency medicine physician records in Colorado
Stefen M. Ammon, MD is one of 1,434 emergency medicine physician records with a practice address in Colorado. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 43% of them.
- NPI issued2007 · 43% of these records are older, 47% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2003 · median 2011 among the 810 with a school on file
- Record last updated2020 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
53 emergency medicine physician records list a practice address in Littleton
They are 53 of the 3,918 NPPES records with a practice address in Littleton, and 1,434 emergency medicine physician records in Colorado.
All 1,434 in Colorado → Every provider in Littleton → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Barbara Antuna, MDLittleton, CO 801221477527117
- Diane Barta, MDLittleton, CO 801221366416000
- Devin Bateman, MDLittleton, CO 801221528032265
- James Bodenhamer, MDLittleton, CO 801221861467490
- Sally Coates, MDLittleton, CO 801221497729131
- Thomas Drake, MDLittleton, CO 801221295709947
- Eugene Eby, MDLittleton, CO 801221386618031
- Stanley Galle, MDLittleton, CO 801221659346278
Common questions
What is Stefen M. Ammon, MD's NPI number?
Stefen M. Ammon, MD's National Provider Identifier (NPI) is 1730210733, issued on Mar 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Stefen M. Ammon, MD located?
The NPPES record lists a practice address at 7700 S Broadway, Littleton, CO, 80122. Phone: (303) 778-5666. Providers update this record themselves, so call before visiting.
How can I verify Stefen M. Ammon, MD's license?
NPPES lists Colorado license number 45573, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Stefen M. Ammon, MD prescribe under Medicare Part D?
In 2024, Stefen M. Ammon, MD had 40 Medicare Part D claims for 26 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Stefen M. Ammon, MD's MIPS final score?
The 2023 MIPS final score is 44.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.