Amber Sieja, MD
Internal Medicine Physician · Aurora, CO
Amber Sieja, MD is an internal medicine physician with a practice address in Aurora, Colorado, and NPI 1548271307, issued on Aug 10, 2006. Check the license (Colorado 41124, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Amber Sieja
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 41124 CO
Self-reported in NPPES; status is on the state search - Practice location
- 12605 E 16TH Ave, Aurora, CO 80045
- Phone
- (720) 848-0000
- Enumerated
- Aug 10, 2006
- Record last updated
- Nov 29, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicaid ID
- 44975724 CO
- Medicare enrollment
- Enrolled (PECOS I20070926001180); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Also registered at 12605 E 16TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Amber Sieja in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 41124Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average internal medicine physician in 2024
489 Medicare Part D claims for 43 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium41 claims
- Levothyroxine Sodium34 claims
- Trazodone Hcl25 claims
- Amlodipine Besylate22 claims
- Omeprazole17 claims
- Escitalopram Oxalate16 claims
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.
Bills Medicare through one group practice
- University Physicians IncorporatedAurora, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Amber Sieja among 2,046 internal medicine physician records in Colorado
Amber Sieja, MD is one of 2,046 internal medicine physician records with a practice address in Colorado. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 60% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2000 · median 2006 among the 1,090 with a school on file
- Record last updated2012 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
244 internal medicine physician records list a practice address in Aurora
They are 244 of the 17,400 NPPES records with a practice address in Aurora, and 2,046 internal medicine physician records in Colorado.
All 2,046 in Colorado → Every provider in Aurora → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Melver Anderson, M.D.Aurora, CO 800451992771109
- Mary Ayers, M.D.Aurora, CO 800451184632432
- Ronald Colson, MDAurora, CO 800451144214099
- Anjali Dhurandhar, M.D.Aurora, CO 800451023035045
- Liselotte Dyrbye, M.D.Aurora, CO 800451275511164
- Eden English, MDAurora, CO 800451811969058
- Mark Levine, M.D.Aurora, CO 800451477556694
- Carmen Lewis, M.D.Aurora, CO 800451841215134
Common questions
What is Amber Sieja, MD's NPI number?
Amber Sieja, MD's National Provider Identifier (NPI) is 1548271307, issued on Aug 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Amber Sieja, MD located?
The NPPES record lists a practice address at 12605 E 16TH Ave, Aurora, CO, 80045. Phone: (720) 848-0000. Providers update this record themselves, so call before visiting.
How can I verify Amber Sieja, MD's license?
NPPES lists Colorado license number 41124, 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 Amber Sieja, MD prescribe under Medicare Part D?
In 2024, Amber Sieja, MD had 489 Medicare Part D claims for 43 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.