Irena Sigel, O.D.
Optometrist · Denver, CO
Irena Sigel, O.D. is an optometrist with a practice address in Denver, Colorado, and NPI 1366859829, issued on Jul 16, 2014. Check the license (Colorado OPT.0003074, as entered in NPPES) with the Colorado board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Irena Sigel
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License numbers
- OPT.0003074 CO
8407T TX
Self-reported in NPPES; status is on the state search - Practice location
- 3545 Quebec St, Denver, CO 80207
- Phone
- (303) 501-1122
- Enumerated
- Jul 16, 2014
- Record last updated
- Sep 22, 2014 (not updated in 12 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest optometrist records → All 1,273 in Colorado → Look up another NPI →
Verify Irena Sigel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Colorado board licenses this profession
Search for license OPT.0003074Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average optometrist in 2024
23 Medicare Part D claims, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 91% of claims.
Most prescribed
- Restasis12 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.
Industry payments in 2024: $728.07
10 payments; by number, the most common kind was food and beverage; the largest payer was Glaukos Corporation. The 34,453 providers of this specialty with any payment received $769.99 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Irena Sigel among 1,273 optometrist records in Colorado
Irena Sigel, O.D. is one of 1,273 optometrist records with a practice address in Colorado. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 69% of them.
- NPI issued2014 · 69% of these records are older, 28% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2014 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Optometrist providers in Colorado
There are 1,273 optometrist records in Colorado.
All 1,273 in Colorado → Every provider in Denver → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Thomas RyanDenver, CO 802071346417318
- Mark Williams, ODDenver, CO 802071922840149
- Annette Butler, O.D.Denver, CO 802061235323429
- Thomas Cruse, O.D.Denver, CO 802061588919443
- James Dowgin, ODDenver, CO 802061386271443
- Alexis Kyle, ODDenver, CO 802061689591539
- Kathryn Lachenman, O.D.Denver, CO 802061912287111
- David Moore, ODDenver, CO 802061083307243
Common questions
What is Irena Sigel, O.D.'s NPI number?
Irena Sigel, O.D.'s National Provider Identifier (NPI) is 1366859829, issued on Jul 16, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Irena Sigel, O.D. located?
The NPPES record lists a practice address at 3545 Quebec St, Denver, CO, 80207. Phone: (303) 501-1122. Providers update this record themselves, so call before visiting.
How can I verify Irena Sigel, O.D.'s license?
NPPES lists Colorado license number OPT.0003074, as entered by the provider. Search the Colorado board that licenses this profession; the NPPES record confirms identity only.
How much does Irena Sigel, O.D. prescribe under Medicare Part D?
In 2024, Irena Sigel, O.D. had 23 Medicare Part D claims; the average among optometrist prescribers was 277. 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.