Irene W. Macharia, M.D.
Internal Medicine Physician · Denver, CO
Irene W. Macharia, M.D. is an internal medicine physician with a practice address in Denver, Colorado, and NPI 1881868859, issued on Apr 21, 2008. Check the license (Colorado 49712, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Irene W. Macharia
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 49712 CO
MD00049035 WA
Self-reported in NPPES; status is on the state search - Practice location
- 10350 E Dakota Ave, Denver, CO 80247
- Phone
- (303) 338-4545
- Enumerated
- Apr 21, 2008
- Record last updated
- Jul 14, 2026
- Medicaid ID
- 39801829 CO
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Also registered at 10350 E Dakota Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Irene W. Macharia in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 49712Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average internal medicine physician in 2024
895 Medicare Part D claims for 250 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 44 claims were for opioids.
Most prescribed
- Metoprolol Tartrate47 claims
- Losartan Potassium45 claims
- Atorvastatin Calcium36 claims
- Furosemide36 claims
- Pradaxa35 claims
- Lisinopril31 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.
Irene W. Macharia among 2,046 internal medicine physician records in Colorado
Irene W. Macharia, M.D. 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 2008, is newer than 61% of them.
- NPI issued2008 · 61% of these records are older, 35% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2026 · 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).
493 internal medicine physician records list a practice address in Denver
They are 493 of the 25,068 NPPES records with a practice address in Denver, and 2,046 internal medicine physician records in Colorado.
All 2,046 in Colorado → Every provider in Denver → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Brandy Allen, MDDenver, CO 802471609865468
- Daniel Barry, MDDenver, CO 802471841380425
- Elena Chebanova, MDDenver, CO 802471891724027
- David Downs, M.D.Denver, CO 802471275537698
- Dora Hilty, MDDenver, CO 802471194797431
- Barry Kalfon, MDDenver, CO 802471982624359
- Sukhjinder Khera, M.D.Denver, CO 802471124062427
- Ermin Kreso, MDDenver, CO 802471679584916
Common questions
What is Irene W. Macharia, M.D.'s NPI number?
Irene W. Macharia, M.D.'s National Provider Identifier (NPI) is 1881868859, issued on Apr 21, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Irene W. Macharia, M.D. located?
The NPPES record lists a practice address at 10350 E Dakota Ave, Denver, CO, 80247. Phone: (303) 338-4545. Providers update this record themselves, so call before visiting.
How can I verify Irene W. Macharia, M.D.'s license?
NPPES lists Colorado license number 49712, 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 Irene W. Macharia, M.D. prescribe under Medicare Part D?
In 2024, Irene W. Macharia, M.D. had 895 Medicare Part D claims for 250 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.