Vivian I. Chao, MD
Internal Medicine Physician · Wheat Ridge, CO
Vivian I. Chao, MD is an internal medicine physician with a practice address in Wheat Ridge, Colorado, and NPI 1093845935, issued on Mar 7, 2007. Check the license (Colorado 43821, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Vivian I. Chao
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 43821 CO
Self-reported in NPPES; status is on the state search - Practice location
- 4803 Ward RD, Wheat Ridge, CO 80033
- Phone
- (303) 338-4545
- Enumerated
- Mar 7, 2007
- Record last updated
- Apr 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 93704241 CO
- Medicare enrollment
- Enrolled (PECOS I20051008000139); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 2000
- Entity
- Type 1 · individual
Also registered at 4803 Ward RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rebecca Abraham, MS, RDRegistered Dietitian1124458179
- Sharon AdamskiNurse's Aide1083758866
- Hope Aguilera, LCSWClinical Social Worker1790148013
- Linda Arens, LPNLicensed Practical Nurse1164630307
- Valerie Bain, MDFamily Medicine Physician1659690311
- Robert Barton, PAPhysician Assistant1982731931
Verify Vivian I. Chao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 43821Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average internal medicine physician in 2024
8,826 Medicare Part D claims for 701 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 346 claims were for opioids.
Most prescribed
- Atorvastatin Calcium724 claims
- Levothyroxine Sodium598 claims
- Rosuvastatin Calcium493 claims
- Lisinopril466 claims
- Alendronate Sodium381 claims
- Simvastatin356 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
- Colorado Permanente Medical Group PCWheat Ridge, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
35 internal medicine physician records list a practice address in Wheat Ridge
They are 35 of the 2,472 NPPES records with a practice address in Wheat Ridge, and 2,046 internal medicine physician records in Colorado.
All 35 in Wheat Ridge → All 2,046 in Colorado → Every provider in Wheat Ridge →
Other internal medicine physician records in Colorado
- Emily Aaron, MDDenver, CO1205256971
- David Abbey, MS MDFort Collins, CO1568483196
- Tyler Abbey, DOGreeley, CO1730572694
- Sahar Abdelqader, MDLongmont, CO1366600710
- Ahmed Abdulrahman, MDPueblo, CO1093425068
- Durant Abernethy, M.D.Frisco, CO1427289040
- Alan Aboaf, MDCentennial, CO1003866393
- Adam Abraham, MDAurora, CO1720178304
- Phebe Abraham, MDGreeley, CO1558980540
- Richard Abrams, M.D.Denver, CO1174645386
Common questions
What is Vivian I. Chao, MD's NPI number?
Vivian I. Chao, MD's National Provider Identifier (NPI) is 1093845935, issued on Mar 7, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Vivian I. Chao, MD located?
The NPPES record lists a practice address at 4803 Ward RD, Wheat Ridge, CO, 80033. Phone: (303) 338-4545. Providers update this record themselves, so call before visiting.
How can I verify Vivian I. Chao, MD's license?
NPPES lists Colorado license number 43821, 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 Vivian I. Chao, MD prescribe under Medicare Part D?
In 2024, Vivian I. Chao, MD had 8,826 Medicare Part D claims for 701 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.