Christopher Yao
Internal Medicine Physician · Chicago, IL
Christopher Yao is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1013611730, issued on Mar 28, 2023. Check the license (Illinois 125.081726, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Christopher Yao
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 125.081726 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3134 N Clark St, Chicago, IL 60657
- Phone
- (312) 766-4949
- Enumerated
- Mar 28, 2023
- Record last updated
- Jun 21, 2023
- Fax
- (312) 766-4925
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 3134 N Clark St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lauren Abplanalp, D.O.Pulmonary Disease Physician1346604642
- Ahmed Abuhasna, DOInternal Medicine Physician1841985025
- Sara AbuzahraObstetrics & Gynecology Physician1952105066
- Fabiola Adkisson, MDInternal Medicine Physician1184474843
- Muhammad Ahmad, M.D.Internal Medicine Physician1407422629
- Reda Ahmed, MDInternal Medicine Physician1790618064
Verify Christopher Yao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 125.081726Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
32 Medicare Part D claims for 17 beneficiaries, against an average of 3,176 among the 108,855 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.
Christopher Yao among 7,238 internal medicine physician records in Illinois
Christopher Yao is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 82% of them.
- NPI issued2023 · 82% of these records are older, 13% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2023 · 47% 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 Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2,867 internal medicine physician records list a practice address in Chicago
They are 2,867 of the 63,379 NPPES records with a practice address in Chicago, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Chicago → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Bruce Blacker, M.D.Chicago, IL 606571982603924
- Brian Boholst, M.D.Chicago, IL 606571235181959
- Edgar Borda, MDChicago, IL 606571891782447
- Harold EulienChicago, IL 606571700877222
- Lisa Greising, M.D.Chicago, IL 606571578523155
- Michael Grendon, M.D.Chicago, IL 606571922007962
- Catherine Kallal, MDChicago, IL 606571407801665
- Alam Khan, M.D.Chicago, IL 606571316946288
Common questions
What is Christopher Yao's NPI number?
Christopher Yao's National Provider Identifier (NPI) is 1013611730, issued on Mar 28, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Christopher Yao located?
The NPPES record lists a practice address at 3134 N Clark St, Chicago, IL, 60657. Phone: (312) 766-4949. Providers update this record themselves, so call before visiting.
How can I verify Christopher Yao's license?
NPPES lists Illinois license number 125.081726, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Christopher Yao prescribe under Medicare Part D?
In 2024, Christopher Yao had 32 Medicare Part D claims for 17 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.