Chao Guo, MD
Internal Medicine Physician · Stamford, CT
Chao Guo, MD is an internal medicine physician with a practice address in Stamford, Connecticut, and NPI 1043606486, issued on Apr 13, 2015. Check the license on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Chao Guo
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 286545 MA
ME135339 FL
036158670 IL
25MA10656300 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 30 Shelburne RD, Stamford, CT 06902
- Phone
- (203) 276-7147
- Enumerated
- Apr 13, 2015
- Record last updated
- Nov 10, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (203) 276-7368
- Medicare enrollment
- Enrolled (PECOS I20231031001392); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 30 Shelburne RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Chao Guo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining BoardCheck 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
18 Medicare Part D claims, 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.
Industry payments in 2024: $83.34
1 payment: food and beverage; the largest payer was Inari Medical, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
3 hospitals and group practices
- Canton-Potsdam HospitalPotsdam, NY · Acute Care Hospitals2 of 5 stars
- Kings Daughters Medical Specialties IncAshland, KY
- NJ Acute Care Specialists Professional CorporationFreehold, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Chao Guo among 2,623 internal medicine physician records in Connecticut
Chao Guo, MD is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 74% of them.
- NPI issued2015 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2015 · median 2004 among the 1,646 with a school on file
- Record last updated2021 · 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 Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
131 internal medicine physician records list a practice address in Stamford
They are 131 of the 2,774 NPPES records with a practice address in Stamford, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Stamford → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Burton Benjamin, M.D.Stamford, CT 069021891756474
- Celeste Cox-Baldwin, MDStamford, CT 069021922009588
- Kristin EdwardsStamford, CT 069021346203213
- John Fitzgibbons, M.D.Stamford, CT 069021255378949
- Laurie Gordon, MDStamford, CT 069021174635759
- Scott Gottlieb, MDStamford, CT 069021992713036
- Radhika Jasthi, MDStamford, CT 069021457369944
- Maher Madhoun, MDStamford, CT 069021790731768
Common questions
What is Chao Guo, MD's NPI number?
Chao Guo, MD's National Provider Identifier (NPI) is 1043606486, issued on Apr 13, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Chao Guo, MD located?
The NPPES record lists a practice address at 30 Shelburne RD, Stamford, CT, 06902. Phone: (203) 276-7147. Providers update this record themselves, so call before visiting.
How can I verify Chao Guo, MD's license?
Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Chao Guo, MD prescribe under Medicare Part D?
In 2024, Chao Guo, MD had 18 Medicare Part D claims; 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.