DR. CHAO GUO MD
NPI 1043606486
Internal Medicine in Stamford, CT
About Dr. Chao Guo Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CHAO GUO MD (NPI 1043606486) is an individual internal medicine provider in Stamford, Connecticut, licensed in Massachusetts (286545) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS, is affiliated with King's Daughters' Medical Center, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Chao Guo Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
7Medicare enrollment records show Chao Guo reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
East Orange, NJ 07018
- Reassigned Medicare billing, New Jersey enrollment
- 125 clinicians in this Medicare group
Edison, NJ 08820
- Reassigned Medicare billing, New Jersey enrollment
- 351 clinicians in this Medicare group
Framingham, MA 01702
- Reassigned Medicare billing, Massachusetts enrollment
- 156 clinicians in this Medicare group
Potsdam, NY 13676
- Reassigned Medicare billing, New York enrollment
- 414 clinicians in this Medicare group
Ashland, KY 41101
- Reassigned Medicare billing, Kentucky enrollment
- Medicare enrollment name: Kings Daughters Medical Specialties Inc
- 531 clinicians in this Medicare group
Lawrenceburg, IN 47025
- Reassigned Medicare billing, Tennessee enrollment
- 394 clinicians in this Medicare group
Oak Ridge, TN 37830
- Reassigned Medicare billing, Kentucky and Tennessee enrollments
- 358 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
King's Daughters' Medical Center
Acute Care Hospitals · Ashland, KYCentrastate Medical Center
Acute Care Hospitals · Freehold, NJCanton-Potsdam Hospital
Acute Care Hospitals · Potsdam, NYSlhs Massena, Inc
Critical Access Hospitals · Massena, NYCumberland Medical Center
Acute Care Hospitals · Crossville, TNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06902 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
STAMFORD, CT 06902
STAMFORD, CT 06902
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Chao Guo's NPI number?
The NPI number for Chao Guo is 1043606486. It was assigned to this individual provider in the NPPES registry on April 13, 2015.
Where is Chao Guo located?
Chao Guo practices at 30 Shelburne Rd Dept Of Medicine, Stamford, CT 06902. The listed phone number is (203) 276-7147.
What is Chao Guo's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Chao Guo enrolled in Medicare?
Yes. Chao Guo is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Chao Guo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Chao Guo reassigns Medicare benefits to 7 organizations: Nj Acute Care Specialists Professional Corporation (East Orange, NJ), Hospitalist Physicians Of New Jersey PA (Edison, NJ), Hospitalist Physicians Of Massachusetts PC (Framingham, MA), Canton-Potsdam Hospital (Potsdam, NY), King's Daughters Medical Specialties, Inc. (Ashland, KY) and 2 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Chao Guo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Chao Guo accept?
Health plans from Anthem Blue Cross and Blue Shield, CareSource, Molina Healthcare and Taro Health list Chao Guo as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Chao Guo affiliated with any hospitals?
According to CMS data, Chao Guo is affiliated with King's Daughters' Medical Center, Centrastate Medical Center, Canton-Potsdam Hospital, Slhs Massena, Inc and Cumberland Medical Center.
When was this NPI record last updated?
The NPPES record for Chao Guo was last updated on November 10, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Chao Guo, MD · NPI 1043606486
Internal Medicine physician in Stamford, Connecticut. Individual provider, active in the CMS NPPES registry since April 13, 2015.
## Identity
- **NPI:** 1043606486 (Entity type: Individual)
- **Enumerated:** April 13, 2015
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 286545 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 30 SHELBURNE RD, DEPT OF MEDICINE, Stamford, CT 06902
- **Phone:** (203) 276-7147 · **Fax:** (203) 276-7368
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 7 organizations under Medicare reassignment (form CMS-855R): Nj Acute Care Specialists Professional Corporation (NPI 1073805917, East Orange, NJ); Hospitalist Physicians Of New Jersey PA (NPI 1588021851, Edison, NJ); Hospitalist Physicians Of Massachusetts PC (NPI 1376145680, Framingham, MA); Canton-Potsdam Hospital (NPI 1568548782, Potsdam, NY); King's Daughters Medical Specialties, Inc. (NPI 1033871447, Ashland, KY); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** November 10, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1043606486) · Data from the CMS NPPES public registry.