Robert S Chang, MD - Medicare Emergency Medicine in Greenwich, CT

  1. Home
  2. Emergency Medicine
  3. CT
  4. Greenwich
Robert S Chang, MD is a medicare enrolled "Emergency Medicine" physician in Greenwich, Connecticut. He went to State University Of New York At Stony Brook, School Of Medicine and graduated in 1994 and has 30 years of diverse experience with area of expertise as Emergency Medicine. He is a member of the group practice Union Emergency Medical Associates Llc, Greenwich Hospital and his current practice location is 5 Perryridge Rd, Greenwich Hospital, Greenwich, Connecticut. You can reach out to his office (for appointments etc.) via phone at (203) 863-3637.

Robert S Chang is licensed to practice in New Jersey (license number 25MA08016400) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1760581672.

Contact Information

Robert S Chang, MD
5 Perryridge Rd, Greenwich Hospital,
Greenwich, CT 06830-4608
(203) 863-3637
Not Available

Map and Direction




Physician's Profile

Full NameRobert S Chang
GenderMale
SpecialityEmergency Medicine
Experience30 Years
Location5 Perryridge Rd, Greenwich, Connecticut
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Robert S Chang attended and graduated from State University Of New York At Stony Brook, School Of Medicine in 1994
  NPI Data:
  • NPI Number: 1760581672
  • Provider Enumeration Date: 09/21/2006
  • Last Update Date: 09/23/2014
  Medicare PECOS Information:
  • PECOS PAC ID: 6608874938
  • Enrollment ID: I20061121000565

Medical Identifiers

Medical identifiers for Robert S Chang such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1760581672NPI-NPPES
D08887200OtherNJCDS NUMBER

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine 25MA08016400 (New Jersey)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Greenwich Hospital Association -Greenwich, CTHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Union Emergency Medical Associates Llc054733442717
Greenwich Hospital367847671069

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Robert S Chang allows following entities to bill medicare on his behalf.
Entity NameMiddlesex Emergency Physicians, P.a.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1811921760
PECOS PAC ID: 9931002854
Enrollment ID: O20040129000034
Entity NamePegasus Emergency Group Pa
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1336179621
PECOS PAC ID: 5890789176
Enrollment ID: O20040409000575
Entity NamePlainfield Emergency Physicians, Pa
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1659309680
PECOS PAC ID: 7719972728
Enrollment ID: O20040419001065
Entity NameEmergency Physician Associates Of North Jersey P C
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1497783419
PECOS PAC ID: 7911992326
Enrollment ID: O20040825001558
Entity NameUnion Emergency Medical Associates Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1689847352
PECOS PAC ID: 0547334427
Enrollment ID: O20080812000013
Entity NameRobert Wood Johnson Physician Enterprise
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1245587922
PECOS PAC ID: 5597917633
Enrollment ID: O20121218000345
Entity NameHunterdon Urgent Care Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1154791796
PECOS PAC ID: 9638460876
Enrollment ID: O20160620001504

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Robert S Chang is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Robert S Chang, MD
14 Cinnamon Ct,
Holmdel, NJ 07733-1477

Ph: (732) 335-3979		Robert S Chang, MD
5 Perryridge Rd, Greenwich Hospital,
Greenwich, CT 06830-4608

Ph: (203) 863-3637

Reviews and Comments


Emergency Medicine Doctors in Greenwich, CT

Shideh Imanian-parsa, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 5 Perryridge Rd, Emergency Department, Greenwich, CT 06830
Phone: 203-863-3637    Fax: 203-863-3821
Stacey M Donegan, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 5 Perryridge Rd, Emergency Department, Greenwich, CT 06830
Phone: 203-863-3637    Fax: 203-863-3821
Christopher M Davison, M.D.
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 5 Perryridge Rd, Emergency Department, Greenwich, CT 06830
Phone: 203-863-3637    Fax: 203-863-3821
Dr. Jeremiah H Tyson, M.D
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 5 Perryridge Rd, Greenwich, CT 06830
Phone: 203-863-3000    
J. Allen Britvan, M.D
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 5 Perryridge Rd, Emergency Department, Greenwich, CT 06830
Phone: 203-863-3637    Fax: 203-863-3281
Michael S Canter, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 5 Perryridge Rd, Emergency Department, Greenwich, CT 06830
Phone: 203-863-3632    Fax: 203-863-3821
Dr. Cerrah Lynn Mendelsohn-elzam, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 7 Riversville Rd Ste 1, Greenwich, CT 06831
Phone: 203-531-1808    Fax: 203-531-8326

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.