Opkar S Chawla, MD - Medicare Internal Medicine in Centereach, NY

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Opkar S Chawla, MD is a medicare enrolled "Internal Medicine" physician in Centereach, New York. He graduated from medical school in 1983 and has 41 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Excel Urgent Care Of Nesconset Pllc, Stony Brook Internists University Faculty Practice Corporation and his current practice location is 23 Howell Avenue, Stony Brook Extended Care, Centereach, New York. You can reach out to his office (for appointments etc.) via phone at (631) 542-0550.

Opkar S Chawla is licensed to practice in New York (license number 183894) 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 1871548776.

Contact Information

Opkar S Chawla, MD
23 Howell Avenue, Stony Brook Extended Care,
Centereach, NY 11720-2133
(631) 542-0550
(631) 542-7473

Map and Direction




Physician's Profile

Full NameOpkar S Chawla
GenderMale
SpecialityInternal Medicine
Experience41 Years
Location23 Howell Avenue, Centereach, New York
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:
  • Opkar S Chawla graduated from medical school in 1983
  NPI Data:
  • NPI Number: 1871548776
  • Provider Enumeration Date: 05/23/2006
  • Last Update Date: 08/10/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 0547440471
  • Enrollment ID: I20110210000403

Medical Identifiers

Medical identifiers for Opkar S Chawla such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1871548776NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 183894 (New York)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Catholic Home CareFarmingdale, NYHome health agency
Suny/stony Brook University HospitalStony brook, NYHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Excel Urgent Care Of Nesconset Pllc509298598614
Stony Brook Internists University Faculty Practice Corporation9133019821362

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. Opkar S Chawla allows following entities to bill medicare on his behalf.
Entity NameStony Brook Internists University Faculty Practice Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1821035601
PECOS PAC ID: 9133019821
Enrollment ID: O20040416000248
Entity NameExcel Urgent Care Of Nesconset Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1851679252
PECOS PAC ID: 5092985986
Enrollment ID: O20110901000410
Entity NameExcel Urgent Care Of East Northport Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1881978021
PECOS PAC ID: 5294909826
Enrollment ID: O20111117000180
Entity NameExcel Urgent Care Of Nhp Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1952652281
PECOS PAC ID: 1658517883
Enrollment ID: O20130413000109
Entity NameExcel Urgent Care Of Wantagh Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1184067936
PECOS PAC ID: 9234364027
Enrollment ID: O20131104000254
Entity NameUrgent Care Of New York Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1962181925
PECOS PAC ID: 2466816525
Enrollment ID: O20230908000795

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. Opkar S Chawla 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
Opkar S Chawla, MD
500 Commack Rd Unit 206,
Commack, NY 11725-5022

Ph: (631) 675-2125		Opkar S Chawla, MD
23 Howell Avenue, Stony Brook Extended Care,
Centereach, NY 11720-2133

Ph: (631) 542-0550

Reviews and Comments


Internal Medicine Doctors in Centereach, NY

Jasjit S Kochar, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 23 South Howell Avenue, Stony Brook Extended Care, Centereach, NY 11720
Phone: 631-542-0550    Fax: 631-650-7473
Dr. Dominick Basile, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 7 Rosemary Ln, Centereach, NY 11720
Phone: 631-736-3015    Fax: 631-736-9277
Dr. Alan Lucks, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 7 Mark Tree Rd, Centereach, NY 11720
Phone: 631-471-2777    

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.