Anita Tang Ong, M.D.
Internal Medicine Physician · Oak Park, IL
Anita Tang Ong, M.D. is an internal medicine physician with a practice address in Oak Park, Illinois, and NPI 1699828715, issued on Jan 19, 2007. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Anita Tang Ong
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 405 Harrison St, Oak Park, IL 60304
- Phone
- (708) 848-9390
- Enumerated
- Jan 19, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Verify Anita Tang Ong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $124.01
1 payment: food and beverage; the largest payer was Otsuka America Pharmaceutical, 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.
Anita Tang Ong among 7,238 internal medicine physician records in Illinois
Anita Tang Ong, M.D. 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 2007, is newer than 39% of them.
- NPI issued2007 · 39% of these records are older, 55% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2007 · 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).
62 internal medicine physician records list a practice address in Oak Park
They are 62 of the 2,307 NPPES records with a practice address in Oak Park, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Oak Park → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sheba Chiplunkar, M.D.Oak Park, IL 603041356374656
- Bernard Coniglio, M.D.Oak Park, IL 603041124085568
- Marie Feldman, MDOak Park, IL 603041841386729
- Janet Forbes, M.D.Oak Park, IL 603041295838779
- Catalina Grija, M.D.Oak Park, IL 603041770793143
- Rita Gupta, M.D.Oak Park, IL 603041922117985
- Mohammad Khan, M.D.Oak Park, IL 603041487653838
- Catherine Koop, M.D.Oak Park, IL 603041851358972
Common questions
What is Anita Tang Ong, M.D.'s NPI number?
Anita Tang Ong, M.D.'s National Provider Identifier (NPI) is 1699828715, issued on Jan 19, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Anita Tang Ong, M.D. located?
The NPPES record lists a practice address at 405 Harrison St, Oak Park, IL, 60304. Phone: (708) 848-9390. Providers update this record themselves, so call before visiting.
How can I verify Anita Tang Ong, M.D.'s license?
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.
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.