Sujata A. Oak, MD
Internal Medicine Physician · Dekalb, IL
Sujata A. Oak, MD is an internal medicine physician with a practice address in Dekalb, Illinois, and NPI 1275503849, issued on Jan 25, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Sujata A. Oak
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- Health Services, Dekalb, IL 60115
- Phone
- (815) 753-1311
- Enumerated
- Jan 25, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (815) 753-9599
- Entity
- Type 1 · individual
Also registered at Health Services
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Bowman, MDGeneral Practice Physician1528048410
- Michael Brown, MDFamily Medicine Physician1871568931
- Shobha Mahadevan, M.D.Internal Medicine Physician1821082231
Verify Sujata A. Oak 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: $12,991.23
10 payments; by number, the most common kind was consulting fee; the largest payer was Takeda Pharmaceuticals U.S.A., 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.
Internal Medicine Physician providers in Illinois
There are 7,238 internal medicine physician records in Illinois.
Other internal medicine physician records in Illinois
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- Maliha Abbas, D.O.Chicago, IL1174963920
- Zareena Abbas, MDChicago, IL1427078872
- Abu Abbasi, MDChicago, IL1083243877
- Ayesha Abbasi, MDChicago, IL1376216705
- Khalda Abbasi, MDNaperville, IL1487705240
- Elmer Abbo, MDBurr Ridge, IL1710048541
- Paul Abbo, M.D.River Forest, IL1083693378
Common questions
What is Sujata A. Oak, MD's NPI number?
Sujata A. Oak, MD's National Provider Identifier (NPI) is 1275503849, issued on Jan 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sujata A. Oak, MD located?
The NPPES record lists a practice address at Health Services, Dekalb, IL, 60115. Phone: (815) 753-1311. Providers update this record themselves, so call before visiting.
How can I verify Sujata A. Oak, MD'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.