Mark Vajaranant
Obstetrics & Gynecology Physician · Chicago, IL
Mark Vajaranant is an obstetrics & gynecology physician with a practice address in Chicago, Illinois, and NPI 1962585059, issued on Oct 23, 2006. Check the license (Illinois 036-078309, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Mark Vajaranant
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 036-078309 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1740 W Taylor St, Chicago, IL 60612
- Phone
- (866) 600-2273
- Enumerated
- Oct 23, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20101014000808); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Columbia School Of Medicine, 1987
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 2,062 in Illinois → Look up another NPI →
Also registered at 1740 W Taylor St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark Vajaranant in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036-078309Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
42 Medicare Part D claims for 12 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Valacyclovir19 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 87.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- The Board OF Trustees OF The University OF IllinoisChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Vajaranant among 2,062 obstetrics & gynecology physician records in Illinois
Mark Vajaranant is one of 2,062 obstetrics & gynecology physician records with a practice address in Illinois. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1987 · median 2006 among the 1,168 with a school on file
- Record last updated2007 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
700 obstetrics & gynecology physician records list a practice address in Chicago
They are 700 of the 63,379 NPPES records with a practice address in Chicago, and 2,062 obstetrics & gynecology physician records in Illinois.
All 2,062 in Illinois → Every provider in Chicago → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Eric Brown, M.D.Chicago, IL 606121356303663
- Allison Cowett, M.D.Chicago, IL 606121639282668
- Sadia Haider, MDChicago, IL 606121033163522
- Kimberly Jezek-TischChicago, IL 606121720090269
- Robin Jones, M.D.Chicago, IL 606121942262258
- Martha KaempfeChicago, IL 606121821000142
- Andrea KempChicago, IL 606121932112927
- Edward Linn, M.D.Chicago, IL 606121730178765
Common questions
What is Mark Vajaranant's NPI number?
Mark Vajaranant's National Provider Identifier (NPI) is 1962585059, issued on Oct 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Vajaranant located?
The NPPES record lists a practice address at 1740 W Taylor St, Chicago, IL, 60612. Phone: (866) 600-2273. Providers update this record themselves, so call before visiting.
How can I verify Mark Vajaranant's license?
NPPES lists Illinois license number 036-078309, as entered by the provider. 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.
How much does Mark Vajaranant prescribe under Medicare Part D?
In 2024, Mark Vajaranant had 42 Medicare Part D claims for 12 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Mark Vajaranant's MIPS final score?
The 2023 MIPS final score is 87.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.