Tess Allan Mischler
Internal Medicine Physician · Chicago, IL
Tess Allan Mischler is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1861075244, issued on May 3, 2021. Check the license (Illinois 125.078045, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Tess Allan Mischler
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 125.078045 IL
Self-reported in NPPES; status is on the state search - Practice location
- 5841 S Maryland Ave Ste MC7082, Chicago, IL 60637
- Phone
- (773) 702-6840
- Enumerated
- May 3, 2021
- Record last updated
- Jan 2, 2026
- Fax
- (773) 834-3950
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 5841 S Maryland Ave Ste MC7082
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Amritpal Bahga, MDInternal Medicine Physician1255060737
Verify Tess Allan Mischler 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 125.078045Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average internal medicine physician in 2024
431 Medicare Part D claims for 66 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Amlodipine Besylate32 claims
- Atorvastatin Calcium19 claims
- Fluticasone Propionate17 claims
- Hydrochlorothiazide17 claims
- Lisinopril15 claims
- Rosuvastatin Calcium15 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.
Tess Allan Mischler among 7,238 internal medicine physician records in Illinois
Tess Allan Mischler 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 2021, is newer than 74% of them.
- NPI issued2021 · 74% of these records are older, 22% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2026 · 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).
2,867 internal medicine physician records list a practice address in Chicago
They are 2,867 of the 63,379 NPPES records with a practice address in Chicago, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Chicago → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jennifer AngelesChicago, IL 606371114945276
- Sameer Badlani, MDChicago, IL 606371699795302
- Kristine Bordenave, M.D.Chicago, IL 606371811009368
- Andrew DavisChicago, IL 606371275642167
- Hatim HassanChicago, IL 606371417970385
- Keiki Hinami, M.D.Chicago, IL 606371437136785
- David Liebovitz, MDChicago, IL 606371972564748
- Thomas Mason, M.D.Chicago, IL 606371730114505
Common questions
What is Tess Allan Mischler's NPI number?
Tess Allan Mischler's National Provider Identifier (NPI) is 1861075244, issued on May 3, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Tess Allan Mischler located?
The NPPES record lists a practice address at 5841 S Maryland Ave Ste MC7082, Chicago, IL, 60637. Phone: (773) 702-6840. Providers update this record themselves, so call before visiting.
How can I verify Tess Allan Mischler's license?
NPPES lists Illinois license number 125.078045, 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 Tess Allan Mischler prescribe under Medicare Part D?
In 2024, Tess Allan Mischler had 431 Medicare Part D claims for 66 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.