John Tharnstrom, PA
Emergency Medicine Physician · Naperville, IL
John Tharnstrom, PA is an emergency medicine physician with a practice address in Naperville, Illinois, and NPI 1467541227, issued on Oct 12, 2006. Check the license (Illinois 085-002044, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John Tharnstrom
- Credential
- PA
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 085-002044 IL
PA09915 TX
Self-reported in NPPES; status is on the state search - Practice location
- 808 Rickert Dr Ste 103, Naperville, IL 60540
- Phone
- (331) 551-5854
- Enumerated
- Oct 12, 2006
- Record last updated
- Jul 28, 2023
- Fax
- (630) 348-3098
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 808 Rickert Dr Ste 103
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kathi Corral, ARNPNurse Practitioner1891943007
- Mushira Ghoghawala, APRNFamily Nurse Practitioner1992478929
- Mark Hall, M.D.Emergency Medicine Physician1740407873
- Jeffrey Larson, M.D.Family Medicine Physician1144516097
- Lubna Madani, MDFamily Medicine Physician1124349006
- Jessica Mayle, M.D.Emergency Medicine Physician1871933606
Verify John Tharnstrom 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 085-002044Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% more Medicare Part D claims than the average emergency medicine physician in 2024
259 Medicare Part D claims for 183 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Methylprednisolone38 claims
- Albuterol Sulfate Hfa23 claims
- Amoxicillin22 claims
- Nitrofurantoin Mono-Macro18 claims
- Azithromycin13 claims
- Amoxicillin-Clavulanate Potass12 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.
John Tharnstrom among 3,291 emergency medicine physician records in Illinois
John Tharnstrom, PA is one of 3,291 emergency medicine physician records with a practice address in Illinois. 80% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 68% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2023 · 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 207P00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
59 emergency medicine physician records list a practice address in Naperville
They are 59 of the 4,634 NPPES records with a practice address in Naperville, and 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in Naperville → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Mark Batts, MDNaperville, IL 605401619921228
- Kevin Collins, M.D.Naperville, IL 605401558345934
- Rick Gimbel, M.D.Naperville, IL 605401215012380
- Bassam Kawadry, MDNaperville, IL 605401790717502
- John Lee, M.D.Naperville, IL 605401932279965
- Megan McAllister, M.D.Naperville, IL 605401437191855
- Guy Miller, D.O.Naperville, IL 605401700866167
- Linda Mueller, MDNaperville, IL 605401992775803
Common questions
What is John Tharnstrom, PA's NPI number?
John Tharnstrom, PA's National Provider Identifier (NPI) is 1467541227, issued on Oct 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Tharnstrom, PA located?
The NPPES record lists a practice address at 808 Rickert Dr Ste 103, Naperville, IL, 60540. Phone: (331) 551-5854. Providers update this record themselves, so call before visiting.
How can I verify John Tharnstrom, PA's license?
NPPES lists Illinois license number 085-002044, 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 John Tharnstrom, PA prescribe under Medicare Part D?
In 2024, John Tharnstrom, PA had 259 Medicare Part D claims for 183 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.