Chad Achenbach, MD
Infectious Disease Physician · Chicago, IL
Chad Achenbach, MD is an infectious disease physician with a practice address in Chicago, Illinois, and NPI 1548278674, issued on Aug 4, 2006. Check the license (Illinois 036-111770, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Chad Achenbach
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License numbers
- 036-111770 IL
MD00046399 WA
Self-reported in NPPES; status is on the state search - Practice location
- 645 N Michigan Ave, Chicago, IL 60611
- Phone
- (312) 695-5090
- Enumerated
- Aug 4, 2006
- Record last updated
- Jul 13, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20090928000448); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2002
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 464 in Illinois → Look up another NPI →
Also registered at 645 N Michigan Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kim Berg, M.D.Anatomic Pathology & Clinical Pathology Physician1720236359
- Ramona BhatiaInternal Medicine Physician1790930600
- Kenneth Cohen, M.D.Psychiatry Physician1952366551
- Susan Cohn, MDInfectious Disease Physician1306861091
- Sanja Dragovic, MDOphthalmology Physician1902062276
- Claudiu Dumitrescu, PSY.D.Clinical Neuropsychologist1750587549
Verify Chad Achenbach 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 036-111770Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
About as many Medicare Part D claims as the average infectious disease physician in 2024
688 Medicare Part D claims for 52 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 51% of claims.
Most prescribed
- Biktarvy71 claims
- Dovato65 claims
- Descovy39 claims
- Valacyclovir36 claims
- Tivicay34 claims
- Genvoya33 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 MIPS final score for 2023 (Medicare payment program): 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Northwestern Medical Faculty FoundationChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chad Achenbach among 464 infectious disease physician records in Illinois
Chad Achenbach, MD is one of 464 infectious disease physician records with a practice address in Illinois. 79% 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 16% of them.
- NPI issued2006 · 16% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2002 · median 2004 among the 311 with a school on file
- Record last updated2009 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Illinois
There are 464 infectious disease physician records in Illinois.
All 464 in Illinois → Every provider in Chicago → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Maureen Bolon, MDChicago, IL 606111851368773
- Susan Cohn, MDChicago, IL 606111306861091
- John Flaherty, MDChicago, IL 606111821028150
- Shannon Galvin, M.D.Chicago, IL 606111003862400
- Alan Hauser, MDChicago, IL 606111790881647
- Robert Hirschtick, MDChicago, IL 606111730113135
- Robert Murphy, MDChicago, IL 606111558476416
- Gary Noskin, MDChicago, IL 606111154436020
Common questions
What is Chad Achenbach, MD's NPI number?
Chad Achenbach, MD's National Provider Identifier (NPI) is 1548278674, issued on Aug 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Chad Achenbach, MD located?
The NPPES record lists a practice address at 645 N Michigan Ave, Chicago, IL, 60611. Phone: (312) 695-5090. Providers update this record themselves, so call before visiting.
How can I verify Chad Achenbach, MD's license?
NPPES lists Illinois license number 036-111770, 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 Chad Achenbach, MD prescribe under Medicare Part D?
In 2024, Chad Achenbach, MD had 688 Medicare Part D claims for 52 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Chad Achenbach, MD's MIPS final score?
The 2023 MIPS final score is 94.1 of 100. 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.