Marilyn May Hallock, M.D.
Emergency Medicine Physician · Chicago, IL
Marilyn May Hallock, M.D. is an emergency medicine physician with a practice address in Chicago, Illinois, and NPI 1336110691, issued on Jan 26, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Marilyn May Hallock
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- ML20008158 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1653 W Congress Pkwy, Chicago, IL 60612
- Phone
- (312) 942-6909
- Enumerated
- Jan 26, 2006
- Record last updated
- Sep 4, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 1653 W Congress Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Raid Abdulla, MDPediatric Cardiology Physician1710037742
- Pooja AgarwalPsychiatry Physician1407411689
- Heidi Aguilar, CRNACertified Registered Nurse Anesthetist1043703796
- Jenny AhnEmergency Registered Nurse1124836622
- Marwah Al Tekreeti, MDAnatomic Pathology & Clinical Pathology Physician1891539268
- Laila Abdulla Al-Harthy, RNRegistered Nurse1619832722
Verify Marilyn May Hallock 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
66% fewer Medicare Part D claims than the average emergency medicine physician in 2024
77 Medicare Part D claims for 50 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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.
Marilyn May Hallock among 3,291 emergency medicine physician records in Illinois
Marilyn May Hallock, M.D. 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 updated2007 · 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).
1,310 emergency medicine physician records list a practice address in Chicago
They are 1,310 of the 63,379 NPPES records with a practice address in Chicago, and 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in Chicago → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Joseph Brawka, M.D.Chicago, IL 606121174599112
- Christopher Caudill, MDChicago, IL 606121013993104
- Galeta Clayton, M.D.Chicago, IL 606121588630743
- Jennifer Fleming, M.D.Chicago, IL 606121912973975
- Jeffrey Grassle, M.D.Chicago, IL 606121205802147
- Mumtaz Husain, M.D.Chicago, IL 606121891761953
- Paula Oldeg, M.D.Chicago, IL 606121568438687
- Rahul Patwari, M.D.Chicago, IL 606121952377020
Common questions
What is Marilyn May Hallock, M.D.'s NPI number?
Marilyn May Hallock, M.D.'s National Provider Identifier (NPI) is 1336110691, issued on Jan 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marilyn May Hallock, M.D. located?
The NPPES record lists a practice address at 1653 W Congress Pkwy, Chicago, IL, 60612. Phone: (312) 942-6909. Providers update this record themselves, so call before visiting.
How can I verify Marilyn May Hallock, M.D.'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.
How much does Marilyn May Hallock, M.D. prescribe under Medicare Part D?
In 2024, Marilyn May Hallock, M.D. had 77 Medicare Part D claims for 50 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.