Martha Merz, PA-C
Physician Assistant · Chicago, IL
Martha Merz, PA-C is a physician assistant with a practice address in Chicago, Illinois, and NPI 1629661400, issued on Feb 12, 2021. Check the license (Illinois 085007544, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Martha Merz
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 085007544 IL
Self-reported in NPPES; status is on the state search - Practice location
- 4646 N Marine Dr, Chicago, IL 60640
- Phone
- (773) 878-8700
- Enumerated
- Feb 12, 2021
- Record last updated
- Feb 12, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20211123001923); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,926 in Illinois → Look up another NPI →
Also registered at 4646 N Marine Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Martha Merz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 085007544Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average physician assistant in 2024
149 Medicare Part D claims for 116 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Cephalexin18 claims
- Methylprednisolone18 claims
- Amoxicillin-Clavulanate Potass16 claims
- Nitrofurantoin Mono-Macro15 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.
Bills Medicare through one group practice
- Banner Urgent Care ColoradoFort Collins, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Martha Merz among 4,926 physician assistant records in Illinois
Martha Merz, PA-C is one of 4,926 physician assistant records with a practice address in Illinois. 82% 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 66% of them.
- NPI issued2021 · 66% of these records are older, 29% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2019 · median 2019 among the 3,407 with a school on file
- Record last updated2021 · 35% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,445 physician assistant records list a practice address in Chicago
They are 1,445 of the 63,379 NPPES records with a practice address in Chicago, and 4,926 physician assistant records in Illinois.
All 4,926 in Illinois → Every provider in Chicago → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Bridget Barnebey, PA-CChicago, IL 606401265300693
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- Zlata Janicijevic, PAChicago, IL 606401629292917
- Sahar JiwaniChicago, IL 606401093522252
- Ghadah Karasneh, PAChicago, IL 606401124710520
- Thomas Koch, PA-CChicago, IL 606401720859150
- John Marini, P.A.Chicago, IL 606401144325085
- Daniel Mungul, PA-CChicago, IL 606401609639475
Common questions
What is Martha Merz, PA-C's NPI number?
Martha Merz, PA-C's National Provider Identifier (NPI) is 1629661400, issued on Feb 12, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Martha Merz, PA-C located?
The NPPES record lists a practice address at 4646 N Marine Dr, Chicago, IL, 60640. Phone: (773) 878-8700. Providers update this record themselves, so call before visiting.
How can I verify Martha Merz, PA-C's license?
NPPES lists Illinois license number 085007544, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Martha Merz, PA-C prescribe under Medicare Part D?
In 2024, Martha Merz, PA-C had 149 Medicare Part D claims for 116 beneficiaries; the average among physician assistant prescribers was 830. 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.