Gerald M. Farby, M.D.
Internal Medicine Physician · Chicago, IL
Gerald M. Farby, M.D. is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1972504454, issued on Aug 9, 2005. Check the license (Illinois 036052964, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Gerald M. Farby
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036052964 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3048 W Peterson Ave, Chicago, IL 60659
- Phone
- (773) 961-3200
- Enumerated
- Aug 9, 2005
- Record last updated
- Mar 5, 2025
- Medicaid ID
- 36052964 IL
- Medicare enrollment
- Enrolled (PECOS I20120316000057); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 3048 W Peterson Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marina Amusin, M.D.Internal Medicine Physician1750368312
- Nicole Malek, D.O.Family Medicine Physician1235385220
Verify Gerald M. Farby 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 036052964Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.9 times the Medicare Part D claims of the average internal medicine physician in 2024
12,530 Medicare Part D claims for 617 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 488 claims were for opioids.
Most prescribed
- Atorvastatin Calcium629 claims
- Levothyroxine Sodium522 claims
- Amlodipine Besylate436 claims
- Losartan Potassium401 claims
- Hydrocodone-Acetaminophen311 claims
- Furosemide293 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
- Prime Healthcare Illinois Medical Group LLCDes Plaines, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gerald M. Farby among 7,238 internal medicine physician records in Illinois
Gerald M. Farby, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1975 · median 2003 among the 3,580 with a school on file
- Record last updated2025 · 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
- Marina Amusin, M.D.Chicago, IL 606591750368312
- Barry Atlas, M.D.Chicago, IL 606591073513305
- Howard Bartman, M.D.Chicago, IL 606591871528653
- Michael Berger, M.D.Chicago, IL 606591346392545
- Frank Di Maria, DOChicago, IL 606591518950013
- Seema Elahi, M.D.Chicago, IL 606591952326019
- Prith Goomar, M.D.Chicago, IL 606591255347811
- Fauzia Lodhi, MDChicago, IL 606591528111341
Common questions
What is Gerald M. Farby, M.D.'s NPI number?
Gerald M. Farby, M.D.'s National Provider Identifier (NPI) is 1972504454, issued on Aug 9, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gerald M. Farby, M.D. located?
The NPPES record lists a practice address at 3048 W Peterson Ave, Chicago, IL, 60659. Phone: (773) 961-3200. Providers update this record themselves, so call before visiting.
How can I verify Gerald M. Farby, M.D.'s license?
NPPES lists Illinois license number 036052964, 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 Gerald M. Farby, M.D. prescribe under Medicare Part D?
In 2024, Gerald M. Farby, M.D. had 12,530 Medicare Part D claims for 617 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.