Rachel Anne O'Mara, MD
Internal Medicine Physician · Chicago, IL
Rachel Anne O'Mara, MD is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1891701702, issued on Jul 31, 2006. Check the license (Illinois 036-113766, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Rachel Anne O'Mara
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036-113766 IL
Self-reported in NPPES; status is on the state search - Practice location
- 676 N Saint Clair St, Chicago, IL 60611
- Phone
- (312) 926-0444
- Enumerated
- Jul 31, 2006
- Record last updated
- Feb 12, 2026
- Fax
- (312) 926-2797
- Medicare enrollment
- Enrolled (PECOS I20061122000434); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 1999
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 676 N Saint Clair St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Cara Angelotta, MDPsychiatry Physician1194017525
Verify Rachel Anne O'Mara 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 036-113766Check 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 internal medicine physician in 2024
1,094 Medicare Part D claims for 63 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims. 11 claims were for opioids.
Most prescribed
- Atorvastatin Calcium133 claims
- Amlodipine Besylate73 claims
- Losartan-Hydrochlorothiazide68 claims
- Ezetimibe65 claims
- Levothyroxine Sodium62 claims
- Omeprazole38 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.
Rachel Anne O'Mara among 7,238 internal medicine physician records in Illinois
Rachel Anne O'Mara, MD 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 61% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1999 · median 2003 among the 3,580 with a school on file
- Record last updated2026 · 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
- Kenneth Arbetter, MDChicago, IL 606111336132851
- Steven Gallo, MDChicago, IL 606111548253024
- Arnold Grauer, MDChicago, IL 606111619960184
- James Hall, MDChicago, IL 606111649263153
- Frances Langdon, MDChicago, IL 606111063405546
- Michael Lee, MDChicago, IL 606111942293451
- Hazel Manzano, MDChicago, IL 606111801889316
- Chadwick Milstead, MDChicago, IL 606111740273259
Common questions
What is Rachel Anne O'Mara, MD's NPI number?
Rachel Anne O'Mara, MD's National Provider Identifier (NPI) is 1891701702, issued on Jul 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Rachel Anne O'Mara, MD located?
The NPPES record lists a practice address at 676 N Saint Clair St, Chicago, IL, 60611. Phone: (312) 926-0444. Providers update this record themselves, so call before visiting.
How can I verify Rachel Anne O'Mara, MD's license?
NPPES lists Illinois license number 036-113766, 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 Rachel Anne O'Mara, MD prescribe under Medicare Part D?
In 2024, Rachel Anne O'Mara, MD had 1,094 Medicare Part D claims for 63 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.