Collin Martin Greer, MD
Emergency Medicine Physician · Olympia Fields, IL
Collin Martin Greer, MD is an emergency medicine physician with a practice address in Olympia Fields, Illinois, and NPI 1730763657, issued on May 6, 2021. Check the license (Illinois 036171199, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Collin Martin Greer
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 036171199 IL
Self-reported in NPPES; status is on the state search - Practice location
- 20201 Crawford Ave, Olympia Fields, IL 60461
- Phone
- (708) 747-4000
- Enumerated
- May 6, 2021
- Record last updated
- Jul 26, 2024
- Medicare enrollment
- Enrolled (PECOS I20240905000822); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 20201 Crawford Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Veronica Abegunde, MDHospitalist Physician1740500826
- Amir Abusharif, DOStudent in an Organized Health Care Education/Training Program1619663986
- Gremah Adam Aboubacar, DOStudent in an Organized Health Care Education/Training Program1619662392
- Tejaswini Addanki, DOStudent in an Organized Health Care Education/Training Program1306589163
- Saria Adnan Sultan, DOInternal Medicine Physician1679216196
Verify Collin Martin Greer 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 036171199Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% fewer Medicare Part D claims than the average emergency medicine physician in 2024
108 Medicare Part D claims for 84 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin19 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.
Industry payments in 2024: $93.05
1 payment: food and beverage; the largest payer was Lightbody Medical Technologies Inc. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Cepamerica Illinois LLPRockford, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Collin Martin Greer among 3,291 emergency medicine physician records in Illinois
Collin Martin Greer, MD 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 2021, is newer than 82% of them.
- NPI issued2021 · 82% of these records are older, 15% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2020 · median 2012 among the 1,867 with a school on file
- Record last updated2024 · 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).
58 emergency medicine physician records list a practice address in Olympia Fields
They are 58 of the 684 NPPES records with a practice address in Olympia Fields, and 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in Olympia Fields → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- April Brill, D.O.Olympia Fields, IL 604611396984324
- Christopher Colbert, DOOlympia Fields, IL 604611255444915
- Christina Deangelis, D.O.Olympia Fields, IL 604611942449715
- Sarah Green, DOOlympia Fields, IL 604611407849938
- Thomas Green, DOOlympia Fields, IL 604611689668808
- Brian Haag, M.D.Olympia Fields, IL 604611790732949
- Joanna Jackson, D.O.Olympia Fields, IL 604611841430139
- Martha Kelley, D.O.Olympia Fields, IL 604611942279252
Common questions
What is Collin Martin Greer, MD's NPI number?
Collin Martin Greer, MD's National Provider Identifier (NPI) is 1730763657, issued on May 6, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Collin Martin Greer, MD located?
The NPPES record lists a practice address at 20201 Crawford Ave, Olympia Fields, IL, 60461. Phone: (708) 747-4000. Providers update this record themselves, so call before visiting.
How can I verify Collin Martin Greer, MD's license?
NPPES lists Illinois license number 036171199, 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 Collin Martin Greer, MD prescribe under Medicare Part D?
In 2024, Collin Martin Greer, MD had 108 Medicare Part D claims for 84 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.