Jason L. Greenbaum, MD
Emergency Medicine Physician · Stamford, CT
Jason L. Greenbaum, MD is an emergency medicine physician with a practice address in Stamford, Connecticut, and NPI 1649205493, issued on Jul 11, 2006. Check the license (Connecticut 44305, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Jason L. Greenbaum
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 44305 CT
4301082237 MI
Self-reported in NPPES; status is on the state search - Practice location
- 30 Shelburne RD, Stamford, CT 06902
- Phone
- (330) 493-4443
- Enumerated
- Jul 11, 2006
- Record last updated
- Apr 21, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (330) 493-8677
- Medicare enrollment
- Enrolled (PECOS I20220815002214); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 846 in Connecticut → Look up another NPI →
Also registered at 30 Shelburne RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Adusei, M.D.Addiction Psychiatry Physician1043560287
- Miriam Ambalu, MDEmergency Medicine Physician1639126576
- Erin Ash, MS, CGCGenetic Counselor (M.S.)1538390281
- Robert Babkowski, MDAnatomic Pathology & Clinical Pathology Physician1124006341
- Raymond Baer, MDAnatomic Pathology & Clinical Pathology Physician1609829217
- Bharati Banerjee, MDNeonatal-Perinatal Medicine Physician1740215789
Verify Jason L. Greenbaum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 44305Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% fewer Medicare Part D claims than the average emergency medicine physician in 2024
172 Medicare Part D claims for 126 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 24 claims were for opioids.
Most prescribed
- Ondansetron Odt25 claims
- Oxycodone Hcl21 claims
- Cephalexin18 claims
- Prednisone13 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: $17.00
1 payment: food and beverage; the largest payer was Janssen Pharmaceuticals, 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 2 group practices
- Athol Memorial Hospital IncorporatedAthol, MA
- Henry Heywood Memorial HospitalGardner, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jason L. Greenbaum among 846 emergency medicine physician records in Connecticut
Jason L. Greenbaum, MD is one of 846 emergency medicine physician records with a practice address in Connecticut. 86% 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, 65% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2002 · median 2011 among the 574 with a school on file
- Record last updated2020 · 57% 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 Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Connecticut
There are 846 emergency medicine physician records in Connecticut.
All 846 in Connecticut → Every provider in Stamford → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Miriam Ambalu, MDStamford, CT 069021639126576
- Micah Ambrose, DOStamford, CT 069021962999482
- Yiannis Apergis, M.D.Stamford, CT 069021104176122
- Mark Adrian Bell, DOStamford, CT 069021518428259
- Jomo Coddett, MDStamford, CT 069021336287143
- Jason Fischel, M.D.Stamford, CT 069021689879082
- Michael Francois, M.D.Stamford, CT 069021982139523
- Hieu Hong, MDStamford, CT 069021922662261
Common questions
What is Jason L. Greenbaum, MD's NPI number?
Jason L. Greenbaum, MD's National Provider Identifier (NPI) is 1649205493, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jason L. Greenbaum, MD located?
The NPPES record lists a practice address at 30 Shelburne RD, Stamford, CT, 06902. Phone: (330) 493-4443. Providers update this record themselves, so call before visiting.
How can I verify Jason L. Greenbaum, MD's license?
NPPES lists Connecticut license number 44305, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jason L. Greenbaum, MD prescribe under Medicare Part D?
In 2024, Jason L. Greenbaum, MD had 172 Medicare Part D claims for 126 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.