Michael Ross Grey, M.D., M.P.H.
Internal Medicine Physician · New Britain, CT
Michael Ross Grey, M.D., M.P.H. is an internal medicine physician with a practice address in New Britain, Connecticut, and NPI 1881777936, issued on Oct 23, 2006. Check the license (Connecticut 030127, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Michael Ross Grey
- Credential
- M.D., M.P.H.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 030127 CT
Self-reported in NPPES; status is on the state search - Practice location
- 100 Grand St, New Britain, CT 06050
- Phone
- (860) 224-5661
- Enumerated
- Oct 23, 2006
- Record last updated
- Jun 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (860) 224-5785
- Medicare enrollment
- Enrolled (PECOS I20041110000676); accepts Medicare assignment
- Medical or professional school
- University Of Connecticut School Of Medicine, 1984
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 100 Grand St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael Ross Grey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 030127Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,503 Medicare Part D claims for 188 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 11 claims were for opioids.
Most prescribed
- Amlodipine Besylate65 claims
- Atorvastatin Calcium61 claims
- Metformin Hcl56 claims
- Metoprolol Succinate46 claims
- Lisinopril45 claims
- Pantoprazole Sodium42 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: $72.16
3 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Trinity Health OF New England Provider Network Organization IncHartford, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Ross Grey among 2,623 internal medicine physician records in Connecticut
Michael Ross Grey, M.D., M.P.H. is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% 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 11% of them.
- NPI issued2006 · 11% of these records are older, 52% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1984 · median 2004 among the 1,646 with a school on file
- Record last updated2021 · 61% 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 Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
74 internal medicine physician records list a practice address in New Britain
They are 74 of the 1,772 NPPES records with a practice address in New Britain, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in New Britain → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Evelyn Cota Vargas, MDNew Britain, CT 060501487150033
- Larry Broisman, M.D.New Britain, CT 060511174525497
- Robert Dodenhoff, M.D.New Britain, CT 060511710989025
- Catherine Holmes, M.D.New Britain, CT 060511497751168
- Michael Honor, M.D.New Britain, CT 060511831196161
- Askari Jafri, M.D.New Britain, CT 060511164407003
- Gerald McAuliffe, M.D.New Britain, CT 060511710986377
- James Ohara, M.D.New Britain, CT 060511770584724
Common questions
What is Michael Ross Grey, M.D., M.P.H.'s NPI number?
Michael Ross Grey, M.D., M.P.H.'s National Provider Identifier (NPI) is 1881777936, issued on Oct 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Ross Grey, M.D., M.P.H. located?
The NPPES record lists a practice address at 100 Grand St, New Britain, CT, 06050. Phone: (860) 224-5661. Providers update this record themselves, so call before visiting.
How can I verify Michael Ross Grey, M.D., M.P.H.'s license?
NPPES lists Connecticut license number 030127, 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 Michael Ross Grey, M.D., M.P.H. prescribe under Medicare Part D?
In 2024, Michael Ross Grey, M.D., M.P.H. had 1,503 Medicare Part D claims for 188 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.