Ionut A. Mosteanu, M.D.
Internal Medicine Physician · Ridgefield, CT
Ionut A. Mosteanu, M.D. is an internal medicine physician with a practice address in Ridgefield, Connecticut, and NPI 1336300037, issued on Jun 24, 2008. Check the license (Connecticut 049558, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Ionut A. Mosteanu
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 049558 CT
Self-reported in NPPES; status is on the state search - Practice location
- 21 South St, Ridgefield, CT 06877
- Phone
- (203) 438-6541
- Enumerated
- Jun 24, 2008
- Record last updated
- Apr 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (203) 431-0947
- Medicare enrollment
- Enrolled (PECOS I20110706000474); accepts Medicare assignment
- 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 21 South St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jay D'Orso, MDInternal Medicine Physician1578571121
- Jonathan Gordon, M.D.Internal Medicine Physician1124057005
- Satoko Kanahara, MDInternal Medicine Physician1427343722
- Weiming Li, M.D.Internal Medicine Physician1912968090
- Kathleen McAuliffe, FNP- BCFamily Nurse Practitioner1083443881
- Siobhan Meyer, APRN, FNP-BCNurse Practitioner1740532134
Verify Ionut A. Mosteanu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 049558Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average internal medicine physician in 2024
7,064 Medicare Part D claims for 784 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 63 claims were for opioids.
Most prescribed
- Atorvastatin Calcium790 claims
- Amlodipine Besylate346 claims
- Levothyroxine Sodium278 claims
- Lisinopril273 claims
- Losartan Potassium208 claims
- Rosuvastatin Calcium193 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.
The MIPS final score for 2023 (Medicare payment program): 94.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Nuvance Health Medical Practice CT IncRidgefield, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ionut A. Mosteanu among 2,623 internal medicine physician records in Connecticut
Ionut A. Mosteanu, M.D. 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 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2005 · 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).
15 internal medicine physician records list a practice address in Ridgefield
They are 15 of the 473 NPPES records with a practice address in Ridgefield, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Ridgefield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mark Anderson, M.D.Ridgefield, CT 068771679640866
- Lauren Bumby, M.D.Ridgefield, CT 068771407909302
- Jay D'Orso, MDRidgefield, CT 068771578571121
- Frank Delli Carpini, M.D.Ridgefield, CT 068771316272545
- Serafima Glouzgal, MDRidgefield, CT 068771497785166
- Jonathan Gordon, M.D.Ridgefield, CT 068771124057005
- Saragur Jyothi, MDRidgefield, CT 068771225065691
- Satoko Kanahara, MDRidgefield, CT 068771427343722
Common questions
What is Ionut A. Mosteanu, M.D.'s NPI number?
Ionut A. Mosteanu, M.D.'s National Provider Identifier (NPI) is 1336300037, issued on Jun 24, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Ionut A. Mosteanu, M.D. located?
The NPPES record lists a practice address at 21 South St, Ridgefield, CT, 06877. Phone: (203) 438-6541. Providers update this record themselves, so call before visiting.
How can I verify Ionut A. Mosteanu, M.D.'s license?
NPPES lists Connecticut license number 049558, 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 Ionut A. Mosteanu, M.D. prescribe under Medicare Part D?
In 2024, Ionut A. Mosteanu, M.D. had 7,064 Medicare Part D claims for 784 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Ionut A. Mosteanu, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.2 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.