Ion Dan Grosu, M.D.
Hospitalist Physician · Bangor, ME
Ion Dan Grosu, M.D. is a hospitalist physician with a practice address in Bangor, Maine, and NPI 1255573242, issued on Apr 6, 2009. Check the license (Maine MD19240, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Ion Dan Grosu
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- MD19240 ME
Self-reported in NPPES; status is on the state search - Practice location
- 489 State St, Bangor, ME 04401
- Phone
- (207) 973-7000
- Enumerated
- Apr 6, 2009
- Record last updated
- Oct 19, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (207) 973-5042
- Medicare enrollment
- Enrolled (PECOS I20121126000094); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 245 in Maine → Look up another NPI →
Also registered at 489 State St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kelly Aguilar, M.D.Hospitalist Physician1376938639
- Jill Ahern, CRNACertified Registered Nurse Anesthetist1558469551
- Iftikhar Ahmad, MDDiagnostic Radiology Physician1396904280
- Mohanad Ahmed, MDHospitalist Physician1629797162
Verify Ion Dan Grosu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license MD19240Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% fewer Medicare Part D claims than the average hospitalist physician in 2024
216 Medicare Part D claims for 87 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D.
Most prescribed
- Clopidogrel31 claims
- Eliquis11 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.
Bills Medicare through one group practice
- Eastern Maine Medical CenterBangor, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ion Dan Grosu among 245 hospitalist physician records in Maine
Ion Dan Grosu, M.D. is one of 245 hospitalist physician records with a practice address in Maine. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 40% of them.
- NPI issued2009 · 40% of these records are older, 57% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 84% of these records are
- Graduated2001 · median 2012 among the 206 with a school on file
- Record last updated2012 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
49 hospitalist physician records list a practice address in Bangor
They are 49 of the 3,103 NPPES records with a practice address in Bangor, and 245 hospitalist physician records in Maine.
All 245 in Maine → Every provider in Bangor → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Terry Allen, M.D.Bangor, ME 044011447290572
- Loren Ballestas, DOBangor, ME 044011881614691
- Mohamed Hameed, MDBangor, ME 044011457360067
- Ehab Hanna, MDBangor, ME 044011912916487
- Victor Kelmenson, MDBangor, ME 044011861401341
- Macario Lichauco, MDBangor, ME 044011821026055
- James McCarthy, MDBangor, ME 044011033128525
- Denise Merritt, MDBangor, ME 044011891704391
Common questions
What is Ion Dan Grosu, M.D.'s NPI number?
Ion Dan Grosu, M.D.'s National Provider Identifier (NPI) is 1255573242, issued on Apr 6, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Ion Dan Grosu, M.D. located?
The NPPES record lists a practice address at 489 State St, Bangor, ME, 04401. Phone: (207) 973-7000. Providers update this record themselves, so call before visiting.
How can I verify Ion Dan Grosu, M.D.'s license?
NPPES lists Maine license number MD19240, as entered by the provider. Search the Maine Board of Licensure in Medicine at https://www.maine.gov/md/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ion Dan Grosu, M.D. prescribe under Medicare Part D?
In 2024, Ion Dan Grosu, M.D. had 216 Medicare Part D claims for 87 beneficiaries; the average among hospitalist physician prescribers was 521. 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.