Dag Holmsen, M.D.
Anesthesiology Physician · Waterville, ME
Dag Holmsen, M.D. is an anesthesiology physician with a practice address in Waterville, Maine, and NPI 1003862046, issued on May 25, 2006. Check the license (Maine 014378, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Dag Holmsen
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 014378 ME
Self-reported in NPPES; status is on the state search - Practice location
- 149 North St, Waterville, ME 04901
- Phone
- (207) 622-1959
- Enumerated
- May 25, 2006
- Record last updated
- Dec 18, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicaid ID
- 284140099 ME
- Medicare enrollment
- Enrolled (PECOS I20050608000821); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 280 in Maine → Look up another NPI →
Also registered at 149 North St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ahmed Aldilaimi, MDHospitalist Physician1497721849
- Alycia Allen, MSN, NP-CFamily Nurse Practitioner1083046718
- Michael Antoniello, M.D.Emergency Medicine Physician1568470953
- Amethyst Arceo, DOFamily Medicine Physician1801913553
- Timothy Axelson, CRNACertified Registered Nurse Anesthetist1649219353
- Faith Ayepola, MDStudent in an Organized Health Care Education/Training Program1922932417
Verify Dag Holmsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license 014378Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 97.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Kennebec Anesthesia Associates PAWaterville, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Dag Holmsen among 280 anesthesiology physician records in Maine
Dag Holmsen, M.D. is one of 280 anesthesiology physician records with a practice address in Maine. 72% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 47% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1988 · median 2007 among the 192 with a school on file
- Record last updated2013 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anesthesiology Physician providers in Maine
There are 280 anesthesiology physician records in Maine.
All 280 in Maine → Every provider in Waterville → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Michael Bushey, M.D.Waterville, ME 049011073552253
- Jay Neil, MDWaterville, ME 049011770503062
- Carol Swenson, M.D.Waterville, ME 049011245271451
- David Arnold, D.O.Belfast, ME 049151710192786
- Arpita Badami, MDBelfast, ME 049151144323379
- Ronald Kennedy, M.D.Belfast, ME 049151750458071
- Nathaniel Parker, MDBelfast, ME 049151801118773
- Terrance Smith, M.D.Belfast, ME 049151982771556
Common questions
What is Dag Holmsen, M.D.'s NPI number?
Dag Holmsen, M.D.'s National Provider Identifier (NPI) is 1003862046, issued on May 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Dag Holmsen, M.D. located?
The NPPES record lists a practice address at 149 North St, Waterville, ME, 04901. Phone: (207) 622-1959. Providers update this record themselves, so call before visiting.
How can I verify Dag Holmsen, M.D.'s license?
NPPES lists Maine license number 014378, 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.
What is Dag Holmsen, M.D.'s MIPS final score?
The 2023 MIPS final score is 97.1 of 100, reported for the practice group. 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.