Dean Delmastro, MD
Internal Medicine Physician · Eau Claire, WI
Dean Delmastro, MD is an internal medicine physician with a practice address in Eau Claire, Wisconsin, and NPI 1699875922, issued on Sep 25, 2006. Check the license (Wisconsin 37184, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Dean Delmastro
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 37184 WI
Self-reported in NPPES; status is on the state search - Practice location
- 900 W Clairemont Ave, Eau Claire, WI 54701
- Phone
- (715) 839-3956
- Enumerated
- Sep 25, 2006
- Record last updated
- Sep 11, 2025
- Medicaid ID
- 32169800 WI
- Medicare enrollment
- Enrolled (PECOS I20060221000906); accepts Medicare assignment
- Medical or professional school
- Rush Medical College Of Rush University, 1988
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 900 W Clairemont Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jaimee Anders, CSFA, CSA, CSTSurgical Assistant1932618295
- Jessica Armstrong, NPNurse Practitioner1619291747
- David Bardsley, M.D.Emergency Medicine Physician1386693711
- Gina BiermanPhysician Assistant1679271860
- Rebecca Blanchette, PTPhysical Therapist1487216024
- Dennis Breen, MDFamily Medicine Physician1417986316
Verify Dean Delmastro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 37184Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average internal medicine physician in 2024
998 Medicare Part D claims for 138 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 55 claims were for opioids.
Most prescribed
- Anastrozole95 claims
- Prednisone66 claims
- Dexamethasone59 claims
- Gabapentin39 claims
- Revlimid36 claims
- Imatinib Mesylate35 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 practice group's MIPS final score for 2023 (Medicare payment program): 78.9 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
- Mchs Hospitals IncMarshfield, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Dean Delmastro among 2,078 internal medicine physician records in Wisconsin
Dean Delmastro, MD is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 46% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1988 · median 2002 among the 1,098 with a school on file
- Record last updated2025 · 55% 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 Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
54 internal medicine physician records list a practice address in Eau Claire
They are 54 of the 3,085 NPPES records with a practice address in Eau Claire, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Eau Claire → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Abdulla Akfaly, MDEau Claire, WI 547011619956224
- Jenifer Bassett, M.D.Eau Claire, WI 547011376503615
- Matthew Cove, MDEau Claire, WI 547011346229952
- Martha Hidalgo, MDEau Claire, WI 547011508864547
- Brian Kosiak, MDEau Claire, WI 547011336150259
- Darren Lokkesmoe, MDEau Claire, WI 547011164401774
- Willie Pangilinan, MDEau Claire, WI 547011639151236
- Kristine Reesman, DOEau Claire, WI 547011275573214
Common questions
What is Dean Delmastro, MD's NPI number?
Dean Delmastro, MD's National Provider Identifier (NPI) is 1699875922, issued on Sep 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Dean Delmastro, MD located?
The NPPES record lists a practice address at 900 W Clairemont Ave, Eau Claire, WI, 54701. Phone: (715) 839-3956. Providers update this record themselves, so call before visiting.
How can I verify Dean Delmastro, MD's license?
NPPES lists Wisconsin license number 37184, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Dean Delmastro, MD prescribe under Medicare Part D?
In 2024, Dean Delmastro, MD had 998 Medicare Part D claims for 138 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Dean Delmastro, MD's MIPS final score?
The 2023 MIPS final score is 78.9 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.