David R. Isaacson, MD
Hospitalist Physician · Janesville, WI
David R. Isaacson, MD is a hospitalist physician with a practice address in Janesville, Wisconsin, and NPI 1073562179, issued on May 8, 2006. Check the license (Wisconsin 56921-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- David R. Isaacson
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- 56921-20 WI
1907851 NY
Self-reported in NPPES; status is on the state search - Practice location
- 1000 Mineral Point Ave, Janesville, WI 53548
- Phone
- (608) 756-6261
- Enumerated
- May 8, 2006
- Record last updated
- Feb 5, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (068) 756-6236
- Medicaid IDs
- 02356898 NY
1073562179 WI - Medicare enrollment
- Enrolled (PECOS I20120419000437); accepts Medicare assignment
- Medical or professional school
- University Of Rochester School Of Medicine And Dentistry, 1991
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 894 in Wisconsin → Look up another NPI →
Also registered at 1000 Mineral Point Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify David R. Isaacson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 56921-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Mercy Health System CorporationJanesville, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David R. Isaacson among 894 hospitalist physician records in Wisconsin
David R. Isaacson, MD is one of 894 hospitalist physician records with a practice address in Wisconsin. 91% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 81% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 86% of these records are
- Graduated1991 · median 2011 among the 768 with a school on file
- Record last updated2015 · 29% 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 Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Wisconsin
There are 894 hospitalist physician records in Wisconsin.
All 894 in Wisconsin → Every provider in Janesville → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Numan Aziz, M.D.Janesville, WI 535481275114167
- Orson Bangert, D.O.Janesville, WI 535481235455437
- Atiya Siddiqui, MDJanesville, WI 535481356597421
- Navneet Sidhu, M.D.Janesville, WI 535481568540011
- Jason Welch, MDJanesville, WI 535481316094931
- Venkata Niharika Yadavalli, MDJanesville, WI 535481578947354
- Chijen Chen, M.D.Janesville, WI 535461912589946
- William Clanfield, MDJanesville, WI 535461326085648
Common questions
What is David R. Isaacson, MD's NPI number?
David R. Isaacson, MD's National Provider Identifier (NPI) is 1073562179, issued on May 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David R. Isaacson, MD located?
The NPPES record lists a practice address at 1000 Mineral Point Ave, Janesville, WI, 53548. Phone: (608) 756-6261. Providers update this record themselves, so call before visiting.
How can I verify David R. Isaacson, MD's license?
NPPES lists Wisconsin license number 56921-20, 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.
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.