Mark Isaacson, DO
Family Medicine Physician · Middleton, WI
Mark Isaacson, DO is a family medicine physician with a practice address in Middleton, Wisconsin, and NPI 1376519306, issued on Feb 28, 2006. Check the license (Wisconsin 42213, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Isaacson
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 42213 WI
Self-reported in NPPES; status is on the state search - Practice location
- 6947 Harmony Way, Middleton, WI 53562
- Phone
- (608) 831-0106
- Enumerated
- Feb 28, 2006
- Record last updated
- Oct 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,765 in Wisconsin → Look up another NPI →
Verify Mark Isaacson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 42213Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark Isaacson among 3,765 family medicine physician records in Wisconsin
Mark Isaacson, DO is one of 3,765 family medicine physician records with a practice address in Wisconsin. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 46% newer
- In a Medicare fileNo · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2021 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 family medicine physician records list a practice address in Middleton
They are 11 of the 620 NPPES records with a practice address in Middleton, and 3,765 family medicine physician records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,765 in Wisconsin → Every provider in Middleton → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Alexandra Argento-Berrio, MDMiddleton, WI 535621043558638
- Julia Danz, DOMiddleton, WI 535621104483510
- Nickolas Hanna, MDMiddleton, WI 535621487732855
- Daniel Jarzemsky, MDMiddleton, WI 535621154390235
- Pamela Olson, MDMiddleton, WI 535621952379034
- David Ringdahl, MDMiddleton, WI 535621154381457
- Karen Shulman, MDMiddleton, WI 535621043325566
- Joseph Spurgeon, MDMiddleton, WI 535621982702676
Common questions
What is Mark Isaacson, DO's NPI number?
Mark Isaacson, DO's National Provider Identifier (NPI) is 1376519306, issued on Feb 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Isaacson, DO located?
The NPPES record lists a practice address at 6947 Harmony Way, Middleton, WI, 53562. Phone: (608) 831-0106. Providers update this record themselves, so call before visiting.
How can I verify Mark Isaacson, DO's license?
NPPES lists Wisconsin license number 42213, 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. 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.