Karen L. Janson, MD
Pediatrics Physician · South Haven, MI
Karen L. Janson, MD is a pediatrics physician with a practice address in South Haven, Michigan, and NPI 1083633523, issued on Jul 18, 2006. Check the license (Michigan 4301053992, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Karen L. Janson
- Credential
- MD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- 4301053992 MI
Self-reported in NPPES; status is on the state search - Practice location
- 955 S Bailey Ave, South Haven, MI 49090
- Phone
- (269) 639-2772
- Enumerated
- Jul 18, 2006
- Record last updated
- Nov 22, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (269) 639-2770
- Medicaid ID
- 4546177 T77 MI
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 2,180 in Michigan → Look up another NPI →
Also registered at 955 S Bailey Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Katrina Barrett, FNP-CFamily Nurse Practitioner1215312202
- Gordon Bleil, M.D.Family Medicine Physician1295847739
- Maura Buckingham, D.O.Surgery Physician1992778468
- Hailey Conklin, LMSWClinical Social Worker1831864875
- Philip Durden, CRNACertified Registered Nurse Anesthetist1770537169
- Arlynne Eisner, M.D.Family Medicine Physician1083860597
Verify Karen L. Janson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301053992Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average pediatrics physician in 2024
75 Medicare Part D claims, against an average of 375 among the 5,609 providers of this specialty who prescribed in Part D.
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.
Karen L. Janson among 2,180 pediatrics physician records in Michigan
Karen L. Janson, MD is one of 2,180 pediatrics physician records with a practice address in Michigan. 38% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 56% newer
- In a Medicare fileYes · 38% of these records are
- In the CMS Doctors and Clinicians fileNo · 11% of these records are
- Record last updated2016 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
3 pediatrics physician records list a practice address in South Haven
They are 3 of the 168 NPPES records with a practice address in South Haven, and 2,180 pediatrics physician records in Michigan.
All 2,180 in Michigan → Every provider in South Haven → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Andrea Loder, M.D.South Haven, MI 490901861477903
- Caleb Springsteen, MDSouth Haven, MI 490901366718801
- Cheri BennerThree Rivers, MI 490931316408313
- Seema Salvi, M.D.Three Rivers, MI 490931720060783
- Prudence Barrett, MDSaint Joseph, MI 490851962503326
- Karen Dyer, M.D.Saint Joseph, MI 490851003854530
- Emil Ebner, DOSaint Joseph, MI 490851740541176
- Marmik Patel, MDSaint Joseph, MI 490851922617661
Common questions
What is Karen L. Janson, MD's NPI number?
Karen L. Janson, MD's National Provider Identifier (NPI) is 1083633523, issued on Jul 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen L. Janson, MD located?
The NPPES record lists a practice address at 955 S Bailey Ave, South Haven, MI, 49090. Phone: (269) 639-2772. Providers update this record themselves, so call before visiting.
How can I verify Karen L. Janson, MD's license?
NPPES lists Michigan license number 4301053992, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karen L. Janson, MD prescribe under Medicare Part D?
In 2024, Karen L. Janson, MD had 75 Medicare Part D claims; the average among pediatrics physician prescribers was 375. 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.