Lorenz P. Kielhorn, M.D.
Addiction Medicine (Family Medicine) Physician · Kalamazoo, MI
Lorenz P. Kielhorn, M.D. is an addiction medicine (family medicine) physician with a practice address in Kalamazoo, Michigan, and NPI 1891816427, issued on Apr 2, 2007. Check the license (Michigan 4301042187, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Lorenz P. Kielhorn
- Credential
- M.D.
- Primary taxonomy
- Addiction Medicine (Family Medicine) Physician 207QA0401X
- License number
- 4301042187 MI
Self-reported in NPPES; status is on the state search - Practice location
- 401 Howard St, Kalamazoo, MI 49001
- Phone
- (269) 344-4458
- Enumerated
- Apr 2, 2007
- Record last updated
- Oct 14, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (269) 344-4459
- Entity
- Type 1 · individual
8 nearest addiction medicine (family medicine) physician records → All 37 in Michigan → Look up another NPI →
Also registered at 401 Howard St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Bevin BehrendtAddiction (Substance Use Disorder) Counselor1457626590
- Jordan BewleyAddiction (Substance Use Disorder) Registered Nurse1154185213
- Heather Briegel-McCord, LMSW, CAADCSocial Worker1942686431
- Kerry BurkhartAddiction (Substance Use Disorder) Counselor1760071237
- Christina ByrdAddiction (Substance Use Disorder) Counselor1508521303
Verify Lorenz P. Kielhorn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301042187Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average addiction medicine (family medicine) physician in 2024
96 Medicare Part D claims for 11 beneficiaries, against an average of 664 among the 581 providers of this specialty who prescribed in Part D.
Most prescribed
- Buprenorphine-Naloxone44 claims
- Buprenorphine Hcl13 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.
Lorenz P. Kielhorn among 37 addiction medicine (family medicine) physician records in Michigan
Lorenz P. Kielhorn, M.D. is one of 37 addiction medicine (family medicine) physician records with a practice address in Michigan. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 51% of them.
- NPI issued2007 · 51% of these records are older, 32% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2015 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QA0401X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Addiction Medicine (Family Medicine) Physician providers in Michigan
There are 37 addiction medicine (family medicine) physician records in Michigan.
All 37 in Michigan → Every provider in Kalamazoo → Addiction Medicine (Family Medicine) Physician nationwide →
The 8 addiction medicine (family medicine) physician records with the nearest ZIP codes
- Cicely Moreno, M.D.Niles, MI 491201285171827
- Kristianna Matthewis, MDEssexville, MI 487321235120023
- William Morrone, DOEssexville, MI 487321174513766
- Robert McMorrow, D.O.Houghton Lake, MI 486291093027013
- John Evans, DOSaginaw, MI 486041154509172
- Julie Brockman, APRN-CNPGrandville, MI 494181104668102
- Shelley Schertzer, NPHolland, MI 494231194137059
- James Twesten-Otoole, MDNorton Shores, MI 494411174599344
Common questions
What is Lorenz P. Kielhorn, M.D.'s NPI number?
Lorenz P. Kielhorn, M.D.'s National Provider Identifier (NPI) is 1891816427, issued on Apr 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Lorenz P. Kielhorn, M.D. located?
The NPPES record lists a practice address at 401 Howard St, Kalamazoo, MI, 49001. Phone: (269) 344-4458. Providers update this record themselves, so call before visiting.
How can I verify Lorenz P. Kielhorn, M.D.'s license?
NPPES lists Michigan license number 4301042187, 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 Lorenz P. Kielhorn, M.D. prescribe under Medicare Part D?
In 2024, Lorenz P. Kielhorn, M.D. had 96 Medicare Part D claims for 11 beneficiaries; the average among addiction medicine (family medicine) physician prescribers was 664. 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.