NPPES file of Aug 9, 2026

John B. Casper, M.D.

Addiction Medicine (Internal Medicine) Physician · Hayden, ID

John B. Casper, M.D. is an addiction medicine (internal medicine) physician with a practice address in Hayden, Idaho, and NPI 1275642191, issued on Aug 30, 2006. Check the license (Idaho M4860, as entered in NPPES) on the Idaho Board of Medicine; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1275642191
Name
John B. Casper
Credential
M.D.
Primary taxonomy
Addiction Medicine (Internal Medicine) Physician 207RA0401X
License number
M4860 ID
Self-reported in NPPES; status is on the state search
Practice location
9030 N Hess St Ste 474, Hayden, ID 83835
Phone
(208) 514-0518
Enumerated
Aug 30, 2006
Record last updated
Dec 8, 2025
Fax
(208) 486-4009
Medicare enrollment
Enrolled (PECOS I20040602001327); accepts Medicare assignment
Medical or professional school
University Of Washington School Of Medicine, 1982
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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1 nearest addiction medicine (internal medicine) physician record → All 2 in Idaho → Look up another NPI →

Also registered at 9030 N Hess St Ste 474

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Faith Sawyer Casper, LCPCMental Health Counselor1326389966

Verify John B. Casper in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersIdaho Board of Medicine
    Search for license M4860    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Idaho license search

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65% fewer Medicare Part D claims than the average addiction medicine (internal medicine) physician in 2024

294 Medicare Part D claims for 15 beneficiaries, against an average of 829 among the 401 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.

  1. John Casper294
  2. Specialty average829

Most prescribed

  1. Buprenorphine-Naloxone109 claims
  2. Buprenorphine Hcl42 claims
  3. Alprazolam28 claims
  4. Sertraline Hcl23 claims
  5. Pregabalin14 claims
  6. Methylphenidate Er13 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.

Bills Medicare through one group practice

  1. Medical Consulting Services LLCHayden, ID

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Addiction Medicine (Internal Medicine) Physician providers in Idaho

There are 2 addiction medicine (internal medicine) physician records in Idaho.

All 2 in Idaho → Every provider in Hayden → Addiction Medicine (Internal Medicine) Physician nationwide →

The 1 addiction medicine (internal medicine) physician record with the nearest ZIP codes

  1. Timothy Reed, M.D.Boise, ID 837021083948004

Common questions

What is John B. Casper, M.D.'s NPI number?

John B. Casper, M.D.'s National Provider Identifier (NPI) is 1275642191, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.

Where is John B. Casper, M.D. located?

The NPPES record lists a practice address at 9030 N Hess St Ste 474, Hayden, ID, 83835. Phone: (208) 514-0518. Providers update this record themselves, so call before visiting.

How can I verify John B. Casper, M.D.'s license?

NPPES lists Idaho license number M4860, as entered by the provider. Search the Idaho Board of Medicine at https://dopl.idaho.gov/bom/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does John B. Casper, M.D. prescribe under Medicare Part D?

In 2024, John B. Casper, M.D. had 294 Medicare Part D claims for 15 beneficiaries; the average among addiction medicine (internal medicine) physician prescribers was 829. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.