John B. Holtzapple, M.D.
Family Medicine Physician · Eugene, OR
John B. Holtzapple, M.D. is a family medicine physician with a practice address in Eugene, Oregon, and NPI 1588638852, issued on Feb 14, 2006. Check the license (Oregon MD21421, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- John B. Holtzapple
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD21421 OR
Self-reported in NPPES; status is on the state search - Practice location
- 4010 Aerial Way, Eugene, OR 97402
- Phone
- (541) 687-6353
- Enumerated
- Feb 14, 2006
- Record last updated
- Mar 10, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (541) 242-8413
- Medicaid ID
- 276711 OR
- Medicare enrollment
- Enrolled (PECOS I20100325000998); accepts Medicare assignment
- Medical or professional school
- University Of North Carolina At Chapel Hill School Of Medicine, 1995
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,847 in Oregon → Look up another NPI →
Also registered at 4010 Aerial Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Christopher Bolz, M.D.Family Medicine Physician1922070606
- Kari Cox, R.D.Registered Dietitian1033144803
Verify John B. Holtzapple in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD21421Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average family medicine physician in 2024
8,859 Medicare Part D claims for 664 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 269 claims were for opioids.
Most prescribed
- Atorvastatin Calcium529 claims
- Pravastatin Sodium395 claims
- Levothyroxine Sodium376 claims
- Losartan Potassium340 claims
- Amlodipine Besylate310 claims
- Lisinopril299 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
- Peacehealth Medical GroupEugene, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John B. Holtzapple among 2,847 family medicine physician records in Oregon
John B. Holtzapple, M.D. is one of 2,847 family medicine physician records with a practice address in Oregon. 75% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 53% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1995 · median 2009 among the 1,671 with a school on file
- Record last updated2010 · 57% 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 Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
157 family medicine physician records list a practice address in Eugene
They are 157 of the 8,239 NPPES records with a practice address in Eugene, and 2,847 family medicine physician records in Oregon.
All 2,847 in Oregon → Every provider in Eugene → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- William Balsom, MDEugene, OR 974021427028448
- Jeffrey Baxter, M.D.Eugene, OR 974021053383893
- Christopher Bolz, M.D.Eugene, OR 974021922070606
- Donna Byrne, MDEugene, OR 974021043290570
- Sylvia Emory, MDEugene, OR 974021881664803
- Marlon Fletchall, M.D.Eugene, OR 974021902879935
- Michael Garfinkel, MDEugene, OR 974021659341626
- Galen Griffin, MDEugene, OR 974021184604621
Common questions
What is John B. Holtzapple, M.D.'s NPI number?
John B. Holtzapple, M.D.'s National Provider Identifier (NPI) is 1588638852, issued on Feb 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John B. Holtzapple, M.D. located?
The NPPES record lists a practice address at 4010 Aerial Way, Eugene, OR, 97402. Phone: (541) 687-6353. Providers update this record themselves, so call before visiting.
How can I verify John B. Holtzapple, M.D.'s license?
NPPES lists Oregon license number MD21421, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John B. Holtzapple, M.D. prescribe under Medicare Part D?
In 2024, John B. Holtzapple, M.D. had 8,859 Medicare Part D claims for 664 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.