John F. Maciejczyk, M.D.
Emergency Medicine Physician · Danville, PA
John F. Maciejczyk, M.D. is an emergency medicine physician with a practice address in Danville, Pennsylvania, and NPI 1639260102, issued on Sep 27, 2006. Check the license (Pennsylvania MD429837, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- John F. Maciejczyk
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- MD429837 PA
Self-reported in NPPES; status is on the state search - Practice location
- 100 N Academy Ave, Danville, PA 17822
- Phone
- (570) 271-6812
- Enumerated
- Sep 27, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,911 in Pennsylvania → Look up another NPI →
Also registered at 100 N Academy Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John F. Maciejczyk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD429837Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% fewer Medicare Part D claims than the average emergency medicine physician in 2024
133 Medicare Part D claims for 104 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 26 claims were for opioids.
Most prescribed
- Cefdinir15 claims
- Oxycodone Hcl12 claims
- Prednisone11 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.
Industry payments in 2024: $19.53
1 payment: food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
John F. Maciejczyk among 3,911 emergency medicine physician records in Pennsylvania
John F. Maciejczyk, M.D. is one of 3,911 emergency medicine physician records with a practice address in Pennsylvania. 82% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 69% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2007 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
81 emergency medicine physician records list a practice address in Danville
They are 81 of the 3,116 NPPES records with a practice address in Danville, and 3,911 emergency medicine physician records in Pennsylvania.
All 3,911 in Pennsylvania → Every provider in Danville → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- David Dula, M.D.Danville, PA 178221447226436
- Christopher Exner, M.D.Danville, PA 178221003955741
- Michael Fitzpatrick, M.D.Danville, PA 178221629045687
- Robert Frankel, MDDanville, PA 178221205880978
- Douglas Kupas, M.D.Danville, PA 178221447210539
- Michael Leicht, M.D.Danville, PA 178221912968132
- Erica McElroy, D.O.Danville, PA 178221578526133
- Thomas Payton, MDDanville, PA 178221184689598
Common questions
What is John F. Maciejczyk, M.D.'s NPI number?
John F. Maciejczyk, M.D.'s National Provider Identifier (NPI) is 1639260102, issued on Sep 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John F. Maciejczyk, M.D. located?
The NPPES record lists a practice address at 100 N Academy Ave, Danville, PA, 17822. Phone: (570) 271-6812. Providers update this record themselves, so call before visiting.
How can I verify John F. Maciejczyk, M.D.'s license?
NPPES lists Pennsylvania license number MD429837, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John F. Maciejczyk, M.D. prescribe under Medicare Part D?
In 2024, John F. Maciejczyk, M.D. had 133 Medicare Part D claims for 104 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.