Dr. John F. Maciejczyk, MD
- Medicare services, 2024
- 421
- Medicare patients, 2024
- 235
- Part D claims, 2024
- 133
- Hospital affiliations
- 1
- Industry payments
- $74
- Practice address
- 1800 E Park Ave, State College, PA 16803
- Practice phone
- Call (814) 231-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mount Nittany Medical Center
State College, Pennsylvania
Find Dr. Maciejczyk's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John F. Maciejczyk is an emergency medicine physician in State College, Pennsylvania
Dr. Maciejczyk practices at Mount Nittany Medical Center in State College, Pennsylvania.
Dr. Maciejczyk's NPI, 1639260102, was assigned on September 27, 2006. Dr. Maciejczyk graduated from Temple University School of Medicine in 1999. Dr. Maciejczyk holds Pennsylvania license MD429837.
- NPI
- 1639260102NPI Registry (opens in a new tab)
- NPI enumeration date
- September 27, 2006
- NPI status
- Active
- Practice phone
- (814) 231-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. John F. Maciejczyk practices at Mount Nittany Medical Center in State College, Pennsylvania
Dr. Maciejczyk's primary practice is Mount Nittany Medical Center, at 1800 E Park Ave, State College, PA 16803 in Centre County. The practice phone is (814) 231-7000.
- Mount Nittany Medical Center1800 E Park Ave, State College, PA 16803 · Centre CountyPhone(814) 231-7000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John F. Maciejczyk is affiliated with 2 sites of care and 1 medical group
Dr. Maciejczyk's primary practice is Mount Nittany Medical Center in State College, Pennsylvania. Dr. Maciejczyk is also affiliated with Geisinger Medical Center. The medical group on file is Centre Emergency Medical Associates (CEMA).
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John F. Maciejczyk's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Maciejczyk practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mount Nittany Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John F. Maciejczyk is one of 2,549 emergency medicine physicians in Pennsylvania
Emergency medicine is Dr. Maciejczyk's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Maciejczyk is licensed in Pennsylvania.
Specialties and state licenses
- Emergency medicine, PennsylvaniaPrimary
Emergency medicine physicians near Dr. Maciejczyk
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John F. Maciejczyk billed Medicare for 421 services in 2024
CMS data shows 421 Medicare services from Dr. Maciejczyk across 5 procedure codes in 2024, for 235 Medicare patients. Medicare paid $31,839 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Maciejczyk's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2682024: 2439%
- Tests and treatments
- 2023: 2082024: 17814%
Dr. Maciejczyk compared with the Pennsylvania median for emergency medicine physicians, 2024
- Dr. Maciejczyk
- Pennsylvania median
- Medicare services
- 421vs 24373% above
- Medicare patients
- 235vs 233Close to median
- Part D claims
- 38vs 405% below
Medians across 2,501 emergency medicine physicians in Pennsylvania with Dmand AI profiles that report each measure.
Dr. Maciejczyk's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Maciejczyk?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Maciejczyk and other emergency medicine physicians in Pennsylvania.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John F. Maciejczyk treated 235 Medicare patients in 2024, average age 78
CMS counts 235 Medicare patients who saw Dr. Maciejczyk in 2024. The largest group is 75 to 84, with 90 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 16% are also on Medicaid. Their average risk score is 1.76, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Maciejczyk's median patient age at 54, with 51% women.
Dr. Maciejczyk's Medicare patients by age, 2024
Dr. Maciejczyk's Medicare patients by sex, 2024
- Women14361%
- Men9239%
Chronic conditions among Dr. Maciejczyk's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis46%
- Ischemic heart disease42%
- Chronic kidney disease40%
- Anxiety39%
- Mood disorders36%
- Depression34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Maciejczyk's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women51%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John F. Maciejczyk wrote 133 Medicare Part D claims in 2024
In 2024, Dr. Maciejczyk wrote 133 Medicare Part D claims for 104 patients. 98% of them were for generic drugs. CMS names the drug for 38 of them, across 3 drugs with 11 or more claims each, at $244 in total drug cost. In 2023, CMS named 59 claims across 4 drugs.
Dr. Maciejczyk's Part D claims by kind of drug, 2024
- Generic130 claims98%
- Brand-name and other3 claims2%
Dr. Maciejczyk's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Maciejczyk's Part D claims, 2024
- Opioids20%26 of 133 claims
- Antibiotics47%63 of 133 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 592024: 3836%
Drugs named by CMS: 3 in 2024, 4 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. John F. Maciejczyk received $74 in industry payments from 2023 to 2025
CMS Open Payments shows 4 general payments to Dr. Maciejczyk from 4 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $24.
General payments to Dr. Maciejczyk by program year, 2023 to 2025
Companies that paid Dr. Maciejczyk the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John F. Maciejczyk graduated from Temple University School of Medicine
Dr. Maciejczyk graduated from Temple University School of Medicine in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John F. Maciejczyk's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John F. Maciejczyk
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John F. Maciejczyk's NPI number?
Dr. John F. Maciejczyk's NPI number is 1639260102. It was assigned on September 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John F. Maciejczyk?
Dr. John F. Maciejczyk is an emergency medicine physician in State College, Pennsylvania. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. John F. Maciejczyk practice?
Dr. Maciejczyk practices at 1800 E Park Ave, State College, PA 16803. Dr. Maciejczyk's primary practice is Mount Nittany Medical Center in State College, Pennsylvania.
What is Dr. John F. Maciejczyk's office phone number?
The practice phone on file for Dr. Maciejczyk is (814) 231-7000.
What is Dr. John F. Maciejczyk's medical license number?
Dr. Maciejczyk holds Pennsylvania license MD429837.
Which hospitals is Dr. John F. Maciejczyk affiliated with?
Dr. Maciejczyk is affiliated with Geisinger Medical Center.
What medical group is Dr. John F. Maciejczyk part of?
Dr. Maciejczyk is linked to Centre Emergency Medical Associates (CEMA).
Does Dr. John F. Maciejczyk accept Medicare?
Yes. CMS data shows Dr. Maciejczyk billed Medicare for 421 services in 2024.
How many Medicare patients does Dr. John F. Maciejczyk see?
CMS counts 235 Medicare patients who saw Dr. Maciejczyk in 2024, with an average age of 78.
What services does Dr. John F. Maciejczyk bill to Medicare?
In 2024, Dr. Maciejczyk's most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and emergency department visit (99284).
Show 4 more questionsShow fewer questions
Where did Dr. John F. Maciejczyk go to medical school?
Dr. Maciejczyk graduated from Temple University School of Medicine in 1999.
What drugs does Dr. John F. Maciejczyk prescribe most?
In 2024 Medicare Part D data, Dr. Maciejczyk's most prescribed drugs by claims were Cefdinir, Oxycodone HCl and Prednisone.
Has Dr. John F. Maciejczyk received payments from drug or device companies?
CMS Open Payments shows $74 in general payments to Dr. Maciejczyk from 4 companies from 2023 to 2025. The largest total came from Abbvie Inc.
How long has Dr. John F. Maciejczyk been practicing?
Dr. Maciejczyk graduated from medical school in 1999, 27 years ago.
Selling to emergency medicine practices?
See emergency medicine physicians in Pennsylvania by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card