# MARK KIEFNER

MARK KIEFNER is an ADHD evaluation provider with an address in PORTLAND, ME, United States.

## Details

- Address: 26 PORTLAND STREET, PORTLAND, ME, 04101
- Phone: [207-761-8402](<tel:2077618402>)
- National Provider Identifier (NPI): 1346457017
- Credentials: PhD
- Provider type: Clinical neuropsychologist
- Source of the listing data: CMS NPI Registry, retrieved 2026-10-03, public, free

## Questions

### Where is MARK KIEFNER?

MARK KIEFNER is at 26 PORTLAND STREET, PORTLAND, ME, 04101.

### How do I contact MARK KIEFNER?

To contact MARK KIEFNER, call 207-761-8402.

### Is MARK KIEFNER accepting new patients?

That is not in the registry data. Call the phone number on the listing and ask about availability, wait times and insurance.

## Source

From [CMS NPI Registry (National Plan and Provider Enumeration System)](https://npiregistry.cms.hhs.gov/api/?version=2.1&number=1346457017), license US government public data. CMS publishes NPPES provider data for open access under its data dissemination notice., checked 2026-10-06.

Last updated October 6, 2026.

## Links

- This ADHD evaluation provider on the [web page](<https://adhdevaluations.fyi/me/portland/mark-kiefner>)
- [ADHD evaluations in PORTLAND](<https://adhdevaluations.fyi/me/portland/category/adhd-evaluations.md>)
- [Clinical neuropsychologists in PORTLAND](<https://adhdevaluations.fyi/me/portland/category/clinical-neuropsychologists.md>)
- [More ADHD evaluation providers in PORTLAND](<https://adhdevaluations.fyi/me/portland.md>)