David C. Mackenzie, MD
Emergency Medicine Physician · Portland, ME
David C. Mackenzie, MD is an emergency medicine physician with a practice address in Portland, Maine, and NPI 1861656886, issued on Jul 18, 2008. Check the license (Maine MD19695, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- David C. Mackenzie
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- MD19695 ME
250207 MA
LP01503 RI
Self-reported in NPPES; status is on the state search - Practice location
- 22 Bramhall St, Portland, ME 04102
- Phone
- (207) 662-7010
- Enumerated
- Jul 18, 2008
- Record last updated
- Sep 16, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (207) 662-7025
- Medicare enrollment
- Enrolled (PECOS I20130828000984); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 466 in Maine → Look up another NPI →
Also registered at 22 Bramhall St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jessica Abbatiello, NP-CFamily Nurse Practitioner1871811737
- Ruslan Abdukalikov, DOAnesthesiology Physician1831694793
- Tod Abrahams, M.D.Diagnostic Radiology Physician1538231642
- Joshua Abrams, PA-CSurgical Physician Assistant1932832128
- Christopher Abruzzese, D.OAnesthesiology Physician1558789305
- Haley Acker, PA-CPhysician Assistant1972167377
Verify David C. Mackenzie in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license MD19695Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average emergency medicine physician in 2024
59 Medicare Part D claims for 52 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Doxycycline Monohydrate13 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.
The MIPS final score for 2023 (Medicare payment program): 98.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- MainehealthPortland, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David C. Mackenzie among 466 emergency medicine physician records in Maine
David C. Mackenzie, MD is one of 466 emergency medicine physician records with a practice address in Maine. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 46% of them.
- NPI issued2008 · 46% of these records are older, 48% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2008 · median 2011 among the 293 with a school on file
- Record last updated2013 · 52% 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 Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
105 emergency medicine physician records list a practice address in Portland
They are 105 of the 6,022 NPPES records with a practice address in Portland, and 466 emergency medicine physician records in Maine.
All 466 in Maine → Every provider in Portland → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Michael Baumann, MDPortland, ME 041021205936010
- Meredith Bennet, MDPortland, ME 041021598865404
- Mark Earnshaw, MDPortland, ME 041021720181431
- Megan Fix, MDPortland, ME 041021578554457
- Mark Fourre, MDPortland, ME 041021588653018
- Samir Haydar, DOPortland, ME 041021598782153
- Christine Hein, MDPortland, ME 041021407940901
- Jonathan Karol, DOPortland, ME 041021528165420
Common questions
What is David C. Mackenzie, MD's NPI number?
David C. Mackenzie, MD's National Provider Identifier (NPI) is 1861656886, issued on Jul 18, 2008. An NPI identifies a provider in billing; it is not a license.
Where is David C. Mackenzie, MD located?
The NPPES record lists a practice address at 22 Bramhall St, Portland, ME, 04102. Phone: (207) 662-7010. Providers update this record themselves, so call before visiting.
How can I verify David C. Mackenzie, MD's license?
NPPES lists Maine license number MD19695, as entered by the provider. Search the Maine Board of Licensure in Medicine at https://www.maine.gov/md/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does David C. Mackenzie, MD prescribe under Medicare Part D?
In 2024, David C. Mackenzie, MD had 59 Medicare Part D claims for 52 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is David C. Mackenzie, MD's MIPS final score?
The 2023 MIPS final score is 98.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.