Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Daniel Joseph Herr, MD

Individual provider Radiation Oncology Physician · NPI 1174083208

Daniel Joseph Herr, MD practises Radiation Oncology in Portland, Maine. Graduated from Medical University of South Carolina College of Medicine in 2019, 7 years ago. Practices with Mainehealth, a 2,615-clinician group, works from 5 locations and accepts Medicare assignment. Licensed in Maine and New Hampshire.

Years since qualifying
7
Trained at
Medical University of South Carolina College of Medicine
Licensed in
ME, NH
In the registry since
2019
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

22 Bramhall St
Portland, ME 04102-3134
Phone: (207) 662-2526
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (4)

  • 15 Rock Row Ste 110, Westbrook, ME 04092-4877 — (207) 303-3300
  • 11 Rock Row Ste 150, Westbrook, ME 04092-4877 — (207) 303-3300
  • 11 Rock Row Ste 120, Westbrook, ME 04092-4877 — (207) 303-3300
  • 11 Rock Row Ste 320, Westbrook, ME 04092-4877 — (207) 303-3300

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence MD28085 (ME)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence 32004 (NH)

Record details

NPI number1174083208
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 24, 2019
Last updated in NPPESApril 21, 2026
Certification dateApril 21, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyRADIATION ONCOLOGY
Medical schoolMEDICAL UNIVERSITY OF SOUTH CAROLINA COLLEGE OF MEDICINE
Graduated 2019 (7 years in practice)
Group practice Mainehealth — 2615 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients111
Services billed 775 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Mainehealth

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2615 clinicians in the practice; 12 are shown here.

Other providers in Portland