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

William S Jaffee, DO

Individual provider Internal Medicine Physician · NPI 1356738249

William S Jaffee, DO practises Internal Medicine in Portland, Maine. Qualified in 2015, 11 years ago. Practices with Mainehealth, a 2,615-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Massachusetts and Maine.

Years since qualifying
11
Licensed in
MA, ME
In the registry since
2015
Specialties on file
3
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

22 Bramhall St
Portland, ME 04102-3134
Phone: (207) 662-4618
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 759 Chestnut St, Springfield, MA 01199 — (413) 794-0000
  • 181 Main St, Norway, ME 04268-5664 — (207) 743-5933

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence DO3148 (ME)
Internal Medicine Physician Taxonomy 207R00000X · Licence 274614 (MA)
Hospitalist Physician Taxonomy 208M00000X · Licence 274614 (MA)

Record details

NPI number1356738249
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 19, 2015
Last updated in NPPESJanuary 26, 2021
Certification dateJanuary 19, 2021

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesHOSPITALIST
Medical schoolOTHER
Graduated 2015 (11 years in practice)
Group practice Mainehealth — 2615 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 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 patients106
Services billed 165 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