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

Haven William Spencer, DO

Individual provider Emergency Medicine Physician · NPI 1982193389

Haven William Spencer, DO practises Emergency Medicine in Hyannis, Massachusetts. Graduated from University of New England, College of Osteo Medicine in 2018, 8 years ago. Practices with Cape Cod Emergency Associates LLP, a 33-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
8
Trained at
University of New England, College of Osteo Medicine
Licensed in
MA
In the registry since
2018
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

27 Park St
Hyannis, MA 02601-5203
Phone: (508) 771-1800
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 287099 (MA)

Record details

NPI number1982193389
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 2, 2018
Last updated in NPPESJune 30, 2022
Certification dateJune 30, 2022

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolUNIVERSITY OF NEW ENGLAND, COLLEGE OF OSTEO MEDICINE
Graduated 2018 (8 years in practice)
Group practice Cape Cod Emergency Associates Llp — 33 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of nail tissue 1–10 times
Removal or shaving of skin growth 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients1,238
Services billed 1,513 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

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.

Colleagues at Cape Cod Emergency Associates LLP

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 33 clinicians in the practice; 12 are shown here.

Other providers in Hyannis