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

Otto Walter, MD

Individual provider Anatomic Pathology Physician · NPI 1801942628

Otto Walter, MD practises Pathology in Worcester, Massachusetts. Qualified in 1993, 33 years ago. Practices with Ruffolo Hooper and Associates MD PA, a 43-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
33
Licensed in
MA
In the registry since
2007
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

55 Lake Ave N Dept OF Pathology
Worcester, MA 01655-0002 Not confirmed with CMS for 15 years — call before visiting
Phone: (508) 793-6100
Fax: (508) 793-6110
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anatomic Pathology Physician (primary) Taxonomy 207ZP0101X · Licence 239752 (MA)

Record details

NPI number1801942628
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 26, 2007
Last updated in NPPESJuly 27, 2011

Medicare enrollment

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

Medicare specialtyPATHOLOGY
Medical schoolOTHER
Graduated 1993 (33 years in practice)
Group practice Ruffolo Hooper And Associates Md Pa — 43 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients507
Services billed 2,355 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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.

  • Adventhealth Tampa Hospital · Tampa, FL · listed as University Community Hospital, Inc
  • Adventhealth Wesley Chapel Hospital · Wesley Chapel, FL · listed as Pasco-Pinellas Hillsborough Community Health System Inc
  • Adventhealth Dade City Hospital · Dade City, FL
  • Adventhealth North Pinellas Hospital · Tarpon Springs, FL
  • Adventhealth Zephyrhills Hospital · Zephyrhills, FL

Colleagues at Ruffolo Hooper and Associates MD PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 43 clinicians in the practice; 12 are shown here.

Other providers in Worcester