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

Individual provider Pulmonary Disease Physician · NPI 1649252065

Dr. Oren Schaefer, MD is registered under Pulmonary Disease in Worcester, Massachusetts. Graduated from Geisel School of Medicine at Dartmouth in 1986, 40 years ago. Practices with Mass Lung and Allergy PC, a 13-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
40
Trained at
Geisel School of Medicine at Dartmouth
Licensed in
MA
In the registry since
2005
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

33 Oak Ave
Worcester, MA 01605 Not confirmed with CMS for 14 years — call before visiting
Phone: (508) 926-8240
Fax: (508) 926-8580
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pulmonary Disease Physician (primary) Taxonomy 207RP1001X · Licence 72485 (MA)
Allergy & Immunology (Internal Medicine) Physician Taxonomy 207RA0201X · Licence 72485 (MA)

Record details

NPI number1649252065
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 20, 2005
Last updated in NPPESAugust 14, 2012

Medicare enrollment

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

Medicare specialtyPULMONARY DISEASE
Also practisesALLERGY/IMMUNOLOGY, CRITICAL CARE (INTENSIVISTS)
Medical schoolGEISEL SCHOOL OF MEDICINE AT DARTMOUTH
Graduated 1986 (40 years in practice)
Group practice Mass Lung And Allergy Pc — 13 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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 patients753
Services billed 8,066 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $892 27 payments · a meal or drink at a meeting or visit, not a fee
Education $123 2 payments · educational material or training, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Mass Lung and Allergy PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 13 clinicians in the practice; 10 are shown here.

Other providers in Worcester