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

William D. Lamm, MD

Individual provider Family Medicine Physician · NPI 1639156938

William D. Lamm, MD is registered under Family Practice in Cumberland, Maryland. Graduated from University of Maryland School of Medicine in 1980, 46 years ago. Practices with Transitioncare LLC, a 7-clinician group and accepts Medicare assignment. Licensed in Maryland.

Years since qualifying
46
Trained at
University of Maryland School of Medicine
Licensed in
MD
In the registry since
2005
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

12500 Willowbrook Rd
Cumberland, MD 21502-6393 Not confirmed with CMS for 15 years — call before visiting
Phone: (240) 964-8564
Fax: (240) 964-8563
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence D0025406 (MD)

Record details

NPI number1639156938
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 28, 2005
Last updated in NPPESNovember 11, 2010

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF MARYLAND SCHOOL OF MEDICINE
Graduated 1980 (46 years in practice)
Group practice Transitioncare Llc — 7 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 patients165
Services billed 244 a service is one billed item, such as a visit, a test or a procedure
Average patient age81

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.

  • Mountain City Rehab Center Nursing home · Frostburg, MD · listed as Tarn Mc
  • Western Maryland Regional Medical Center Hospital · Cumberland, MD

Colleagues at Transitioncare LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in Cumberland