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

Thomas C Hattan, MD

Individual provider Geriatric Medicine (Internal Medicine) Physician · NPI 1598708315

Thomas C Hattan, MD practises Internal Medicine in Lewiston, Maine. Graduated from Saint Louis University School of Medicine in 1999, 27 years ago. Practices with Central Maine Medical Center, a 347-clinician group and accepts Medicare assignment. Licensed in Maine.

Years since qualifying
27
Trained at
Saint Louis University School of Medicine
Licensed in
ME
In the registry since
2006
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

76 High St
Lewiston, ME 04240-7649 Not confirmed with CMS for 16 years — call before visiting
Phone: (207) 795-2800
Fax: (207) 795-2802
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Geriatric Medicine (Internal Medicine) Physician (primary) Taxonomy 207RG0300X · Licence 017438 (ME)

Record details

NPI number1598708315
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 13, 2006
Last updated in NPPESOctober 21, 2010

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolSAINT LOUIS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1999 (27 years in practice)
Group practice Central Maine Medical Center — 347 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 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 patients281
Services billed 924 a service is one billed item, such as a visit, a test or a procedure
Average patient age79

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.

  • Central Maine Medical Center Hospital · Lewiston, ME
  • Rumford Hospital Hospital · Rumford, ME
  • St Mary'S Regional Medical Center Hospital · Lewiston, ME
  • Clover Health Care Nursing home · Auburn, ME · listed as Vop Auburn LLC
  • Rumford Community Home Nursing home · Rumford, ME · listed as Rumford Community Home Corporation
  • Andwell Health Partners Home health agency · Lewiston, ME
  • Centerwell Home Health Home health agency · South Portland, ME
  • Andwell Health Partners Hospice · Lewiston, ME
  • Beacon Hospice, An Amedisys Company Hospice · Auburn, ME
  • Russell Park Rehabilitation & Living Center Nursing home · Lewiston, ME

Colleagues at Central Maine Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 347 clinicians in the practice; 12 are shown here.

Other providers in Lewiston