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

John B Wahlig, MD

Individual provider Neurological Surgery Physician · NPI 1790729051

John B Wahlig, MD practises Neurosurgery in Portland, Maine. Graduated from Columbia University College of Physicians and Surgeons in 1994, 32 years ago. Practices with Mercy Hospital, a 308-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Maine.

Years since qualifying
32
Trained at
Columbia University College of Physicians and Surgeons
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

195 Fore River Pkwy Ste 490
Portland, ME 04102-2780 Not confirmed with CMS for 12 years — call before visiting
Phone: (207) 553-6054
Fax: (207) 553-6076
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Neurological Surgery Physician (primary) Taxonomy 207T00000X · Licence MD16536 (ME)

Record details

NPI number1790729051
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 16, 2006
Last updated in NPPESDecember 12, 2013

Medicare enrollment

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

Medicare specialtyNEUROSURGERY
Medical schoolCOLUMBIA UNIVERSITY COLLEGE OF PHYSICIANS AND SURGEONS
Graduated 1994 (32 years in practice)
Group practice Mercy Hospital — 308 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 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.

Laminectomy or laminotomy (partial removal of spine bones) 55 times · 80th percentile
Spinal fusion 98 times · 73rd percentile

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 patients125
Services billed 282 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

  • Mainehealth Maine Medical Center Hospital · Portland, ME · listed as Maine Medical Center
  • Mainehealth Mid Coast Hospital Hospital · Brunswick, ME
  • Northern Light A R Gould Hospital Hospital · Presque Isle, ME
  • Northern Light Mercy Hospital Hospital · Portland, ME
  • Northern Light Home Care & Hospice Home health agency · So Portland, ME

Colleagues at Mercy Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 308 clinicians in the practice; 12 are shown here.

Other providers in Portland