KATHERINE T LIU MD
NPI 1891056149
Internal Medicine in Portland, ME
About Katherine T Liu Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KATHERINE T LIU MD (NPI 1891056149) is an individual internal medicine provider in Portland, Maine, licensed in Maine (MD21238) and active in the NPI registry since June 2012. She is enrolled in Medicare PECOS, is affiliated with Maine Medical Center, and is a graduate of Medical College Of Wisconsin (2012).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Katherine T Liu Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Katherine Liu reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Portland, ME 04102
- Reassigned Medicare billing, Maine enrollment
- Also billed through NPI 1790896876 (Maine), NPI 1144245028 (Maine)
- 192 clinicians in this Medicare group
Portland, ME 04102
- Reassigned Medicare billing, Maine enrollment
- 3,140 clinicians in this Medicare group
Augusta, ME 04330
- Reassigned Medicare billing, Maine enrollment
- 978 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Maine Medical Center
Acute Care Hospitals · Portland, MEPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 04102 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PORTLAND, ME 04102
PORTLAND, ME 04102
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Katherine Liu's NPI number?
The NPI number for Katherine Liu is 1891056149. It was assigned to this individual provider in the NPPES registry on June 4, 2012.
Where is Katherine Liu located?
Katherine Liu practices at 22 Bramhall St, Portland, ME 04102. The listed phone number is (207) 662-6209.
What is Katherine Liu's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Katherine Liu enrolled in Medicare?
Yes. Katherine Liu is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Katherine Liu's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Liu reassigns Medicare benefits to 3 organizations: Maine Medical Partners (Portland, ME), Mainehealth (Portland, ME) and Mainegeneral Medical Center (Augusta, ME). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Katherine Liu's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Katherine Liu accept?
Health plans from Taro Health list Katherine Liu as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Katherine Liu affiliated with any hospitals?
According to CMS data, Katherine Liu is affiliated with Maine Medical Center.
When was this NPI record last updated?
The NPPES record for Katherine Liu was last updated on May 24, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Katherine T Liu, MD · NPI 1891056149
Internal Medicine physician in Portland, Maine. Individual provider, active in the CMS NPPES registry since June 4, 2012.
## Identity
- **NPI:** 1891056149 (Entity type: Individual)
- **Enumerated:** June 4, 2012
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** MD21238 (Maine)
- **Sole proprietor:** No
## Practice location
- **Address:** 22 BRAMHALL ST, Portland, ME 04102
- **Phone:** (207) 662-6209 · **Fax:** (207) 662-6254
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Maine Medical Partners (NPI 1942315361, Portland, ME); Mainehealth (NPI 1073701157, Portland, ME); Mainegeneral Medical Center (NPI 1083949184, Augusta, ME) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Medical College Of Wisconsin, class of 2012
## Record status
- **NPPES last updated:** May 24, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1891056149) · Data from the CMS NPPES public registry.