What is Susan Liu's NPI number?

Susan Liu's National Provider Identifier (NPI) is 1033641774, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Susan Liu's specialty?

Susan Liu is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).

Where is Susan Liu located?

Susan Liu's practice location on file with NPPES is 485 Arsenal St, Watertown, MA 02472-5091.

What is Susan Liu's phone number?

The practice phone number listed in the NPPES registry for Susan Liu is (617) 972-5570.

Does Susan Liu accept Medicare?

Susan Liu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Susan Liu's NPI active?

Yes — Susan Liu's NPI (1033641774) is active in the NPPES registry as of the last update on 2023-06-04.

IndividualActiveAccepts Medicare

Susan Liu, MD

NPI 1033641774 · Pediatrics Physician · Watertown, MA

Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Susan Liu, MD is a Pediatrics Physician provider in Watertown, MA (NPI 1033641774).

Provider details

NPI number: 1033641774
Entity type: Individual
Primary specialty: Pediatrics PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Female
Sole proprietor: No

Specialties & taxonomies

Pediatrics PhysicianPrimary208000000XLicense 1014133 (MA)
Allopathic & Osteopathic Physicians
Student in an Organized Health Care Education/Training Program390200000X
Student, Health Care
Pediatrics Physician208000000XLicense 35.138934 (OH)
Allopathic & Osteopathic Physicians

Profile Score

Established profile(73/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
9 yrs in NPPES registry
Profile completeness38% of score
83% of core fields populated
Practice footprint23% of score
3 documented practice locations

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

485 Arsenal St

Watertown, MA 02472-5091

Phone: (617) 972-5570

Fax: (617) 972-5593

Street-level locationGet directions

More MA providers

Mailing address

485 Arsenal St

Watertown, MA 02472-5091

Additional practice locations (2)

11100 Euclid Ave
Cleveland, OH 44106-1716
Phone: (216) 844-3641
805 Columbia Rd Ste 102
Westlake, OH 44145-1461
Phone: (440) 808-1925

Enumerated: 2017-03-31
Last updated: 2023-06-04
Certified: 2023-06-04

Frequently asked questions

What is Susan Liu's NPI number?: Susan Liu's National Provider Identifier (NPI) is 1033641774, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Susan Liu's specialty?: Susan Liu is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
Where is Susan Liu located?: Susan Liu's practice location on file with NPPES is 485 Arsenal St, Watertown, MA 02472-5091.
What is Susan Liu's phone number?: The practice phone number listed in the NPPES registry for Susan Liu is (617) 972-5570.
Does Susan Liu accept Medicare?: Susan Liu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Susan Liu's NPI active?: Yes — Susan Liu's NPI (1033641774) is active in the NPPES registry as of the last update on 2023-06-04.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.