1. Home
  2. Directory
  3. Massachusetts
  4. Boston
  5. Internal Medicine
  6. NPI Profile

ZACHARY S WALLACE M.D.
NPI 1548580913
Internal Medicine - Rheumatology in Boston, MA

Active since June 08, 2010PECOS EnrolledAccepts Medicare Assignment
MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST., BOSTON, MA 02114(617) 726-2865 Get Directions Write a Review

NPPES record last updated: April 1, 2015. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Zachary S Wallace M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ZACHARY S WALLACE M.D. (NPI 1548580913) is an individual rheumatology provider in Boston, Massachusetts, licensed in Massachusetts (253529) and active in the NPI registry since June 2010. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Georgetown University School Of Medicine (2010).

NPPES Registry Identity

NPI1548580913
Entity TypeIndividualMale
Primary Taxonomy207RR0500X
Provider Legal NameZACHARY S WALLACECredential: M.D.
Location AddressMASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.Boston, MA 02114
Mailing AddressMassachusetts General Hospital, 55 Fruit St.Boston, MA 02114 · (617) 726-2865
Phone(617) 726-2865
Sole ProprietorNo
Medical School CMSGeorgetown University School Of MedicineGraduated 2010
Enumeration DateJune 8, 2010
Last NPPES UpdateApril 1, 2015
✔ NPI 1548580913 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
License✔ Licensed in MA · 253529
Definition
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.
Also ListedInternal MedicineTaxonomy 207R00000X · License 253529 (MA)
MASSACHUSETTS GENERAL HOSPITAL, Boston, MA 02114
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Zachary S Wallace M.d. 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.

PECOS PAC ID2466613807
PECOS Enrollment IDI20150106001416
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 2

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
137 services89 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
38 services29 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Massachusetts General Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220071
Location55 Fruit StreetBoston, MA 02114 · Suffolk County
Emergency services Birthing friendly

Newton-Wellesley Hospital

Acute Care Hospitals · Newton, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220101
Location2014 Washington StreetNewton, MA 02462 · Middlesex County
Emergency services Birthing friendly

Brigham And Women's Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220110
Location75 Francis StreetBoston, MA 02115 · Suffolk County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02114 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$144.11 typical visit price
range $63.72 – $189.86
Typical copayment $36.02 (range $15.93 – $47.46)
Most-billed visit code 99204
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

KAITLYN MY-TU LAM MBBS
Internal Medicine (Cardiovascular Disease)
MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114
Suffolk County (617) 724-7738
ALAKA RAY M.D.
Internal Medicine
MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114
Suffolk County (617) 726-2066
MEGHAN E SISE M.D.
Internal Medicine (Nephrology)
MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114
Suffolk County (617) 726-2862
HUGH G AUCHINCLOSS M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery)
MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114
Suffolk County (617) 726-2000
ANGELA M. JACQUES MD
Pediatrics
MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114
Suffolk County (617) 726-2066
NICOLE J LOOK-HONG MD, MSC
Surgery (Surgical Oncology)
MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114
Suffolk County (617) 724-3868
CORINNA M ELLIOTT MA
Student in an Organized Health Care Education/Training Program
MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114
Suffolk County (617) 724-5600
KIRAN J AGARWAL-HARDING MD
Orthopaedic Surgery
MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114
Suffolk County (617) 726-2942

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 Zachary Wallace's NPI number?

The NPI number for Zachary Wallace is 1548580913. It was assigned to this individual provider in the NPPES registry on June 8, 2010.

Where is Zachary Wallace located?

Zachary Wallace practices at Massachusetts General Hospital 55 Fruit St., Boston, MA 02114. The listed phone number is (617) 726-2865.

What is Zachary Wallace's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is Zachary Wallace enrolled in Medicare?

Yes. Zachary Wallace 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.

Is Zachary Wallace affiliated with any hospitals?

According to CMS data, Zachary Wallace is affiliated with Massachusetts General Hospital, Newton-Wellesley Hospital and Brigham And Women's Hospital.

When was this NPI record last updated?

The NPPES record for Zachary Wallace was last updated on April 1, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.