Mass General Brigham (formerly AllWays Health Partners)
Last updated: March 2026
Mass General Brigham (formerly AllWays Health Partners) is a health insurer. They report 460 insurance plans covering 2.2M providers across 49K billing codes.
Data Version
Price Transparency Machine-Readable Files Snapshot
Overview
460
Plans
2.2M
Providers (NPIs)
580K
Tax IDs
49K
Billing Codes
2.5B
Data Rows
Geographic Coverage
Top states by provider count:
Data Breakdown
Plans Type (HIOS vs EIN)
EIN | 460 |
NPIs
Individual | 2M |
Group | 290K |
Tax IDs
EIN | 440K |
NPI (Individual) | 140K |
NPI (Group) | 99 |
Billing Code Type
| Codes | Rows | |
|---|---|---|
CPT | 17K | 1.8B |
HCPCS | 11K | 660M |
CDT | 920 | 19M |
MS-DRG | 800 | 3.5M |
RC | 810 | 1.3M |
CSTM-ALL | 200 | 600K |
APR-DRG | 350 | 320K |
ICD | 17K | 140K |
EAPG | 470 | 60K |
LOCAL | 5 | 5 |
Billing Class
| Rows | |
|---|---|
Professional | 2B |
Institutional | 510M |
Negotiated Type
| Rows | |
|---|---|
Negotiated | 2B |
Derived | 370M |
Fee Schedule | 100M |
Percentage | 7.5M |
Per Diem | 1.3M |
Top States by # NPIs
California | 190K |
Texas | 170K |
New York | 150K |
Florida | 140K |
Pennsylvania | 100K |
Top Taxonomies by # NPIs
Family Nurse Practitioner | 140K |
Clinical Social Worker | 120K |
Family Medicine Physician | 110K |
Physician Assistant | 100K |
Internal Medicine Physician | 100K |
Want to explore Mass General Brigham (formerly AllWays Health Partners)'s actual negotiated rates?
See code-level rates by provider, specialty, and geography.
Historical Metrics
| Month | Plans | NPIs | Tax IDs | Billing Codes | Data Rows |
|---|---|---|---|---|---|
March 2026 | 460 | 2.2M | 580K | 49K | 2.5B |
January 2026 | — | — | — | — | |
December 2025 | — | — | — | — | |
November 2025 | — | — | — | — | |
October 2025 | — | — | — | — |
Show all 12 months
Data Coverage Scorecard
This payer scores 3/6 on data quality (Acceptable). 3 criteria did not meet the threshold.
Professional & Institutional Rates
Data includes both professional and institutional billing class rates
Valid Tax IDs
Less than 80% of Tax IDs are EIN or NPI (Organization) type
HIOS Plan
Data does not include any HIOS-identified plans
Low Derived/Percentage Rates
10% or more of negotiation entries are derived or percentage type
Standard Code Coverage
Sufficient CPT and HCPCS code coverage with low proportion of LOCAL entries
Common Taxonomies
NPIs in the dataset cover at least 50 distinct provider taxonomies
Methodology
The scorecard evaluates each payer's monthly price transparency data against six quality criteria:
If 5–6 criteria pass, the overall rating is Good.
If 3–4 criteria pass, the rating is Acceptable.
If 0–2 criteria pass, the rating is Poor.
Behavioral, RX, and other specialty networks may not pass all criteria but can still contain complete and usable data.