Provider networks in Massachusetts.
InPlan holds provider listings for 18 Medicare Advantage plans that serve Massachusetts. Ask whether a plan lists a provider and get the answer with its source type and the date we read the directory.
- MEDICARE ADVANTAGE PLANS
- 18
- PLAN YEARS
- 2027
- INSURERS AND PLAN ORGANIZATIONS
- 3
- LATEST READ
- 2026-10-29
What we hold in Massachusetts.
Plans whose provider directories list providers in our data.
| MARKET | PLANS | INSURERS | PLAN YEARS | LATEST READ |
|---|---|---|---|---|
| Medicare Advantage | 18 | 3 | 2027 | 2026-10-29 |
How we count: a plan counts when its provider directory lists at least one provider in our data. A provider-plan link is one listing of one provider in one plan. For marketplace plans it counts each plan year and network tier the directory gives; for Medicare Advantage plans it counts each provider once per plan.
Insurers in Massachusetts.
Plans with provider listings for each insurer or plan organization, as they publish their names. A Medicare Advantage plan counts in every state it serves.
| INSURER | MARKET | PLANS |
|---|---|---|
| Health New England Medicare Advantage Plans | Medicare Advantage | 8 |
| Blue Cross Blue Shield of Massachusetts | Medicare Advantage | 7 |
| Molina Healthcare | Medicare Advantage | 3 |
Who the Medicare Advantage directories list.
More than 41,000 providers who practise in Massachusetts appear in the Medicare Advantage plans we hold. The most common primary specialties among them:
- Nurse Practitioner5,464
- Clinical Social Worker4,295
- Internal Medicine2,878
- Physician Assistant2,754
- Dentist2,638
- Mental Health Counselor2,243
- Physical Therapist in Private Practice1,982
- Clinical Psychologist1,462
Specialties as the national provider registries record them. A provider counts once per specialty.
Example plans in Massachusetts.
Plans with the most provider-plan links, with the plan ID the API takes. Look any plan ID up for free with the plan ID lookup.
| PLAN | PLAN ID | YEAR | TYPE | PROVIDER-PLAN LINKS |
|---|---|---|---|---|
| Medicare PPO Blue PlusRx (PPO)Blue Cross Blue Shield of Massachusetts | H2230-002-000 | 2027 | Medicare AdvantagePPO | 71,232 |
| Medicare PPO Blue EssentialRx (PPO)Blue Cross Blue Shield of Massachusetts | H2230-019-000 | 2027 | Medicare AdvantagePPO | 71,232 |
| Medicare HMO Blue PlusRx (HMO)Blue Cross Blue Shield of Massachusetts | H2261-005-000 | 2027 | Medicare AdvantageHMO | 71,232 |
| Medicare HMO Blue SaverRx (HMO-POS)Blue Cross Blue Shield of Massachusetts | H2261-024-000 | 2027 | Medicare AdvantageHMO-POS | 71,232 |
| Senior Whole Health SCO (HMO D-SNP)Molina Healthcare of Massachusetts | H2224-001-000 | 2027 | Medicare AdvantageHMO D-SNP · Special Needs Plan | 16,736 |
A real Massachusetts answer.
Kimberly B. Abdow, NP, who practises in Worcester, is listed in H2230-002-000. This is the answer the API gives today for that pair, with its source type and the date we read the listing.
curl -H "Authorization: Bearer $INPLAN_KEY" \ "https://api.inplan.io/v1/check?npi=1003007477&plan_id=H2230-002-000"
{
"npi": "1003007477",
"plan_id": "H2230-002-000",
"market": "ma",
"in_network": true,
"answer": "listed",
"plan_year": 2027,
"source": { "type": "plan_directory", "as_of": "2026-10-29" }
}Kimberly B. Abdow, NP
Nurse Practitioner · Worcester, MA
Listed
- PLAN
- Medicare PPO Blue PlusRx (PPO)
- INSURER
- Blue Cross Blue Shield of Massachusetts
- MARKET
- Medicare Advantage, plan year 2027
- PLAN TYPE
- PPO
- NEW PATIENTS
- Accepting, per the directory
- SOURCE
- plan_directory · read 2026-10-29
Every Massachusetts provider, with every plan that lists them.
The Massachusetts data file is one CSV: one row for each provider and plan pair, for every provider practising in Massachusetts, with the source type and read date on each row.
Check Massachusetts providers in your own product.
Send an NPI and a plan ID, get an answer with its evidence. Or ask for every plan that lists a provider. A free key gives 500 calls a month.
Other states
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maryland
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Puerto Rico
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Figures counted 2026-10-30. Sources: provider directories published by insurers and plans; public plan and provider registries. InPlan is independent and not affiliated with any insurer named here.