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ROSEMARY A MASON-BLAU APRN
NPI 1255985727
Nurse Practitioner - Family in Lowell, MA

Active since August 01, 2019PECOS EnrolledAccepts Medicare Assignment
161 JACKSON ST, LOWELL, MA 01852(978) 937-9700(978) 221-6728 Get Directions Write a Review

NPPES record last updated: January 3, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 3, 2024, Nov 17, 2023, Sep 19, 2021 and 2 more (5 updates tracked since 2019).

About Rosemary A Mason-blau Aprn NPPES

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

ROSEMARY A MASON-BLAU APRN (NPI 1255985727) is an individual family provider in Lowell, Massachusetts, licensed in Massachusetts (2321155) and active in the NPI registry since August 2019. She is enrolled in Medicare PECOS, is affiliated with Lowell General Hospital, and is a graduate of Other (2019).

NPPES Registry Identity

NPI1255985727
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameROSEMARY A MASON-BLAUCredential: APRN
Location Address161 JACKSON STLowell, MA 01852-2103
Mailing Address161 Jackson StLowell, MA 01852-2103 · (978) 937-9700
Phone(978) 937-9700
Fax(978) 221-6728
Sole ProprietorNo
Medical School CMSOtherGraduated 2019
Enumeration DateAugust 1, 2019
Last NPPES UpdateJanuary 3, 20245 updates tracked since enumeration
NPPES CertifiedJanuary 3, 2024
✔ NPI 1255985727 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
Licenses✔ Licensed in MA · 2321155✔ Licensed in NH · 072061-23
161 JACKSON ST, Lowell, MA 01852
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.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

Rosemary A Mason-blau Aprn 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 ID6800128091
PECOS Enrollment IDI20211201001719
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.

Medicare Billing Reassignments

2

Medicare enrollment records show Rosemary Mason-blau reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Lowell Community Health Center, Inc.
Same address
Federally Qualified Health Center (FQHC)
161 JACKSON ST
Lowell, MA 01852
  • Reassigned Medicare billing, Massachusetts enrollment
  • 135 clinicians in this Medicare group
NPI 1952307530 (978) 322-8590
Minuteclinic Diagnostic Of Massachusetts LLC
34 mi
Family
67D MAIN ST
Medway, MA 02053
  • Reassigned Medicare billing, Massachusetts enrollment
  • 186 clinicians in this Medicare group
NPI 1457470858 (866) 389-2727

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare

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

Lowell General Hospital

Acute Care Hospitals · Lowell, MA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220063
Location295 Varnum AvenueLowell, MA 01854 · Middlesex County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01852 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
$97.64 typical visit price
range $63.72 – $189.86
Typical copayment $24.41 (range $15.93 – $47.46)
Most-billed visit code 99203
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.

DR. BRIAN JOHN PIETRANTONIO O.D.
Optometrist
161 JACKSON ST
LOWELL, MA 01852
Middlesex County (978) 937-9700
MR. DANIEL ALLEN SULLIVAN JR. M.ED.
Counselor (Addiction (Substance Use Disorder))
161 JACKSON ST
LOWELL, MA 01852
Middlesex County (978) 937-9700
EMILY DEPAOLI
Counselor (Mental Health)
161 JACKSON ST
LOWELL, MA 01852
Middlesex County (987) 937-9700
FLORA F SADRI-AZARBAYEJANI DO
Preventive Medicine (Addiction Medicine)
161 JACKSON ST
LOWELL, MA 01852
Middlesex County (978) 937-9700
MICHELLE MARTINEZ CNM, WHNP
Advanced Practice Midwife
161 JACKSON ST
LOWELL, MA 01852
Middlesex County (978) 937-9700
CAROLINE KERN PRIVITT CNM
Advanced Practice Midwife
161 JACKSON ST
LOWELL, MA 01852
Middlesex County (978) 937-9700
NISHA NAIK
Registered Nurse (Community Health)
161 JACKSON ST
LOWELL, MA 01852
Middlesex County (978) 937-9700
JOANNE THERESA HALVORSEN
Counselor (Addiction (Substance Use Disorder))
161 JACKSON ST
LOWELL, MA 01852
Middlesex County (978) 937-9700

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 Rosemary Mason-blau's NPI number?

The NPI number for Rosemary Mason-blau is 1255985727. It was assigned to this individual provider in the NPPES registry on August 1, 2019.

Where is Rosemary Mason-blau located?

Rosemary Mason-blau practices at 161 Jackson St, Lowell, MA 01852. The listed phone number is (978) 937-9700.

What is Rosemary Mason-blau's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Rosemary Mason-blau enrolled in Medicare?

Yes. Rosemary Mason-blau 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 Rosemary Mason-blau's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Rosemary Mason-blau reassigns Medicare benefits to 2 organizations: Lowell Community Health Center, Inc. (Lowell, MA) and Minuteclinic Diagnostic Of Massachusetts LLC (Medway, MA). 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 Rosemary Mason-blau's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Rosemary Mason-blau accept?

Health plans from Anthem Blue Cross and Blue Shield list Rosemary Mason-blau 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 Rosemary Mason-blau affiliated with any hospitals?

According to CMS data, Rosemary Mason-blau is affiliated with Lowell General Hospital.

When was this NPI record last updated?

The NPPES record for Rosemary Mason-blau was last updated on January 3, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.