DR. HENRY JOHN MEROLA M.D.
NPI 1902963986
Internal Medicine in Waltham, MA
About Dr. Henry John Merola M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. HENRY JOHN MEROLA M.D. (NPI 1902963986) is an individual internal medicine provider in Waltham, Massachusetts, licensed in Massachusetts (59659) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, is affiliated with St Elizabeth's Medical Center, and is a graduate of Other (1985).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
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
Dr. Henry John Merola 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.
Medicare Billing Reassignments
3Medicare enrollment records show Henry Merola reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Watertown, MA 02472
- Reassigned Medicare billing, Massachusetts enrollment
- 1,103 clinicians in this Medicare group
North Andover, MA 01845
- Reassigned Medicare billing, Massachusetts enrollment
- 8 clinicians in this Medicare group
Brockton, MA 02301
- Reassigned Medicare billing, Massachusetts enrollment
- 264 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
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.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St Elizabeth's Medical Center
Acute Care Hospitals · Brighton, MAMassachusetts General Hospital
Acute Care Hospitals · Boston, MANewton-Wellesley Hospital
Acute Care Hospitals · Newton, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MALahey Hospital & Medical Center, Burlington
Acute Care Hospitals · Burlington, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02453 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 17
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WALTHAM, MA 02453
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 Henry Merola's NPI number?
The NPI number for Henry Merola is 1902963986. It was assigned to this individual provider in the NPPES registry on January 2, 2007.
Where is Henry Merola located?
Henry Merola practices at 32 South St Suite 205, Waltham, MA 02453. The listed phone number is (781) 894-8200.
What is Henry Merola's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Henry Merola enrolled in Medicare?
Yes. Henry Merola 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 Henry Merola's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Henry Merola reassigns Medicare benefits to 3 organizations: Steward Medical Group, Inc (Watertown, MA), Core Care Clinic LLC (North Andover, MA) and Revere Medical Of Massachusetts, PC (Brockton, 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 Henry Merola's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Henry Merola affiliated with any hospitals?
According to CMS data, Henry Merola is affiliated with St Elizabeth's Medical Center, Massachusetts General Hospital, Newton-Wellesley Hospital, Brigham And Women's Hospital and Lahey Hospital & Medical Center, Burlington.
When was this NPI record last updated?
The NPPES record for Henry Merola was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Dr. Henry John Merola, M.D. · NPI 1902963986
Internal Medicine physician in Waltham, Massachusetts. Individual provider, active in the CMS NPPES registry since January 2, 2007.
## Identity
- **NPI:** 1902963986 (Entity type: Individual)
- **Enumerated:** January 2, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 59659 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 32 SOUTH ST, SUITE 205, Waltham, MA 02453-3594
- **Phone:** (781) 894-8200 · **Fax:** (781) 894-8202
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Steward Medical Group, Inc (NPI 1629398219, Watertown, MA); Core Care Clinic LLC (NPI 1316784457, North Andover, MA); Revere Medical Of Massachusetts, PC (NPI 1336976539, Brockton, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1985
## Record status
- **NPPES last updated:** March 7, 2023
- **Other identifiers:** Other 1902963986 (MA); Medicaid 3145221 (MA); Other J07727 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1902963986) · Data from the CMS NPPES public registry.