JACK V GREINER D.O.
NPI 1588601280
Ophthalmology in Boston, MA
About Jack V Greiner D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JACK V GREINER D.O. (NPI 1588601280) is an individual ophthalmology provider in Boston, Massachusetts, licensed in Massachusetts (56366) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of Midwestern University, Chicago College Of Osteopathic Med (1982).
NPPES Registry Identity
Specialties & Licenses
Accepted 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
Jack V Greiner D.o. 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
2Medicare enrollment records show Jack Greiner reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
Andover, MA 01810
- Reassigned Medicare billing, Massachusetts enrollment
- 18 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 15
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.
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.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Jack Greiner's NPI number?
The NPI number for Jack Greiner is 1588601280. It was assigned to this individual provider in the NPPES registry on June 1, 2006.
Where is Jack Greiner located?
Jack Greiner practices at 5 Whittier Pl Ste 102 Charles River Eye Associates, Boston, MA 02114. The listed phone number is (617) 248-3875.
What is Jack Greiner's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Jack Greiner enrolled in Medicare?
Yes. Jack Greiner 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 Jack Greiner's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jack Greiner reassigns Medicare benefits to 2 organizations: Charles River Eye Associates (Boston, MA) and Andover Eye Associates, Inc (Andover, 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 Jack Greiner's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Jack Greiner accept?
Health plans from Anthem Blue Cross and Blue Shield list Jack Greiner 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.
When was this NPI record last updated?
The NPPES record for Jack Greiner was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.
# Jack V Greiner, D.O. · NPI 1588601280
Ophthalmology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since June 1, 2006.
## Identity
- **NPI:** 1588601280 (Entity type: Individual)
- **Enumerated:** June 1, 2006
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** 56366 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 5 WHITTIER PL, STE 102 CHARLES RIVER EYE ASSOCIATES, Boston, MA 02114-1428
- **Phone:** (617) 248-3875
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Charles River Eye Associates (NPI 1821106998, Boston, MA); Andover Eye Associates, Inc (NPI 1588678551, Andover, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Midwestern University, Chicago College Of Osteopathic Med, class of 1982
## Record status
- **NPPES last updated:** July 13, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1588601280) · Data from the CMS NPPES public registry.