Charles River Eye Associates
NPI 1821106998 · Ophthalmology Physician · Boston, MA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles River Eye Associates is a Ophthalmology Physician organization in Boston, MA (NPI 1821106998).
Provider details
- NPI number
- 1821106998
- Entity type
- Organization
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Jack Greiner, Proprietor(617) 248-3875
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Other names (DBA / former)
- Doing business as
- Jack V Greiner Dba Charles River Eye Associates
Registry dates
- Enumerated
- 2006-08-28
- Last updated
- 2020-08-22
Frequently asked questions
- What is Charles River Eye Associates's NPI number?
- Charles River Eye Associates's National Provider Identifier (NPI) is 1821106998, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Charles River Eye Associates?
- Charles River Eye Associates is classified in the NPPES registry as Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Charles River Eye Associates located?
- Charles River Eye Associates's practice location on file with NPPES is 5 Whittier Place, Boston, MA 02114-1429.
- What is Charles River Eye Associates's phone number?
- The practice phone number listed in the NPPES registry for Charles River Eye Associates is (617) 248-3875.
- Does Charles River Eye Associates accept Medicare?
- Charles River Eye Associates is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Charles River Eye Associates?
- The authorized official listed on Charles River Eye Associates's NPPES record is Jack Greiner, Proprietor. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Charles River Eye Associates's NPI active?
- Yes — Charles River Eye Associates's NPI (1821106998) is active in the NPPES registry as of the last update on 2020-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.