Jack Greiner, D.O.
NPI 1588601280 · Ophthalmology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jack Greiner, D.O. is a Ophthalmology Physician provider in Boston, MA (NPI 1588601280).
Provider details
- NPI number
- 1588601280
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- License
- 56366 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,402 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Problem Focused Exam of Visual System92012 | 949 | $93 |
| Established Patient Complete Exam of Visual System92014 | 370 | $131 |
| Closure of Tear Duct Opening Using Plug68761 | 222 | $123 |
| Microfluid Analysis of Tears83861 | 217 | $22 |
| Exam of Visual Field With Extended Testing92083 | 166 | $67 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 147 | $130 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 272 | 98 |
| Prednisolone Acetate | 81 | 57 |
| Ofloxacin | 76 | 57 |
| Brimonidine Tartrate | 75 | 29 |
| Bimatoprostbrand: Lumigan | 73 | 28 |
| Dorzolamide Hcl | 71 | 24 |
| Timolol Maleate | 62 | 23 |
| Erythromycin Basebrand: Erythromycin | 51 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$278 across 17 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-01
- Last updated
- 2007-07-08
Frequently asked questions
- What is Jack Greiner's NPI number?
- Jack Greiner's National Provider Identifier (NPI) is 1588601280, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jack Greiner's specialty?
- Jack Greiner is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Jack Greiner located?
- Jack Greiner's practice location on file with NPPES is 5 Whittier Pl, Boston, MA 02114-1428.
- What is Jack Greiner's phone number?
- The practice phone number listed in the NPPES registry for Jack Greiner is (617) 248-3875.
- Does Jack Greiner accept Medicare?
- Jack Greiner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jack Greiner's NPI active?
- Yes — Jack Greiner's NPI (1588601280) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.