Gregory Hazen, MD
NPI 1174528863 · Ophthalmology Physician · Saginaw, MI
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Hazen, MD is a Ophthalmology Physician provider in Saginaw, MI (NPI 1174528863).
Provider details
- NPI number
- 1174528863
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4301065631 (MI)
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
21 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
1,510 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) |
|---|---|---|
| Measurement of Corneal Curvature and Depth of Eye92136 | 331 | $36 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 314 | $440 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 218 | $160 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 195 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 105 | $120 |
| Removal of Recurring Cataract in Lens Capsule Using a Laser66821 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Moxifloxacin Hclbrand: Moxifloxacin | 545 | 361 |
| Bromfenac Sodium | 468 | 311 |
| Prednisolone Acetate | 402 | 285 |
| Besifloxacin Hclbrand: Besivance | 299 | 213 |
| Ketorolac Tromethamine | 134 | 97 |
| Latanoprost | 90 | 31 |
| Erythromycin Basebrand: Erythromycin | 85 | 69 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$129 across 1 record (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
- 2005-06-17
- Last updated
- 2021-04-07
- Certified
- 2021-04-07
Frequently asked questions
- What is Gregory Hazen's NPI number?
- Gregory Hazen's National Provider Identifier (NPI) is 1174528863, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Hazen's specialty?
- Gregory Hazen is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Hazen located?
- Gregory Hazen's practice location on file with NPPES is 5161 Cardinal Park Drive, Saginaw, MI 48604.
- What is Gregory Hazen's phone number?
- The practice phone number listed in the NPPES registry for Gregory Hazen is (989) 797-2400.
- Does Gregory Hazen accept Medicare?
- Gregory Hazen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Hazen's NPI active?
- Yes — Gregory Hazen's NPI (1174528863) is active in the NPPES registry as of the last update on 2021-04-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.