Mark Fritz, M.D.
NPI 1669509550 · Ophthalmology Physician · Joliet, IL
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Fritz, M.D. is a Ophthalmology Physician provider in Joliet, IL (NPI 1669509550).
Provider details
- NPI number
- 1669509550
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036099618 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,727 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Complete Exam of Visual System92014 | 578 | $124 |
| Established Patient Problem Focused Exam of Visual System92012 | 567 | $88 |
| Imaging of Optic Nerve92133 | 172 | $36 |
| Exam of Visual Field With Extended Testing92083 | 151 | $63 |
| New Patient Complete Exam of Visual System92004 | 68 | $147 |
| Ultrasound Scan to Determine Eye Length and Lens Power76519 | 63 | $54 |
| Removal of Cataract With Insertion of Prosthetic Lens |
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 | 600 | 136 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 238 | 65 |
| Prednisolone Acetate | 217 | 141 |
| Erythromycin Basebrand: Erythromycin | 169 | 96 |
| Ketorolac Tromethamine | 148 | 86 |
| Ofloxacin | 138 | 92 |
| Brimonidine Tartrate | 95 | 45 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-27
- Last updated
- 2008-06-24
Frequently asked questions
- What is Mark Fritz's NPI number?
- Mark Fritz's National Provider Identifier (NPI) is 1669509550, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Fritz's specialty?
- Mark Fritz is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Fritz located?
- Mark Fritz's practice location on file with NPPES is 212 N Larkin Ave, Joliet, IL 60435-6604.
- What is Mark Fritz's phone number?
- The practice phone number listed in the NPPES registry for Mark Fritz is (815) 741-0666.
- Does Mark Fritz accept Medicare?
- Mark Fritz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Fritz's NPI active?
- Yes — Mark Fritz's NPI (1669509550) is active in the NPPES registry as of the last update on 2008-06-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.