John Mastroni, MD
NPI 1568420008 · Ophthalmology Physician · Eureka, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Mastroni, MD is a Ophthalmology Physician provider in Eureka, CA (NPI 1568420008).
Provider details
- NPI number
- 1568420008
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- License
- G76915 (CA)
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
20 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
8,977 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 Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 2,032 | $96 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,529 | $135 |
| Imaging of Retina92134 | 1,428 | $43 |
| Injection of Drug Into Eye67028 | 1,004 | $129 |
| Imaging of Optic Nerve92133 | 852 | $39 |
| Compounded Drug, Not Otherwise ClassifiedJ7999 | 784 | $92 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 1,752 | 460 |
| Brimonidine Tartrate | 619 | 166 |
| Timolol Maleate | 515 | 158 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 475 | 121 |
| Dorzolamide Hcl | 398 | 127 |
| Bimatoprostbrand: Lumigan | 300 | 73 |
| Netarsudil Mesylat/Latanoprostbrand: Rocklatan | 210 | 47 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-03
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Mastroni's NPI number?
- John Mastroni's National Provider Identifier (NPI) is 1568420008, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Mastroni's specialty?
- John Mastroni is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is John Mastroni located?
- John Mastroni's practice location on file with NPPES is 2840 Oneil Lane, Eureka, CA 95503.
- What is John Mastroni's phone number?
- The practice phone number listed in the NPPES registry for John Mastroni is (707) 443-9777.
- Does John Mastroni accept Medicare?
- John Mastroni is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Mastroni's NPI active?
- Yes — John Mastroni's NPI (1568420008) 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.