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Edit this profileAt a glance
- 101 S San Mateo Dr, Suite 310, San Mateo, CA 94401
About Dr. Drinnan
Michael J. Drinnan, MD is a healthcare provider in San Mateo, CA specializing in ophthalmology. According to Medicare claims data, Michael cared for 1,023 Medicare patients across 1,107 services. The services billed most often include established patient complete exam of visual system, photography of the retina, and measurement of corneal curvature and depth of eye. This provider record is associated with NPI 1609883024.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (650) 342-7474
- Email not available
Practice Locations
101 S SAN MATEO DR SUITE 310
San Mateo, CA 94401
Conditions Commonly Evaluated or Treated
Within Ophthalmology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Eye injury and cancer
Inflammation, neurologic, and orbit
Most searched conditions
Cornea and external eye
Eyelid and tear drainage
Refractive and focusing
- Astigmatism
- Eye misalignment (strabismus)
- Farsightedness
- Lazy eye (amblyopia)
- Nearsightedness
- Presbyopia
Retina and vitreous
Eye injuries
Retina & vitreous
Procedures & services
Cataract and lens
- Cataract surgery with lens implant
- Laser-assisted cataract surgery
- Intraocular lens exchange
- YAG laser capsulotomy
Cornea and refractive
Emergency and minor
- Corneal rust-ring removal
- Removal of an eye foreign body
- Repair of an eye or eyelid laceration
- Repair of ruptured globe
Examination and imaging
- Eye ultrasound
- Slit-lamp examination
- Visual-field testing
- Corneal topography
- Fluorescein angiography
Eyelid, tear duct, and muscle
- Chalazion removal
- Ectropion repair
- Eyelid surgery
- Tear-duct probing
- Drooping-eyelid repair
- Entropion repair
- Eye-muscle surgery
- Tear-duct bypass surgery
Glaucoma
- Cyclophotocoagulation
- Trabeculectomy
- Glaucoma drainage-device implantation
- Laser peripheral iridotomy
- Minimally invasive glaucoma surgery
- Selective laser trabeculoplasty
Retina
Most searched procedures
Corneal procedures
Eye diagnostics
Eye injuries
Eyelid surgery
Laser eye surgery
Laser procedures
Laser vision correction
Refractive surgery
Tear duct & Orbit
Procedures Most Often Billed to Medicare
1,107 services · 1,023 patients · 13 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of cataract with insertion of prosthetic lens | Procedure | 66984 |
75 | As often as other peers in Ophthalmology |
| Removal of recurring cataract in lens capsule using a laser | Procedure | 66821 |
29 | Less often than most peers in Ophthalmology |
| Complex removal of cataract with insertion of prosthetic lens | Procedure | 66982 |
21 | As often as other peers in Ophthalmology |
| Established patient complete exam of visual system | Treatment | 92014 |
340 | As often as other peers in Ophthalmology |
| Photography of the retina | Treatment | 92250 |
208 | More often than most peers in Ophthalmology |
| Measurement of corneal curvature and depth of eye | Treatment | 92136 |
137 | As often as other peers in Ophthalmology |
| Established patient problem focused exam of visual system | Treatment | 92012 |
91 | As often as other peers in Ophthalmology |
| Exam of visual field with extended testing | Treatment | 92083 |
48 | Less often than most peers in Ophthalmology |
| New patient complete exam of visual system | Treatment | 92004 |
41 | As often as other peers in Ophthalmology |
| Imaging of optic nerve | Treatment | 92133 |
39 | Less often than most peers in Ophthalmology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other eye doctors at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 30 related providers in 4 groups
Other eye doctors in San Mateo 6
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1982 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of cataract with insertion of prosthetic lens 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Drinnan?
Dr. Drinnan is an eye doctor in San Mateo, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Ophthalmology”.
NPI registry
What is Dr. Drinnan's address?
Dr. Drinnan is listed at 101 S San Mateo Dr Suite 310, San Mateo, CA 94401. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Drinnan?
The number on file is (650) 342-7474. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Drinnan's NPI number?
Dr. Drinnan's National Provider Identifier is 1609883024. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Drinnan train?
Dr. Drinnan attended Other, graduating in 1982. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Drinnan been practicing?
Dr. Drinnan has 44 years experience. Calculated from a graduation year of 1982, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Drinnan perform?
According to Medicare billing data, Dr. Drinnan performs procedures including removal of cataract with insertion of prosthetic lens, removal of recurring cataract in lens capsule using a laser and complex removal of cataract with insertion of prosthetic lens; provides treatments such as established patient complete exam of visual system and photography of the retina, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Drinnan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Drinnan. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.