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Edit this profileAt a glance
- 3162 Campus Dr, San Mateo, CA 94403
About Dr. Collom
Karen S. Collom, OD is an optometrist practicing in San Mateo, CA. Karen trained at University of California - School of Optometry, graduating in 1993. Medicare claims data shows Karen provided 162 services to 157 patients. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, imaging of optic nerve, and exam of visual field with extended testing. This provider record is associated with NPI 1104887629.
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) 345-0248
- Email not available
Practice Locations
3162 CAMPUS DR
San Mateo, CA 94403
Conditions Commonly Evaluated or Treated
Within Optometry 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
Most searched conditions
Contact lens issues
Cornea conditions
Corneal issues
Eye conditions
Eye discomfort
Eye diseases
Eye infections
Eye inflammation
Eye injuries
Eye irritation
Eye surface issues
Eyelid conditions
Eyelid issues
Pediatric eye conditions
Pupil issues
Tear duct issues
Vision changes
- Blurry Vision
- Color Blindness
- Distorted Vision
- Double Vision
- Eye Floaters and Flashes
- Eye Strain
- Farsightedness
- Halos Around Lights
- Light Sensitivity
- Night Blindness
- Posterior vitreous detachment
- Tunnel Vision
- Visual Migraines
Procedures & services
Most searched procedures
Contact lens exams
- Bifocal or Multifocal Contact Lens Fitting
- Contact Lens Training
- Plano (Non-Prescription) Colored Contact Lens Exam
- Toric Contact Lens Fitting
Dry eye treatments
Examinations
- Comprehensive medical eye examination
- Diabetic Eye Exam
- DMV Vision Test
- Low Vision Assessment
- Pediatric Eye Exam
Eyelid care
Eyelid treatments
General exams
Glasses and eyewear
- Blue Light Glasses Consultation
- Eyeglass Frame Adjustment and Repair
- Prescription Sunglasses Consultation
- Prism Eyeglasses Fitting
Imaging & tests
- Color Vision Testing
- Corneal topography
- Coronary optical coherence tomography
- Eye-pressure measurement
- Pachymetry
- Retinal photography
- Visual Field Test
Imaging and scans
Minor procedures
Specialty lenses
Surgical evaluations
Tear duct procedures
Therapy
Urgent care
Vision correction
Procedures Most Often Billed to Medicare
162 services · 157 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Imaging of optic nerve | Treatment | 92133 |
30 | As often as other peers in Optometrist |
| Exam of visual field with extended testing | Treatment | 92083 |
28 | As often as other peers in Optometrist |
| Imaging of retina | Treatment | 92134 |
19 | Less often than most peers in Optometrist |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
74 | As often as other peers in Optometrist |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
11 | Less often than most peers in Optometrist |
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 optometrists in San Mateo 8
Same specialty, same city.
Trained at University of California - School of Optometry 8
Other providers in the same specialty who trained at the same institution.
Class of 1993 at University of California - School of Optometry 7
Providers who graduated from the same medical school in the same year.
More connections — 8 related providers in 1 group
Also performs Imaging of optic nerve 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. Collom specialize in?
Dr. Collom is an optometrist in San Mateo, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Dr. Collom located?
Dr. Collom is listed at 3162 Campus Dr, San Mateo, CA 94403. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Collom's phone number?
The number on file is (650) 345-0248. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Collom?
Dr. Collom's National Provider Identifier is 1104887629. 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. Collom go to medical school?
Dr. Collom attended University of California - School of Optometry, graduating in 1993. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Collom have?
Dr. Collom has 33 years experience. Calculated from a graduation year of 1993, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Collom do most often?
According to Medicare billing data, Dr. Collom provides treatments such as imaging of optic nerve and exam of visual field with extended testing, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Collom's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Collom. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.