Physician Profile
Marianne H. Cowley, MD
Unclaimed ProfileAbout Dr. Cowley
Based in Baltimore, MD, Marianne H. Cowley, MD is listed in the NPI registry under ophthalmology. According to Medicare claims data, Marianne cared for 827 Medicare patients across 1,421 services. The services billed most often include imaging of retina, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and injection, aflibercept, 1 mg. NPI 1811964448 identifies this record in the national registry.
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
- (410) 955-5000
- Email not available
Practice Locations
600 N WOLFE ST
Baltimore, MD 21287
3103 Breckenridge Ln Ste 2
Louisville, KY 40220
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
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
Inflammation, neurologic, and orbit
Retina & vitreous
Procedures & services
Most searched procedures
Examination and imaging
Cataract and lens
Corneal procedures
Eye diagnostics
Eye injuries
Eyelid surgery
Eyelid, tear duct, and muscle
Glaucoma
- Glaucoma drainage-device implantation
- Laser peripheral iridotomy
- Minimally invasive glaucoma surgery
- Selective laser trabeculoplasty
Laser eye surgery
Laser procedures
Laser vision correction
Refractive surgery
Tear duct & Orbit
Procedures Most Often Billed to Medicare
1,421 services · 827 patients · 12 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Injection of drug into eye | Procedure | 67028 |
187 | As often as other peers in Ophthalmology |
| Imaging of retina | Treatment | 92134 |
459 | More often than most peers in Ophthalmology |
| Established patient complete exam of visual system | Treatment | 92014 |
149 | As often as other peers in Ophthalmology |
| New patient complete exam of visual system | Treatment | 92004 |
54 | As often as other peers in Ophthalmology |
| Photography of the retina | Treatment | 92250 |
25 | Less often than most peers in Ophthalmology |
| Exam of retinal blood vessels using a special camera after injection of a dye | Treatment | 92235 |
14 | Less often than most peers in Ophthalmology |
| Injection, aflibercept, 1 mg | Drug given | J0178 |
198 | Less often than most peers in Ophthalmology |
| Compounded drug, not otherwise classified | Drug given | J7999 |
65 | As often as other peers in Ophthalmology |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
222 | More often than most peers in Ophthalmology |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
18 | As often as other 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 1
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 — 31 related providers in 4 groups
Other eye doctors in Baltimore 7
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 Injection of drug into eye 8
Providers in MD who bill this service to Medicare most often.
Common questions
What does Dr. Cowley specialize in?
Dr. Cowley is an eye doctor in Baltimore, MD. That is the designation recorded for this NPI in the federal registry, where it is listed as “Ophthalmology”.
NPI registry
Where is Dr. Cowley located?
Dr. Cowley is listed at 600 N Wolfe St, Baltimore, MD 21287. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Cowley's phone number?
The number on file is (410) 955-5000. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Cowley's NPI number?
Dr. Cowley's National Provider Identifier is 1811964448. 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. Cowley go to medical school?
Dr. Cowley attended Other, graduating in 1982. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Cowley been practicing?
Dr. Cowley has 44 years experience. Calculated from a graduation year of 1982, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Cowley do most often?
According to Medicare billing data, Dr. Cowley performs procedures including injection of drug into eye; provides treatments such as imaging of retina and established patient complete exam of visual system, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Cowley confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Cowley. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.