Dr. Charles Oh, M.D.
What this data tells you about Dr. Oh
Dr. Charles Oh is an optician specialist in Tustin, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Oh performed 2,998 Medicare services across 2,036 unique beneficiaries.
Between the years covered by Open Payments, Dr. Oh received a total of $4,768 from 18 pharmaceutical and/or device companies across 170 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in optician. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Oh is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
Medicare Practice Summary
Medicare Utilization ↗Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
527 | $73 | $150 |
| Ear wax removal A procedure to remove impacted ear wax from the ear canal. |
465 | $37 | $90 |
| Allergy skin test A diagnostic test performed to identify specific allergies by applying or introducing allergenic extracts to the body. The procedure measures the patient's immune response to various potential allergens. |
464 | $4 | $15 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
308 | $105 | $215 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
207 | $133 | $275 |
| Comprehensive hearing and speech recognition test A diagnostic evaluation that assesses hearing ability and the capacity to understand spoken words. The test measures how well a patient can detect sounds and recognize speech. |
177 | $30 | $105 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
160 | $84 | $185 |
| Middle ear function test A diagnostic test used to evaluate how well the middle ear is functioning. |
126 | $14 | $30 |
| Nasal endoscopy A diagnostic procedure that uses a thin, lighted tube to examine the inside of the nasal passages. |
124 | $171 | $350 |
| Flexible laryngoscopy A diagnostic exam of the voice box using a flexible endoscope to visualize the larynx. |
120 | $116 | $225 |
| Microscopic ear examination A detailed visual inspection of the ear using a specialized microscope to examine the ear canal and eardrum. |
80 | $27 | $55 |
| Office visit, established patient (10-19 min) An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition. |
62 | $49 | $96 |
| Eardrum and muscle function test A diagnostic test used to evaluate the function of the eardrum and associated muscles. |
52 | $16 | $35 |
| Nasal growth removal or destruction This procedure involves the removal or destruction of a growth located in the nose using an approach through the nostrils. |
33 | $648 | $1,590 |
| New patient office visit, 15-29 minutes An initial office visit for a new patient lasting 15 to 29 minutes. This code is used when the total time spent on the date of the encounter meets this duration threshold. |
24 | $53 | $130 |
| Destruction of nasal passage soft tissue A procedure to destroy abnormal or excess soft tissue within the nasal passages. |
23 | $107 | $415 |
| Head repositioning exercises for dizziness A series of exercises performed to reposition the head, used to treat dizziness. The procedure is administered on a daily basis. |
18 | $37 | $70 |
| Impacted earwax removal by physician Removal of impacted earwax from one or both ears by a physician on the same day as audiologic testing. |
17 | $45 | $90 |
| Nasal and throat exam with endoscope A procedure to visually examine the nose and throat using a thin, flexible tube with a camera. This allows for direct visualization of the internal structures of the upper airway. |
11 | $109 | $260 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
All-time payments by company (2018-2024) ›
Associated products mentioned in payments ›
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Oh is a clinical cardiology specialist, with above-average Medicare volume (top 28% in CA), with low-engagement industry engagement, with 20 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
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All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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