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Edit this profileAt a glance
- 2552 Walnut Ave, Suite 130, Tustin, CA 92780
About Dr. Oh
Charles K. Oh, M.D. is a specialist practicing in Tustin, CA. Charles trained at Wayne State University School of Medicine, graduating in 1996. According to Medicare claims data, Charles cared for 2,100 Medicare patients across 3,117 services. The services billed most often include test for allergy using allergenic extract, removal of impacted ear wax, and established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more. This provider record is associated with NPI 1780689042.
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
- (714) 508-1600
- Email not available
Practice Locations
2552 WALNUT AVE SUITE 130
Tustin, CA 92780
Procedures Most Often Billed to Medicare
3,117 services · 2,100 patients · 22 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of impacted ear wax | Procedure | 69210 |
499 | More than most peers in Specialist |
| Diagnostic exam of nasal passages using an endoscope | Procedure | 31231 |
159 | More often than most peers in Specialist |
| Diagnostic exam of voice box using a flexible endoscope | Procedure | 31575 |
107 | More often than most peers in Specialist |
| Destruction of soft tissue of nasal passages | Procedure | 30801 |
29 | Too few peers to compare |
| Biopsy or removal of nasal polyp or tissue using an endoscope | Procedure | 31237 |
24 | Less often than most peers in Specialist |
| Removal or destruction of growth of nose through nose | Procedure | 30117 |
24 | Too few peers to compare |
| Repair of collapsed nasal valve | Procedure | 30469 |
20 | Too few peers to compare |
| Ct scan of face without contrast | Imaging | 70486 |
19 | Less often than most peers in Specialist |
| Test for allergy using allergenic extract | Treatment | 95004 |
528 | Less often than most peers in Specialist |
| Comprehensive hearing and speech recognition test | Treatment | 92557 |
152 | More often than most peers in Specialist |
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.
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.
Other specialists in Tustin 6
Same specialty, same city.
Trained at Wayne State University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 1996 at Wayne State University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of impacted ear wax 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Charles K. Oh's specialty?
Charles K. Oh is a specialist in Tustin, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Charles K. Oh?
Charles K. Oh is listed at 2552 Walnut Ave Suite 130, Tustin, CA 92780. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Charles K. Oh?
The number on file is (714) 508-1600. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Charles K. Oh's NPI number?
Charles K. Oh's National Provider Identifier is 1780689042. 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
What is Charles K. Oh's education?
Charles K. Oh attended Wayne State University School of Medicine, graduating in 1996. This comes from the CMS National Downloadable File.
CMS public data
How long has Charles K. Oh been practicing?
Charles K. Oh has 30 years experience. Calculated from a graduation year of 1996, reported in the CMS National Downloadable File.
CMS public data
What is Charles K. Oh known for?
According to Medicare billing data, Charles K. Oh performs procedures including removal of impacted ear wax, diagnostic exam of nasal passages using an endoscope and diagnostic exam of voice box using a flexible endoscope; reads or performs imaging such as ct scan of face without contrast; provides treatments such as test for allergy using allergenic extract and comprehensive hearing and speech recognition test, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Charles K. Oh confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Charles K. Oh. If this is you, claiming it is free.
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