Physician Profile
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Based in Los Angeles, CA, Thomas G Ahn, MD is listed in the NPI registry under endocrinology. Thomas graduated from Virginia Commonwealth University, School of Medicine in 1979. Thomas is also listed as specialising in internal medicine and endocrinology, diabetes & metabolism.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. Ahn specialise in?
Dr. Ahn is an endocrinology in Los Angeles, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “ENDOCRINOLOGY”.
NPI registry
Where is Dr. Ahn located?
Dr. Ahn is listed at 2080 CENTURY PARK E STE 1410, Los Angeles, CA 90067. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Ahn's phone number?
The number on file is (310) 277-7600. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Ahn's NPI number?
Dr. Ahn's National Provider Identifier is 1669556866. 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. Ahn go to medical school?
Dr. Ahn attended Virginia Commonwealth University, School of Medicine, graduating in 1979. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Ahn been practising?
Dr. Ahn has 47 years experience. Calculated from a graduation year of 1979, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Ahn do most often?
According to Medicare billing data, Dr. Ahn performs procedures including insertion of needle into vein for collection of blood sample; provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report and injection of drug or substance under skin or into muscle, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Ahn confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Ahn. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (310) 277-7600
- Email not available
Practice Locations
2080 CENTURY PARK E STE 1410
Los Angeles, CA 90067
Procedures Most Often Billed to Medicare
9,201 services · 6,111 patients · 25 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
673 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
212 |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
116 |
| Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | Treatment | 95251 |
46 |
| Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg | Drug given | J3420 |
64 |
| Blood test, thyroid stimulating hormone (tsh) | Lab test | 84443 |
575 |
| Blood test, lipids (cholesterol and triglycerides) | Lab test | 80061 |
556 |
| Uric acid level, blood | Lab test | 84550 |
547 |
| Thyroxine (thyroid chemical), free | Lab test | 84439 |
546 |
| Lactate dehydrogenase (enzyme) level | Lab test | 83615 |
544 |
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.
Related specialists at this location 8
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.
Other endocrinology specialists in Los Angeles 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Virginia Commonwealth University, School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1979 at Virginia Commonwealth University, School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in CA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.