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Edit this profileAt a glance
- 2080 Century Park E Ste 1410, Los Angeles, CA 90067
About Dr. Ahn
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 specializing in internal medicine and endocrinology, diabetes & metabolism. According to Medicare claims data, Thomas cared for 6,111 Medicare patients across 9,201 services. The services billed most often include insertion of needle into vein for collection of blood sample, blood test, thyroid stimulating hormone (tsh), and blood test, lipids (cholesterol and triglycerides). NPI 1669556866 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
- (310) 277-7600
- Email not available
Practice Locations
2080 CENTURY PARK E STE 1410
Los Angeles, CA 90067
Conditions Commonly Evaluated or Treated
Within Endocrinology, Diabetes and Metabolism 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
Adrenal
Adrenal disorders
Blood sugar disorders
Bone and calcium disorders
Bones
Diabetes
Endocrine tumors
Hormone disorders
- Early or delayed puberty
- Excess facial or body hair
- Gynecomastia
- Perimenopause
- Testosterone deficiency
Hormones
Metabolic disorders
Metabolism
Parathyroid
Pituitary
Pituitary disorders
Thyroid
Thyroid disorders
Procedures & services
Most searched procedures
Adrenal
Adrenal evaluations
Blood sugar management
Bone evaluations
Bone treatments
Diabetes
- Automated Insulin System Setup
- Blood Ketone Monitoring
- C-Peptide Test
- Continuous Glucose Monitor Data Review
- Medical nutrition therapy
- Starting Insulin Therapy
Diabetes education
Diabetes preventive care
Genetic evaluations
Hormone treatments
- Estrogen and Progesterone Therapy
- Growth Hormone Injections
- Hormone Replacement Therapy Consultation
Hormones
Metabolic evaluations
Metabolism
Parathyroid
Pituitary
Pituitary evaluations
Thyroid
Thyroid procedures
- Radioactive Iodine Treatment
- Thyroid Antibody Testing
- Thyroid Blood Test
- Thyroid Medication Adjustment
- Thyroid Nodule Biopsy
- Thyroid Nodule Radiofrequency Ablation
Weight & Metabolism
Procedures Most Often Billed to Medicare
9,201 services · 6,111 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
673 | More than most peers in Endocrinology |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
212 | More than most peers in Endocrinology |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
116 | More often than most peers in Endocrinology |
| Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | Treatment | 95251 |
46 | As often as other peers in Endocrinology |
| Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg | Drug given | J3420 |
64 | As often as other peers in Endocrinology |
| Blood test, thyroid stimulating hormone (tsh) | Lab test | 84443 |
575 | More than most peers in Endocrinology |
| Blood test, lipids (cholesterol and triglycerides) | Lab test | 80061 |
556 | More than most peers in Endocrinology |
| Uric acid level, blood | Lab test | 84550 |
547 | More than most peers in Endocrinology |
| Thyroxine (thyroid chemical), free | Lab test | 84439 |
546 | More than most peers in Endocrinology |
| Lactate dehydrogenase (enzyme) level | Lab test | 83615 |
544 | More often than most peers in Endocrinology |
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.
Common questions
What does Dr. Ahn specialize in?
Dr. Ahn is an endocrinology in Los Angeles, CA. That is the designation recorded for this NPI in the federal registry.
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. Contact the office directly to confirm availability and scheduling.
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 practicing?
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.
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