Physician Profile
Unclaimed ProfileAbout LAM
Gregory Jason Lam, M.D. is a healthcare provider in Laguna Hills, CA specialising in internal medicine. Gregory trained at University of California, San Francisco School of Medicine, graduating in 2016.
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. Lam specialise in?
Dr. Lam is an internal medicine in Laguna Hills, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
Where is Dr. Lam located?
Dr. Lam is listed at 23961 CALLE DE LA MAGDALENA STE 200, Laguna Hills, CA 92653. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Lam's phone number?
The number on file is (949) 238-4100. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Lam's NPI number?
Dr. Lam's National Provider Identifier is 1871955922. 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. Lam go to medical school?
Dr. Lam attended University of California, San Francisco School of Medicine, graduating in 2016. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Lam been practising?
Dr. Lam has 10 years experience. Calculated from a graduation year of 2016, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Lam do most often?
According to Medicare billing data, Dr. Lam the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Lam confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Lam. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (949) 238-4100
- Email not available
Practice Locations
23961 CALLE DE LA MAGDALENA STE 200
Laguna Hills, CA 92653
Procedures Most Often Billed to Medicare
146 services · 123 patients · 4 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
91 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
28 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
15 |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
12 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internal medicines at this location 1
Same specialty, same street address — most likely the same department or group.
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 internal medicines in Laguna Hills 7
Same specialty, same city.
More connections — 16 related providers in 2 groups
Trained at University of California, San Francisco School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2016 at University of California, San Francisco School of Medicine 8
Providers who graduated from the same medical school in the same year.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.