Physician Profile
Unclaimed ProfileAbout SIEW
Melissa Siew, M.D. is a healthcare provider in Westminster, CA specializing in internal medicine. Medicare claims data shows Melissa provided 4,375 services to 977 patients.
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
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (714) 379-3221
- Email not available
Practice Locations
7955 WESTMINSTER BLVD
Westminster, CA 92683
Procedures Most Often Billed to Medicare
4,375 services · 977 patients · 12 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes | Office visit | 99348 |
1,519 |
| Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | Office visit | 99309 |
968 |
| Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes | Office visit | 99349 |
607 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
455 |
| Advance care planning, first 30 minutes | Office visit | 99497 |
176 |
| Physician or allowed practitioner supervision of a patient receiving medicare-covered services provided by a participating home health agency (patient not present) requiring complex and multidisciplinary care modalities involving regular physician or allo | Billing code | G0181 |
161 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
154 |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
153 |
| Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more | Office visit | 99306 |
91 |
| Nursing facility discharge management, more than 30 minutes | Office visit | 99316 |
39 |
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.
Other internal medicines at this location 3
Same specialty, same street address — most likely the same department or group.
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.
More connections — 24 related providers in 3 groups
Other internal medicines in Westminster 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2012 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Siew specialize in?
Dr. Siew is an internal medicine in Westminster, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
Where is Dr. Siew located?
Dr. Siew is listed at 7955 WESTMINSTER BLVD, Westminster, CA 92683. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Siew's phone number?
The number on file is (714) 379-3221. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Siew?
Dr. Siew's National Provider Identifier is 1780096099. 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. Siew go to medical school?
Dr. Siew attended Other, graduating in 2012. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Siew have?
Dr. Siew has 14 years experience. Calculated from a graduation year of 2012, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Siew do most often?
According to Medicare billing data, Dr. Siew 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
Is Dr. Siew's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Siew. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.