Physician Profile
Unclaimed ProfileAbout KATZ
Based in Newport Beach, CA, Gregory Katz, MD is listed in the NPI registry under internal medicine. Gregory graduated from Albert Einstein College of Medicine of Yeshiva University in 1991. According to Medicare claims data, Gregory cared for 1,153 Medicare patients across 1,595 services.
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
- (949) 642-2333
- Email not available
Practice Locations
520 SUPERIOR AVE STE 220
Newport Beach, CA 92663
Procedures Most Often Billed to Medicare
1,595 services · 1,153 patients · 13 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
112 |
| Influenza vaccine, inactivated | Treatment | 90653 |
76 |
| Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | Treatment | 90677 |
43 |
| Administration of psychological or neuropsychological test, first 30 minutes | Treatment | 96136 |
17 |
| Evaluation of neuropsychological test, first hour | Treatment | 96132 |
17 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
867 |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
239 |
| Administration of influenza virus vaccine | Billing code | G0008 |
84 |
| Administration of pneumococcal vaccine | Billing code | G0009 |
43 |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
34 |
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 4
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 — 31 related providers in 4 groups
Other internal medicines in Newport Beach 7
Same specialty, same city.
Trained at Albert Einstein College of Medicine of Yeshiva University 8
Other providers in the same specialty who trained at the same institution.
Class of 1991 at Albert Einstein College of Medicine of Yeshiva University 8
Providers who graduated from the same medical school in the same year.
Also performs Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Katz?
Dr. Katz is an internal medicine in Newport Beach, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
What is Dr. Katz's address?
Dr. Katz is listed at 520 SUPERIOR AVE STE 220, Newport Beach, CA 92663. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Katz?
The number on file is (949) 642-2333. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Katz's NPI number?
Dr. Katz's National Provider Identifier is 1184674178. 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. Katz train?
Dr. Katz attended Albert Einstein College of Medicine of Yeshiva University, graduating in 1991. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Katz been practicing?
Dr. Katz has 35 years experience. Calculated from a graduation year of 1991, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Katz perform?
According to Medicare billing data, Dr. Katz provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report and influenza vaccine, inactivated, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Katz confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Katz. 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.