Physician Profile
Unclaimed ProfileAbout ZEROOGIAN
John M. Zeroogian, M.D. practices gastroenterology in Pasadena, CA. According to Medicare claims data, John cared for 521 Medicare patients across 1,202 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
- (626) 449-9920
- Email not available
Practice Locations
630 S RAYMOND AVE UNIT 240
Pasadena, CA 91105
Procedures Most Often Billed to Medicare
1,202 services · 521 patients · 11 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
126 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
52 |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
21 |
| Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month | Office visit | 99439 |
478 |
| Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | Office visit | 99490 |
268 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
98 |
| Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monit | Billing code | G0500 |
55 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
31 |
| Colorectal cancer screening; colonoscopy on individual at high risk | Billing code | G0105 |
29 |
| Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | Billing code | G0121 |
22 |
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 gastroenterology specialists at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 5
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 — 30 related providers in 4 groups
Other gastroenterology specialists in Pasadena 6
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1989 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of polyps or growths of large bowel using an endoscope with mechanical snare 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Dr. Zeroogian's specialty?
Dr. Zeroogian is a gastroenterology in Pasadena, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
Where can I find Dr. Zeroogian?
Dr. Zeroogian is listed at 630 S RAYMOND AVE UNIT 240, Pasadena, CA 91105. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Zeroogian?
The number on file is (626) 449-9920. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Zeroogian's NPI number?
Dr. Zeroogian's National Provider Identifier is 1437149226. 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
What is Dr. Zeroogian's medical education?
Dr. Zeroogian attended Other, graduating in 1989. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Zeroogian been practicing?
Dr. Zeroogian has 37 years experience. Calculated from a graduation year of 1989, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Zeroogian known for?
According to Medicare billing data, Dr. Zeroogian performs procedures including removal of polyps or growths of large bowel using an endoscope with mechanical snare, biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope and biopsy of large bowel using a flexible endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Zeroogian confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Zeroogian. If this is you, claiming it is free.
Guide.md
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.