Jay Guan, M.D.
NPI 1295122497 · Gastroenterology Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jay Guan, M.D. is a Gastroenterology Physician provider in Los Angeles, CA (NPI 1295122497).
Provider details
- NPI number
- 1295122497
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,952 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Chronic Care Management Services for Two Or More Chronic Conditions, Additional 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99439 | 1,280 | $51 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 735 | $66 |
| 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'SG2211 | 620 | $17 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 564 | $135 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 229 | $32 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 42 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 309 | 124 |
| Pantoprazole Sodium | 179 | 58 |
| Linaclotidebrand: Linzess | 98 | 30 |
| Mirtazapine | 68 | 23 |
| Rabeprazole Sodium | 55 | 20 |
| Colesevelam Hcl | 49 | 21 |
| Carvedilol | 48 | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,787 across 130 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-04-25
- Last updated
- 2018-04-09
Frequently asked questions
- What is Jay Guan's NPI number?
- Jay Guan's National Provider Identifier (NPI) is 1295122497, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jay Guan's specialty?
- Jay Guan is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Jay Guan located?
- Jay Guan's practice location on file with NPPES is 1200 N State Street, Ct-A7d, Los Angeles, CA 90033-1106.
- What is Jay Guan's phone number?
- The practice phone number listed in the NPPES registry for Jay Guan is (323) 226-7556.
- Does Jay Guan accept Medicare?
- Jay Guan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jay Guan's NPI active?
- Yes — Jay Guan's NPI (1295122497) is active in the NPPES registry as of the last update on 2018-04-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.