Nathan Kam, M.D.
NPI 1598843351 · Gastroenterology Physician · San Leandro, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathan Kam, M.D. is a Gastroenterology Physician provider in San Leandro, CA (NPI 1598843351).
Provider details
- NPI number
- 1598843351
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G69248 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
805 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 227 | $96 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 98 | $170 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 92 | $79 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 84 | $143 |
| 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 MonitoG0500 | 78 | $5 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 195 | 88 |
| Famotidine | 163 | 69 |
| Pantoprazole Sodium | 135 | 60 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 127 | 123 |
| Ondansetron Hcl | 106 | 94 |
| Ondansetronbrand: Ondansetron Odt | 82 | 81 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes | 67 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$145 across 2 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
- 2006-11-01
- Last updated
- 2015-06-30
Frequently asked questions
- What is Nathan Kam's NPI number?
- Nathan Kam's National Provider Identifier (NPI) is 1598843351, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Kam's specialty?
- Nathan Kam is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Nathan Kam located?
- Nathan Kam's practice location on file with NPPES is 2500 Merced Street, San Leandro, CA 94577-4201.
- What is Nathan Kam's phone number?
- The practice phone number listed in the NPPES registry for Nathan Kam is (510) 454-1000.
- Does Nathan Kam accept Medicare?
- Nathan Kam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathan Kam's NPI active?
- Yes — Nathan Kam's NPI (1598843351) is active in the NPPES registry as of the last update on 2015-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.