Isaac Raijman, MD
NPI 1689679557 · Gastroenterology Physician · Houston, TX
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Isaac Raijman, MD is a Gastroenterology Physician provider in Houston, TX (NPI 1689679557).
Provider details
- NPI number
- 1689679557
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- H7210 (TX)
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
21 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
1,256 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 | 165 | $127 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 102 | $106 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 92 | $117 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 90 | $167 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 90 | $63 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 223 | 80 |
| Famotidine | 115 | 30 |
| Dicyclomine Hcl | 69 | 34 |
| Sod Picosulf/Mag Ox/Citric Acbrand: Clenpiq | 65 | 63 |
| Peg3350/Sod Sul/Nacl/Kcl/Asb/Cbrand: Plenvu | 58 | 54 |
| Lipase/Protease/Amylasebrand: Creon | 52 | 14 |
| Omeprazole | 42 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$23,744 across 159 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
- 2005-06-16
- Last updated
- 2016-04-12
Frequently asked questions
- What is Isaac Raijman's NPI number?
- Isaac Raijman's National Provider Identifier (NPI) is 1689679557, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Isaac Raijman's specialty?
- Isaac Raijman is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Isaac Raijman located?
- Isaac Raijman's practice location on file with NPPES is 4100 S Shepherd Dr, Houston, TX 77098-5316.
- What is Isaac Raijman's phone number?
- The practice phone number listed in the NPPES registry for Isaac Raijman is (713) 795-4444.
- Does Isaac Raijman accept Medicare?
- Isaac Raijman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Isaac Raijman's NPI active?
- Yes — Isaac Raijman's NPI (1689679557) is active in the NPPES registry as of the last update on 2016-04-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.