Gabriel Waterman, MD, MBA
NPI 1639556434 · Internal Medicine Physician · Long Beach, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gabriel Waterman, MD, MBA is a Internal Medicine Physician provider in Long Beach, CA (NPI 1639556434).
Provider details
- NPI number
- 1639556434
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, MBA
- Sex
- Male
- Sole proprietor
- No
- License
- A144802 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
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 |
|---|---|---|
| Furosemide | 43 | 17 |
| Escitalopram Oxalate | 36 | — |
| Losartan Potassium | 28 | — |
| Atorvastatin Calcium | 27 | 13 |
| Risperidone | 23 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 23 | 11 |
| Levothyroxine Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-04-30
- Last updated
- 2025-10-08
- Certified
- 2025-10-08
Frequently asked questions
- What is Gabriel Waterman's NPI number?
- Gabriel Waterman's National Provider Identifier (NPI) is 1639556434, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gabriel Waterman's specialty?
- Gabriel Waterman is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gabriel Waterman located?
- Gabriel Waterman's practice location on file with NPPES is 3800 Kilroy Airport Way Ste 100, Long Beach, CA 90806-6818.
- What is Gabriel Waterman's phone number?
- The practice phone number listed in the NPPES registry for Gabriel Waterman is (888) 828-7226.
- Does Gabriel Waterman accept Medicare?
- Gabriel Waterman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gabriel Waterman's NPI active?
- Yes — Gabriel Waterman's NPI (1639556434) is active in the NPPES registry as of the last update on 2025-10-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.