Karl Gaal, MD
NPI 1710943543 · Hematology (Pathology) Physician · Duarte, CA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karl Gaal, MD is a Hematology (Pathology) Physician provider in Duarte, CA (NPI 1710943543).
Provider details
- NPI number
- 1710943543
- Entity type
- Individual
- Primary specialty
- Hematology (Pathology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A60183 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
3,976 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 1,020 | $30 |
| Protein Measurement, Serum84165 | 617 | $19 |
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 426 | $39 |
| Immunologic Analysis Technique on Serum (immunofixation)86334 | 302 | $19 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 235 | $37 |
| Flow Cytometry Technique for Dna Or Cell Analysis, 16 Or More Markers88189 | 229 | $88 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-21
- Last updated
- 2020-12-14
- Certified
- 2020-12-14
Frequently asked questions
- What is Karl Gaal's NPI number?
- Karl Gaal's National Provider Identifier (NPI) is 1710943543, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karl Gaal's specialty?
- Karl Gaal is listed in the NPPES registry with a primary specialty of Hematology (Pathology) Physician (Allopathic & Osteopathic Physicians).
- Where is Karl Gaal located?
- Karl Gaal's practice location on file with NPPES is 1500 E Duarte Rd, Duarte, CA 91010.
- What is Karl Gaal's phone number?
- The practice phone number listed in the NPPES registry for Karl Gaal is (626) 359-8111.
- Does Karl Gaal accept Medicare?
- Karl Gaal is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karl Gaal's NPI active?
- Yes — Karl Gaal's NPI (1710943543) is active in the NPPES registry as of the last update on 2020-12-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.