Mathew Greenberg, MD
NPI 1083819551 · Anatomic Pathology & Clinical Pathology Physician · Portland, OR
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mathew Greenberg, MD is a Anatomic Pathology & Clinical Pathology Physician provider in Portland, OR (NPI 1083819551).
Provider details
- NPI number
- 1083819551
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD27976 (OR)
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
1,125 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) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 299 | $37 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 277 | $28 |
| Microscopic Genetic Analysis of Tumor, Manual88360 | 132 | $41 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 123 | $35 |
| Evaluation of Fine Needle Aspirate With Interpretation and Report88173 | 90 | $70 |
| Cell Examination of Specimen, Selective Cellular Enhancement Technique88112 | 84 | $28 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$35 across 1 record (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
- 2007-06-15
- Last updated
- 2019-09-25
Frequently asked questions
- What is Mathew Greenberg's NPI number?
- Mathew Greenberg's National Provider Identifier (NPI) is 1083819551, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mathew Greenberg's specialty?
- Mathew Greenberg is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Mathew Greenberg located?
- Mathew Greenberg's practice location on file with NPPES is 4400 Ne Halsey St, Portland, OR 97213-1545.
- What is Mathew Greenberg's phone number?
- The practice phone number listed in the NPPES registry for Mathew Greenberg is (503) 893-7757.
- Does Mathew Greenberg accept Medicare?
- Mathew Greenberg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mathew Greenberg's NPI active?
- Yes — Mathew Greenberg's NPI (1083819551) is active in the NPPES registry as of the last update on 2019-09-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.