Brian Greenberg, M.D.
NPI 1609074723 · Rheumatology Physician · Portland, OR
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brian Greenberg, M.D. is a Rheumatology Physician provider in Portland, OR (NPI 1609074723).
Provider details
- NPI number
- 1609074723
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A98940 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methotrexate Sodiumbrand: Methotrexate | 766 | 241 |
| Prednisone | 594 | 219 |
| Hydroxychloroquine Sulfate | 255 | 93 |
| Leflunomide | 204 | 76 |
| Adalimumab-Attobrand: Amjevita(cf) Autoinjector | 199 | 38 |
| Allopurinol | 138 | 33 |
| Etanerceptbrand: Enbrel Sureclick |
Practice location
Mailing address
Additional practice locations (1)
- 136 Sherman AveSuite 104New Haven, CT 06511-5238Phone: (203) 785-0885Fax: (203) 624-9714
Registry dates
- Enumerated
- 2007-07-10
- Last updated
- 2026-02-16
- Certified
- 2026-02-16
Frequently asked questions
- What is Brian Greenberg's NPI number?
- Brian Greenberg's National Provider Identifier (NPI) is 1609074723, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian Greenberg's specialty?
- Brian Greenberg is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Brian Greenberg located?
- Brian Greenberg's practice location on file with NPPES is 3550 N Interstate Ave, Portland, OR 97227-1196.
- What is Brian Greenberg's phone number?
- The practice phone number listed in the NPPES registry for Brian Greenberg is (800) 813-2000.
- Does Brian Greenberg accept Medicare?
- Brian Greenberg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brian Greenberg's NPI active?
- Yes — Brian Greenberg's NPI (1609074723) is active in the NPPES registry as of the last update on 2026-02-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.