Keiko Greenberg
NPI 1588807408 · Nephrology Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Keiko Greenberg is a Nephrology Physician provider in Baltimore, MD (NPI 1588807408).
Provider details
- NPI number
- 1588807408
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- D0079185 (MD)
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
17 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
1,152 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 616 | $89 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 166 | $148 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 95 | $135 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 53 | $196 |
| Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)90961 | 49 | $353 |
| Home Dialysis Services Per Month (20 Years Or Older)90966 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 45 | 17 |
| Carvedilol | 37 | 17 |
| Empagliflozinbrand: Jardiance | 26 | — |
| Nifedipinebrand: Nifedipine Er | 26 | — |
| Atorvastatin Calcium | 25 | 13 |
| Losartan Potassium | 25 | — |
| Furosemide | 23 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$89 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
- 2009-04-07
- Last updated
- 2016-01-01
Frequently asked questions
- What is Keiko Greenberg's NPI number?
- Keiko Greenberg's National Provider Identifier (NPI) is 1588807408, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Keiko Greenberg's specialty?
- Keiko Greenberg is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Keiko Greenberg located?
- Keiko Greenberg's practice location on file with NPPES is 1830 E Monument St Ste 416, Baltimore, MD 21287-0020.
- What is Keiko Greenberg's phone number?
- The practice phone number listed in the NPPES registry for Keiko Greenberg is (410) 955-5268.
- Does Keiko Greenberg accept Medicare?
- Keiko Greenberg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Keiko Greenberg's NPI active?
- Yes — Keiko Greenberg's NPI (1588807408) is active in the NPPES registry as of the last update on 2016-01-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.