Earl Nielsen, MD
NPI 1770550030 · Nephrology Physician · Morristown, NJ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Earl Nielsen, MD is a Nephrology Physician provider in Morristown, NJ (NPI 1770550030).
Provider details
- NPI number
- 1770550030
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MA026976 (NJ)
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
20 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
264 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 155 | $97 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 66 | $138 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 30 | $16 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 13 | $138 |
Typical Medicare-allowed amounts for these services range $16–$138 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 47 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 105 | 32 |
| Rosuvastatin Calcium | 105 | 35 |
| Alprazolam | 60 | 14 |
| Empagliflozinbrand: Jardiance | 54 | 15 |
| Metformin Hclbrand: Metformin Hcl Er | 48 | 20 |
| Dulaglutidebrand: Trulicity | 48 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$877 across 39 records (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
- 2006-03-07
- Last updated
- 2016-09-27
Frequently asked questions
- What is Earl Nielsen's NPI number?
- Earl Nielsen's National Provider Identifier (NPI) is 1770550030, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Earl Nielsen's specialty?
- Earl Nielsen is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Earl Nielsen located?
- Earl Nielsen's practice location on file with NPPES is 435 South St, Morristown, NJ 07960-6422.
- What is Earl Nielsen's phone number?
- The practice phone number listed in the NPPES registry for Earl Nielsen is (973) 971-7165.
- Does Earl Nielsen accept Medicare?
- Earl Nielsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Earl Nielsen's NPI active?
- Yes — Earl Nielsen's NPI (1770550030) is active in the NPPES registry as of the last update on 2016-09-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.