Earl Frederick Nielsen, MD
Nephrology Physician · Morristown, NJ
Earl Frederick Nielsen, MD is a nephrology physician with a practice address in Morristown, New Jersey, and NPI 1770550030, issued on Mar 7, 2006. Check the license (New Jersey MA026976, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Earl Frederick Nielsen
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- MA026976 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 435 South St, Morristown, NJ 07960
- Phone
- (973) 971-7165
- Enumerated
- Mar 7, 2006
- Record last updated
- Sep 27, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicaid ID
- 0607703 NJ
- Medicare enrollment
- Enrolled (PECOS I20050929000856); accepts Medicare assignment
- Medical or professional school
- University Of Vermont College Of Medicine, 1966
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 433 in New Jersey → Look up another NPI →
Also registered at 435 South St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Elsie AltemaAdult Health Nurse Practitioner1073941274
- Nalini Asokan, MDInternal Medicine Physician1235100389
- Jessalyn Brower, MSGenetic Counselor (M.S.)1063038008
- Maria Carter, RDNRegistered Dietitian1063063808
- Jajin Chon, M.D.Endocrinology, Diabetes & Metabolism Physician1346320553
Verify Earl Frederick Nielsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license MA026976Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% more Medicare Part D claims than the average nephrology physician in 2024
1,792 Medicare Part D claims for 182 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. 40 claims were for opioids.
Most prescribed
- Amlodipine Besylate105 claims
- Rosuvastatin Calcium105 claims
- Alprazolam60 claims
- Jardiance54 claims
- Metformin Hcl Er48 claims
- Trulicity48 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $877.38
39 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Practice Associates Medical GroupMorristown, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Earl Frederick Nielsen among 433 nephrology physician records in New Jersey
Earl Frederick Nielsen, MD is one of 433 nephrology physician records with a practice address in New Jersey. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 46% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 78% of these records are
- Graduated1966 · median 2000 among the 337 with a school on file
- Record last updated2016 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in New Jersey
There are 433 nephrology physician records in New Jersey.
All 433 in New Jersey → Every provider in Morristown → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Dana Assis, M.D.Morristown, NJ 079601508128851
- Emmanuel Aydin-Ghormoz, M.D.Morristown, NJ 079601679969315
- Alan Charney, M.D.Morristown, NJ 079601881707594
- Barry Eppinger, D.O.Morristown, NJ 079601336233956
- Paul Fine, M.D.Morristown, NJ 079601164517918
- Mark Johnson, M.D.Morristown, NJ 079601578670931
- Dale Lee, MDMorristown, NJ 079601710407580
- Barbara Price, M.D.Morristown, NJ 079601346335114
Common questions
What is Earl Frederick Nielsen, MD's NPI number?
Earl Frederick Nielsen, MD's National Provider Identifier (NPI) is 1770550030, issued on Mar 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Earl Frederick Nielsen, MD located?
The NPPES record lists a practice address at 435 South St, Morristown, NJ, 07960. Phone: (973) 971-7165. Providers update this record themselves, so call before visiting.
How can I verify Earl Frederick Nielsen, MD's license?
NPPES lists New Jersey license number MA026976, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Earl Frederick Nielsen, MD prescribe under Medicare Part D?
In 2024, Earl Frederick Nielsen, MD had 1,792 Medicare Part D claims for 182 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.