Mark R. Johnson, M.D.
Nephrology Physician · Morristown, NJ
Mark R. Johnson, M.D. is a nephrology physician with a practice address in Morristown, New Jersey, and NPI 1578670931, issued on Aug 23, 2006. Check the license (New Jersey 25MA08685600, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mark R. Johnson
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 25MA08685600 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 100 Madison Ave, Morristown, NJ 07960
- Phone
- (973) 971-7165
- Enumerated
- Aug 23, 2006
- Record last updated
- Jan 7, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (973) 290-7521
- Medicaid ID
- 02784701 NY
- Medicare enrollment
- Enrolled (PECOS I20100304000010); accepts Medicare assignment
- Medical or professional school
- New York University School Of Medicine, 2003
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 433 in New Jersey → Look up another NPI →
Also registered at 100 Madison Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Karen AbboudDentist1659121259
- Omar Abdelfattah, MBBCHStudent in an Organized Health Care Education/Training Program1003444167
- Ahmed Abdelhalim, MDInternal Medicine Physician1104386051
- Bavly Abdelmesih, MDStudent in an Organized Health Care Education/Training Program1932901378
- Fatema Abdulhussein, MDStudent in an Organized Health Care Education/Training Program1235514274
- Arkadiy Abkin, MDAnesthesiology Physician1316928666
Verify Mark R. Johnson 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 25MA08685600Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average nephrology physician in 2024
327 Medicare Part D claims for 81 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Hydrochlorothiazide46 claims
- Amlodipine Besylate37 claims
- Tamsulosin Hcl34 claims
- Calcitriol21 claims
- Losartan Potassium20 claims
- Torsemide17 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.
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).
Mark R. Johnson among 433 nephrology physician records in New Jersey
Mark R. Johnson, M.D. 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
- Graduated2003 · median 2000 among the 337 with a school on file
- Record last updated2010 · 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
- Dale Lee, MDMorristown, NJ 079601710407580
- Earl Nielsen, MDMorristown, NJ 079601770550030
- Barbara Price, M.D.Morristown, NJ 079601346335114
Common questions
What is Mark R. Johnson, M.D.'s NPI number?
Mark R. Johnson, M.D.'s National Provider Identifier (NPI) is 1578670931, issued on Aug 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark R. Johnson, M.D. located?
The NPPES record lists a practice address at 100 Madison Ave, Morristown, NJ, 07960. Phone: (973) 971-7165. Providers update this record themselves, so call before visiting.
How can I verify Mark R. Johnson, M.D.'s license?
NPPES lists New Jersey license number 25MA08685600, 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 Mark R. Johnson, M.D. prescribe under Medicare Part D?
In 2024, Mark R. Johnson, M.D. had 327 Medicare Part D claims for 81 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.