Joshua Laurence Tarkan, M.D.
Nephrology Physician · Newburyport, MA
Joshua Laurence Tarkan, M.D. is a nephrology physician with a practice address in Newburyport, Massachusetts, and NPI 1922104884, issued on Sep 16, 2006. Check the license (Massachusetts 220460, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Joshua Laurence Tarkan
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 220460 MA
Self-reported in NPPES; status is on the state search - Practice location
- 260 Merrimac St, Newburyport, MA 01950
- Phone
- (978) 499-7400
- Enumerated
- Sep 16, 2006
- Record last updated
- Apr 23, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (978) 499-7326
- Medicaid ID
- 110037949A MA
- Medicare enrollment
- Enrolled (PECOS I20040730000587); accepts Medicare assignment
- Medical or professional school
- Emory University School Of Medicine, 2001
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 260 Merrimac St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stephen Beaudoin, M.D.Internal Medicine Physician1902808124
- Kennedy Brown, DCChiropractor1154009991
- Kimberly Carter, CNPFamily Nurse Practitioner1801260344
- Deborah Casson, N.P.Family Nurse Practitioner1639361892
- Maureen Cullen, NPNurse Practitioner1578522702
- Jennah Dieter, D.C.Chiropractor1508873795
Verify Joshua Laurence Tarkan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 220460Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% more Medicare Part D claims than the average nephrology physician in 2024
2,355 Medicare Part D claims for 476 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Calcitriol667 claims
- Furosemide177 claims
- Lisinopril163 claims
- Amlodipine Besylate154 claims
- Sevelamer Carbonate116 claims
- Losartan Potassium90 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 2 group practices
- Mass General Brigham Community Physicians IncNewburyport, MA
- Mass General Brigham Medical Group Northern Massachusetts IncDanvers, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nephrology Physician providers in Massachusetts
There are 417 nephrology physician records in Massachusetts.
Other nephrology physician records in Massachusetts
- Amtul Aala, MDBoston, MA1174946347
- Reza Abdi, MDBoston, MA1356359368
- Marat Abdullin, M.D.Springfield, MA1619159712
- Vivian AbernethyBoston, MA1710960232
- Rekha Abichandani, M.D.Cambridge, MA1912033598
- Konstantin Abramov, M.D.Worcester, MA1992854707
- Krishna Agarwal, M.B.B.S.Springfield, MA1477916120
- Nikhil AgrawalBoston, MA1467722579
- Ayman Al Jurdi, M.D.Boston, MA1043690332
- Laith Al Rabadi, M.D.Boston, MA1821309188
Common questions
What is Joshua Laurence Tarkan, M.D.'s NPI number?
Joshua Laurence Tarkan, M.D.'s National Provider Identifier (NPI) is 1922104884, issued on Sep 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joshua Laurence Tarkan, M.D. located?
The NPPES record lists a practice address at 260 Merrimac St, Newburyport, MA, 01950. Phone: (978) 499-7400. Providers update this record themselves, so call before visiting.
How can I verify Joshua Laurence Tarkan, M.D.'s license?
NPPES lists Massachusetts license number 220460, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joshua Laurence Tarkan, M.D. prescribe under Medicare Part D?
In 2024, Joshua Laurence Tarkan, M.D. had 2,355 Medicare Part D claims for 476 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.