Walter Peter Mutter, M.D.
Nephrology Physician · Newton, MA
Walter Peter Mutter, M.D. is a nephrology physician with a practice address in Newton, Massachusetts, and NPI 1104895556, issued on Mar 17, 2006. Check the license (Massachusetts 210130, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Walter Peter Mutter
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 210130 MA
Self-reported in NPPES; status is on the state search - Practice location
- Newton Wellesley Physicians Nephrology, Newton, MA 20462
- Phone
- (617) 243-5420
- Enumerated
- Mar 17, 2006
- Record last updated
- May 6, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicaid ID
- 0167100 MA
- Medicare enrollment
- Enrolled (PECOS I20070124000225); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 1999
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Verify Walter Peter Mutter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 210130Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% fewer Medicare Part D claims than the average nephrology physician in 2024
882 Medicare Part D claims for 203 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Losartan Potassium125 claims
- Amlodipine Besylate101 claims
- Lisinopril99 claims
- Torsemide83 claims
- Hydrochlorothiazide68 claims
- Potassium Citrate Er48 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: $59.98
5 payments; by number, the most common kind was education; the largest payer was Travere Therapeutics, 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 2 group practices
- Mass General Brigham Medical Group Suburban Massachusetts IncWellesley, MA
- Massachusetts General Physicians Organization IncBoston, 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 Walter Peter Mutter, M.D.'s NPI number?
Walter Peter Mutter, M.D.'s National Provider Identifier (NPI) is 1104895556, issued on Mar 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Walter Peter Mutter, M.D. located?
The NPPES record lists a practice address at Newton Wellesley Physicians Nephrology, Newton, MA, 20462. Phone: (617) 243-5420. Providers update this record themselves, so call before visiting.
How can I verify Walter Peter Mutter, M.D.'s license?
NPPES lists Massachusetts license number 210130, 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 Walter Peter Mutter, M.D. prescribe under Medicare Part D?
In 2024, Walter Peter Mutter, M.D. had 882 Medicare Part D claims for 203 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.