John Nicholas Walter, M.D.
Family Medicine Physician · Keene, NH
John Nicholas Walter, M.D. is a family medicine physician with a practice address in Keene, New Hampshire, and NPI 1598779662, issued on Jul 27, 2006. Check the license (New Hampshire 8246, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- John Nicholas Walter
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 8246 NH
Self-reported in NPPES; status is on the state search - Practice location
- 590 Court Street, Keene, NH 03431
- Phone
- (603) 354-5400
- Enumerated
- Jul 27, 2006
- Record last updated
- Jul 31, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicaid IDs
- 0RE0614 VT
3074768 NH - Medicare enrollment
- Enrolled (PECOS I20051020001023); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 1984
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 816 in New Hampshire → Look up another NPI →
Also registered at 590 Court Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Katelyn Ahern, APRNFamily Nurse Practitioner1922438944
- Russell Arpin, PAPhysician Assistant1043784077
- Matthew Batis, PA-CSurgical Physician Assistant1649761206
- Evgeny Buharin, MDInternal Medicine Physician1720467731
- Joanne Bulley, MDSpecialist1609812288
- Frederick Burgess, MDAnesthesiology Physician1508823477
Verify John Nicholas Walter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 8246Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% more Medicare Part D claims than the average family medicine physician in 2024
6,817 Medicare Part D claims for 176 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 233 claims were for opioids.
Most prescribed
- Levothyroxine Sodium347 claims
- Furosemide331 claims
- Gabapentin287 claims
- Potassium Chloride270 claims
- Atorvastatin Calcium246 claims
- Eliquis225 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 76 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Dartmouth-Hitchcock ClinicWinchester, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Nicholas Walter among 816 family medicine physician records in New Hampshire
John Nicholas Walter, M.D. is one of 816 family medicine physician records with a practice address in New Hampshire. 74% 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, 43% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1984 · median 2003 among the 498 with a school on file
- Record last updated2018 · 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 207Q00000X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
43 family medicine physician records list a practice address in Keene
They are 43 of the 1,482 NPPES records with a practice address in Keene, and 816 family medicine physician records in New Hampshire.
All 816 in New Hampshire → Every provider in Keene → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Judith Boule, M.D.Keene, NH 034311912939240
- Joseph Capobianco, MDKeene, NH 034311710976105
- Don Caruso, MDKeene, NH 034311477571545
- Erika Goldstein, ARNPKeene, NH 034311659338838
- Marika Henegan, MDKeene, NH 034311477558385
- Steven Hertford, MDKeene, NH 034311225050776
- Douglas Keene, M.D.Keene, NH 034311407874415
- Gerard Kiernan, MDKeene, NH 034311295752038
Common questions
What is John Nicholas Walter, M.D.'s NPI number?
John Nicholas Walter, M.D.'s National Provider Identifier (NPI) is 1598779662, issued on Jul 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Nicholas Walter, M.D. located?
The NPPES record lists a practice address at 590 Court Street, Keene, NH, 03431. Phone: (603) 354-5400. Providers update this record themselves, so call before visiting.
How can I verify John Nicholas Walter, M.D.'s license?
NPPES lists New Hampshire license number 8246, as entered by the provider. Search the New Hampshire Board of Medicine at https://www.oplc.nh.gov/board-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Nicholas Walter, M.D. prescribe under Medicare Part D?
In 2024, John Nicholas Walter, M.D. had 6,817 Medicare Part D claims for 176 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is John Nicholas Walter, M.D.'s MIPS final score?
The 2023 MIPS final score is 76 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.