Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Martin S Walko, M.D.
Surgery Physician in Derry, NH · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1104837178
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Registry record
Entity type Individual (Type 1)
Name Martin S Walko
Credential M.D.
Sex Male
Practice address 6 Tsienneto Rd, Derry, NH, 03038
Phone (603) 434-7444
Fax (603) 434-1733
Enumeration date Aug 11, 2006
Last updated in NPPES Jan 28, 2022
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0RE5299 | Medicaid | VT | - |
| 911003800 | Medicaid | MD | - |
| 1031721820001 | Medicaid | PA | - |
| 3081247 | Medicaid | NH | - |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
How do I verify Martin Walko's NPI record?
Cross-check NPI 1104837178 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1104837178 active?
Yes, as of the latest NPPES snapshot, NPI 1104837178 is active (record last updated 2022-01-28).
Other providers at this practice address
Browse all → Jeffrey Rind Neurology Physician · Derry, NH NPI 1740282375 John Rescigno Neurology Physician · Derry, NH NPI 1215939715 Elisa Mercuro Family Medicine Physician · Derry, NH NPI 1609860352 Volker Kropp Surgery Physician · Derry, NH NPI 1710971270 Rebecca Wessling Physician Assistant · Derry, NH NPI 1396730982 Matthew Levine Diagnostic Radiology Physician · Derry, NH NPI 1104804509 Cristi Egenolf Family Medicine Physician · Derry, NH NPI 1053391565 John Daley Family Medicine Physician · Derry, NH NPI 1720058944
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-01-28.