Walter A. Lajara-Nanson, M.D.
Neurology Physician · Great Falls, MT
Walter A. Lajara-Nanson, M.D. is a neurology physician with a practice address in Great Falls, Montana, and NPI 1528050283, issued on Aug 18, 2005. Check the license (Montana 75041, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Walter A. Lajara-Nanson
- Credential
- M.D.
- Primary taxonomy
- Neurology Physician 2084N0400X
- License numbers
- 75041 MT
L4510 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1401 25TH Street South, Great Falls, MT 59405
- Phone
- (406) 731-8888
- Enumerated
- Aug 18, 2005
- Record last updated
- Apr 8, 2024
- Fax
- (406) 731-8876
- Medicaid ID
- 100056860A OK
- Medicare enrollment
- Enrolled (PECOS I20190508001580); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 54 in Montana → Look up another NPI →
Verify Walter A. Lajara-Nanson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 75041Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average neurology physician in 2024
3,235 Medicare Part D claims for 260 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 25 claims were for opioids.
Most prescribed
- Donepezil Hcl220 claims
- Carbidopa-Levodopa201 claims
- Clonazepam166 claims
- Lacosamide134 claims
- Levetiracetam134 claims
- Pregabalin120 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): 80.5 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).
Industry payments in 2024: $783.79
31 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 10,858 providers of this specialty with any payment received $8,318.07 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.
One hospital affiliation
- Benefis Hospitals IncGreat Falls, MT · Acute Care Hospitals2 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Walter A. Lajara-Nanson among 54 neurology physician records in Montana
Walter A. Lajara-Nanson, M.D. is one of 54 neurology physician records with a practice address in Montana. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 87% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1991 · median 2000 among the 37 with a school on file
- Record last updated2024 · 39% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in Montana
There are 54 neurology physician records in Montana.
All 54 in Montana → Every provider in Great Falls → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Eliad Culcea, MDGreat Falls, MT 594051831172816
- Dennis Dietrich, MDGreat Falls, MT 594051871677245
- Deborah Dover, MDGreat Falls, MT 594051972504850
- William Henning, DOGreat Falls, MT 594051053495432
- Cody Sanders, MDGreat Falls, MT 594051952968125
- Mallory Emig, MDHelena, MT 596011831696236
- Thomas Mulgrew, MDHelena, MT 596011457452070
- Sylvia Rojas, M.D.Helena, MT 596011851344329
Common questions
What is Walter A. Lajara-Nanson, M.D.'s NPI number?
Walter A. Lajara-Nanson, M.D.'s National Provider Identifier (NPI) is 1528050283, issued on Aug 18, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Walter A. Lajara-Nanson, M.D. located?
The NPPES record lists a practice address at 1401 25TH Street South, Great Falls, MT, 59405. Phone: (406) 731-8888. Providers update this record themselves, so call before visiting.
How can I verify Walter A. Lajara-Nanson, M.D.'s license?
NPPES lists Montana license number 75041, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Walter A. Lajara-Nanson, M.D. prescribe under Medicare Part D?
In 2024, Walter A. Lajara-Nanson, M.D. had 3,235 Medicare Part D claims for 260 beneficiaries; the average among neurology physician prescribers was 1,370. Part D covers Medicare prescriptions only.
What is Walter A. Lajara-Nanson, M.D.'s MIPS final score?
The 2023 MIPS final score is 80.5 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.