Mary Irene B. Feria, M.D.
Endocrinology, Diabetes & Metabolism Physician · Kalispell, MT
Mary Irene B. Feria, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Kalispell, Montana, and NPI 1447244454, issued on Sep 6, 2005. Check the license (Montana 41983, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mary Irene B. Feria
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- 41983 MT
34363 IA
036-108978 IL
MD60147278 WA
Self-reported in NPPES; status is on the state search - Practice location
- 430 Windward Way, Kalispell, MT 59901
- Phone
- (406) 751-5364
- Enumerated
- Sep 6, 2005
- Record last updated
- Feb 19, 2024
- Fax
- (406) 751-5367
- Medicaid ID
- 1447244454 WA
- Medicare enrollment
- Enrolled (PECOS I20151221001010); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 23 in Montana → Look up another NPI →
Also registered at 430 Windward Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Boharski, M.D.Specialist1164400396
- James Hoag, DDSPeriodontics1396837357
- Jason Schmidt, MDFamily Medicine Physician1326093477
- Richard Wise, MDFamily Medicine Physician1851344808
Verify Mary Irene B. Feria in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 41983Check 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% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
2,585 Medicare Part D claims for 253 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 53% of claims.
Most prescribed
- Ozempic290 claims
- Levothyroxine Sodium243 claims
- Jardiance135 claims
- Metformin Hcl104 claims
- Methimazole99 claims
- Lantus Solostar80 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: $61.29
3 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 5,661 providers of this specialty with any payment received $5,742.15 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 one group practice
- Kalispell Regional Medical Center IncColumbia Falls, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Irene B. Feria among 23 endocrinology, diabetes & metabolism physician records in Montana
Mary Irene B. Feria, M.D. is one of 23 endocrinology, diabetes & metabolism physician records with a practice address in Montana. 83% 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, 83% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1994 · median 2002 among the 15 with a school on file
- Record last updated2024 · 26% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Montana
There are 23 endocrinology, diabetes & metabolism physician records in Montana.
All 23 in Montana → Every provider in Kalispell → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Jose De Souza, MDKalispell, MT 599011275534158
- Alison Schneider, MDKalispell, MT 599011124184411
- Rino Buzzola, M.D.Missoula, MT 598021730451287
- Christopher Corsi, MDMissoula, MT 598021174577589
- Michele Danicich, MDMissoula, MT 598021053321273
- Meredith Ross, M.D.Missoula, MT 598021730449380
- Nancy Eyler, MDMissoula, MT 598011235149451
- Ruth Sampson, M.D.Missoula, MT 598011851476287
Common questions
What is Mary Irene B. Feria, M.D.'s NPI number?
Mary Irene B. Feria, M.D.'s National Provider Identifier (NPI) is 1447244454, issued on Sep 6, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mary Irene B. Feria, M.D. located?
The NPPES record lists a practice address at 430 Windward Way, Kalispell, MT, 59901. Phone: (406) 751-5364. Providers update this record themselves, so call before visiting.
How can I verify Mary Irene B. Feria, M.D.'s license?
NPPES lists Montana license number 41983, 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 Mary Irene B. Feria, M.D. prescribe under Medicare Part D?
In 2024, Mary Irene B. Feria, M.D. had 2,585 Medicare Part D claims for 253 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.