Megan B. Littlefield, M.D.
Internal Medicine Physician · Billings, MT
Megan B. Littlefield, M.D. is an internal medicine physician with a practice address in Billings, Montana, and NPI 1013964287, issued on May 31, 2006. Check the license (Montana 12778, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Megan B. Littlefield
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 12778 MT
225423 MA
Self-reported in NPPES; status is on the state search - Practice location
- 123 S 27TH St, Billings, MT 59101
- Phone
- (406) 247-3350
- Enumerated
- May 31, 2006
- Record last updated
- May 8, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (406) 247-3389
- Medicare enrollment
- Enrolled (PECOS I20111028000176); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 324 in Montana → Look up another NPI →
Also registered at 123 S 27TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Emily AertsClinical Social Worker1154894186
- Dale Agner, M.D.Family Medicine Physician1861486490
- Hannah Akard, RNCase Management Registered Nurse1346938750
- Doug AndersenSocial Worker1619392321
- Rachel AndersonRegistered Dietitian1174847099
- Tammi Anderson, LCPC, LACMental Health Counselor1083956783
Verify Megan B. Littlefield in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 12778Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 91% of the cost of the top drugs
1,188 Medicare Part D claims for 296 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 54 claims were for opioids.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Shingrix79 claims
- Typhim Vi77 claims
- Arexvy65 claims
- Twinrix58 claims
- Atorvastatin Calcium55 claims
- Boostrix Tdap54 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.
Bills Medicare through one group practice
- Yellowstone City-County Health DeptBillings, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Megan B. Littlefield among 324 internal medicine physician records in Montana
Megan B. Littlefield, M.D. is one of 324 internal medicine physician records with a practice address in Montana. 72% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 44% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1999 · median 2006 among the 191 with a school on file
- Record last updated2015 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
80 internal medicine physician records list a practice address in Billings
They are 80 of the 4,035 NPPES records with a practice address in Billings, and 324 internal medicine physician records in Montana.
All 324 in Montana → Every provider in Billings → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Gay Canaris, MDBillings, MT 591011851358147
- Baskar Duval, MDBillings, MT 591011346289758
- Amy Fishburn, MDBillings, MT 591011578500716
- Bradley Fuller, MDBillings, MT 591011083652564
- Michael Hagan, MDBillings, MT 591011710924642
- Matthew Hermann, MDBillings, MT 591011821039355
- Richard Leblond, MDBillings, MT 591011184612715
- Mark Lee, M.D.Billings, MT 591011902884703
Common questions
What is Megan B. Littlefield, M.D.'s NPI number?
Megan B. Littlefield, M.D.'s National Provider Identifier (NPI) is 1013964287, issued on May 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Megan B. Littlefield, M.D. located?
The NPPES record lists a practice address at 123 S 27TH St, Billings, MT, 59101. Phone: (406) 247-3350. Providers update this record themselves, so call before visiting.
How can I verify Megan B. Littlefield, M.D.'s license?
NPPES lists Montana license number 12778, 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 Megan B. Littlefield, M.D. prescribe under Medicare Part D?
In 2024, Megan B. Littlefield, M.D. had 1,188 Medicare Part D claims for 296 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.