Otis Barnum, DO
Internal Medicine Physician · Natchitoches, LA
Otis Barnum, DO is an internal medicine physician with a practice address in Natchitoches, Louisiana, and NPI 1245224559, issued on Sep 1, 2005. Check the license (Louisiana 018855, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Otis Barnum
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 018855 LA
Self-reported in NPPES; status is on the state search - Practice location
- 617 Bienville St, Natchitoches, LA 71457
- Phone
- (318) 352-9880
- Enumerated
- Sep 1, 2005
- Entity
- Type 1 · individual
Also registered at 617 Bienville St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Margaret Barnum, N.P.Family Nurse Practitioner1487798823
- Haley JohnsonFamily Nurse Practitioner1427408137
- William Luster, MDFamily Medicine Physician1467695528
Verify Otis Barnum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license 018855Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
3.0 times the Medicare Part D claims of the average internal medicine physician in 2024
8,322 Medicare Part D claims for 490 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 620 claims were for opioids.
Most prescribed
- Alprazolam306 claims
- Hydrocodone-Acetaminophen300 claims
- Atorvastatin Calcium265 claims
- Omeprazole257 claims
- Tramadol Hcl233 claims
- Amlodipine Besylate223 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: $230.13
12 payments, mostly food and beverage; the largest payer was Pfizer Inc.. The 65,274 providers of this specialty with any payment received $2,536.66 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.
8 internal medicine physician records list a Natchitoches practice address
They are 8 of the 556 NPPES records with a Natchitoches practice address, and 1,870 internal medicine physician records in Louisiana.
All 8 in Natchitoches → All 1,870 in Louisiana → Every provider in Natchitoches →
Other internal medicine physician records in Louisiana
- Alfred Abaunza, M.D.New Orleans, LA1093994287
- Mokhtar AbdallahBaton Rouge, LA1285050799
- David Abdehou, MDShreveport, LA1568471993
- Mazin Abdelghany, MDCovington, LA1427430669
- Youssef Abdelmalek, M.DAlexandria, LA1639553233
- Mary Abell, M.D.New Orleans, LA1083631089
- Halim Abou-Faycal, MDShreveport, LA1942241708
- Niksad Abraham, MDGonzales, LA1033246970
- Shaun Abraham, M.D.Baton Rouge, LA1174883722
- Shema Abraham, M.DLafayette, LA1285053405
Common questions
What is Otis Barnum, DO's NPI number?
Otis Barnum, DO's National Provider Identifier (NPI) is 1245224559, issued on Sep 1, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Otis Barnum, DO located?
The NPPES record lists a practice address at 617 Bienville St, Natchitoches, LA, 71457. Phone: (318) 352-9880. Providers update this record themselves, so call before visiting.
How can I verify Otis Barnum, DO's license?
NPPES lists Louisiana license number 018855, as entered by the provider. Search the Louisiana State Board of Medical Examiners at https://www.lsbme.la.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Otis Barnum, DO prescribe under Medicare Part D?
In 2024, Otis Barnum, DO had 8,322 Medicare Part D claims for 490 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.